- Open Access
Relationship between health-related quality of life, and acute care re-admissions and survival in older adults with chronic illness
Health and Quality of Life Outcomesvolume 11, Article number: 136 (2013)
Australia’s ageing population means that there is increasing emphasis on developing innovative models of health care delivery for older adults. The assessment of the most appropriate mix of services and measurement of their impact on patient outcomes is challenging. The aim of this evaluation was to describe the health related quality of life (HRQoL) of older adults with complex needs and to explore the relationship between HRQoL, readmission to acute care and survival.
The study was conducted in metropolitan Melbourne, Australia; participants were recruited from a cohort of older adults enrolled in a multidisciplinary case management service. HRQoL was measured at enrolment into the case-management service using The Assessment of Quality of Life (AQoL) instrument. In 2007–2009, participating service clinicians approached their patients and asked for consent to study participation. Administrative databases were used to obtain data on comorbidities (Charlson Comorbidity Index) at enrolment, and follow-up data on acute care readmissions over 12 months and five year mortality. HRQoL was compared to aged-matched norms using Welch’s approximate t-tests. Univariate and multivariate logistic regression models were used to explore which patient factors were predictive of readmissions and mortality.
There were 210 study participants, mean age 78 years, 67% were female. Participants reported significantly worse HRQoL than age-matched population norms with a mean AQOL of 0.30 (SD 0.27). Seventy-eight (38%) participants were readmitted over 12-months and 5-year mortality was 65 (31%). Multivariate regression found that an AQOL utility score <0.37 (OR 1.95, 95%CI, 1.03 – 3.70), and a Charlson Comorbidity Index ≥6 (OR 4.89, 95%CI 2.37 – 10.09) were predictive of readmission. Multivariate analysis demonstrated that age ≥80 years (OR 7.15, 95%CI, 1.83 – 28.02), and Charlson Comorbidity Index ≥6 (OR 6.00, 95%CI, 2.82 – 12.79) were predictive of death.
This study confirms that the AQoL instrument is a robust measure of HRQoL in older community-dwelling adults with chronic illness. Lower self-reported HRQoL was associated with an increased risk of readmission independently of comorbidity and kind of service provided, but was not an independent predictor of five-year mortality.
Australia’s ageing population means that there is increasing demand on acute health care services and greater emphasis is being placed on innovative community-based models of health care delivery for older adults. The assessment of the most appropriate mix of services for an individual and measurement of whether such services have had a positive impact on patient outcomes is a challenging issue; especially since over 80% of those aged over 65 years have three or more chronic health conditions (i.e. a condition lasting more than 6-months) . Under these circumstances the use of disease-specific outcome measures to assess the impact of health interventions on health-related quality of life (HRQoL) may be inappropriate as comorbidities may be ignored and/confound results. Additionally, issues of validity confound the use of disease-specific measures as these instruments emphasise the impact of disease symptoms rather than HRQoL as a holistic construct. When models of care are predominantly focused on coordination and access to social care services rather than disease-specific symptom management, there is a need to use instruments that measure HRQoL as a holistic construct.
In contrast to disease-specific measures, generic HRQoL instruments aim to measure the impact of an individual’s health on important aspects of their lives (including psychological well-being, independence, social functioning) and may be more appropriate measures of overall improvements. The Assessment of Quality of Life (AQoL)  is one generic instrument that has been developed for and validated in the Australian population [3, 4] and has been demonstrated to be a sensitive measure of HRQoL in community dwelling older adults .
The Northern Alliance Hospital Admission Program (NA-HARP) complex needs service provides care to a socio-economically disadvantaged population living in the northern metropolitan region of Melbourne, Australia . It includes a high proportion (approximately 60%) of individuals whose first language is other than English. The purpose of the NA-HARP program is to decrease the need for acute care admission by optimising medical and social care within a community setting. At enrolment into the service a comprehensive assessment is performed by a member of the multidisciplinary team to ensure that clients are offered a ‘package of care’ that is most appropriate to their needs. This study was undertaken to evaluate whether including a measure of HRQoL at the initial assessment would provide clinicians’ with information about their future prognosis and demand for acute health care services that would be useful when planning care.
The aim of this evaluation was to describe the HRQoL of older adults with complex needs and to explore the relationship between HRQoL, readmission to acute care and survival. We hypothesised that individuals with lower self-reported HRQoL would have greater acute health care utilisation and higher mortality than those within the normal age–adjusted range.
The Northern Alliance Hospital Admission Program (NA-HARP) complex needs service offers multidisciplinary case management and care coordination for older clients (typically ≥60 years) with complex health needs that put them at high risk of requiring acute care admission. The service included two models of care: (a) a rapid assessment and care coordination service (RAC) for patients recently discharged from acute care and (b) a community case-management (CCM) and support service for high-risk older adults living independently in the community. The RAC provided access to geriatrician review for unstable medical problems and short-term case-management. The CMM service provides long-term case-management within a community care setting with medical management provided by the clients’ primary care physicians.
A prospective, longitudinal cohort design was used to evaluate the impact of HRQoL on 12 month readmission rates and five year mortality . Baseline data was collected from September 2007 to 2009 and follow-up data was obtained until December 2012. This project was approved by the Northern Health institutional human research ethics committee, the requirement for written informed consent was waivered; but patients included in this study gave verbal consent to study participation.
Participants were patients enrolled in the NA-HARP complex needs service that had given verbal consent to study participation and completed the AQoL at program enrolment.
From 2007 to 2009, NA-HARP clinicians approached their patients and obtained verbal consent for study participation. Surveys were either distributed by mail or given to participants following their first assessment visit with the service to facilitate study participation and self-completion of the AQoL. Surveys were returned to the service by reply paid post. Although the AQoL has been translated into several languages, professional interpreters were made available to assist participants who spoke a language other than English and those with limited literacy.
The AQoL is a validated, multi-attribute utility instrument designed to assess HRQoL that is sensitive to a range of patient conditions and care models . It measures five dimensions: “Illness”, “independent living”, “social relationships”, “physical senses”, and “psychological wellbeing”. These scales are scored as proportions on a 0.00-1.00 scale. Scores from the last four dimensions are combined using a multiplicative model weighted with community values to compute the utility index, which is suitable for use in cost-utility analysis . The utility scores range from −0.04 (HRQoL worse than death), 0.00 (representing death equivalent states), to 1.00 (full HRQoL). The AQOL is designed to be self-administered taking an average of five to seven minutes to complete. Population norms are available, which allow the results to be interpreted relative to the age-matched average Australian population [3, 4]. The published minimum important difference (MID) is 0.06 utilities .
Administrative data was used to classify patients’ primary reasons for enrolment into the NA-HARP service according to ICD-10 codes [7, 8]. The Charlson Comorbidity score (Charlson) at baseline was calculated based on patients’ primary and secondary ICD-10 diagnoses codes from acute care admissions prior to the patient’s enrolment in the NA-HARP complex needs service. Charlson weights were allocated to ICD-10 scores using the algorithm developed by Quan e al. [9, 10].
At the end of the follow-up period, the number of readmissions to acute care in the 12-months following enrolment and five year mortality data were obtained from the regional health service’s administrative dataset and verified by audit of individual patient medical records. Data was obtained on both the number and time (measured in years) to these outcomes.
Administrative and AQoL data were retrieved for patients enrolled in the service between September 2007 and September 2009. Continuous data were summarised as means and standard deviations (SDs); categorical data as frequencies and percentage, differences in proportions were analysed with Chi-square (χ2) tests, differences in continuous outcomes using T-tests and ANOVA.
Examination of AQoL utilities revealed that the data were non-normally distributed. Prior to statistical analysis, AQoL scores were transformed to remove data skew, although untransformed means and SDs are reported in the interests of readability. Missing AQoL item data were imputed using horizontal mean imputation, restricted to <30% of items. Differences in baseline AQoL utilities were analysed with analysis of variance (ANOVA). Mean AQoL scores were compared with published population data across age deciles using Welch’s approximate t-tests to control for differences in data distributions . Differences between the aged care services (RAC, CCM) in baseline AQoL scores and 12-month readmission rates were compared using independent t-tests. Statistical significance was set at p < 0.05. Univariate logistic regression was used to assess which factors were predictive of 12-month re-admissions and five year mortality . AQoL scores were dichotomized at two standard deviations below the population norm (ie: (<0.37/≥0.37) . and Charlson scores were dichotomized at the cut-point for the highest quartile (≤5/6-15) . Multivariate logistic regression, using a forward stepwise model, was used to assess whether lower AQoL scores at enrolment were predictive of patients who required readmission within 12-months of enrolment and five year mortality, after adjusting for factors predictive in the univariate analysis. In the secondary analysis the AQoL was replaced iteratively with each of the AQoL dimensions. In the absence of any known cut points, the dimensions were entered as continuous variables into the model.
The study sample size was calculated according to the methodology described by Davison et al. . Previous studies of older adults have reported mean AQoL scores of 0.30-0.45 (5, 8–10) and 0.02-0.20 for hospitalized older adults [14, 15]. Taking the lower estimate for community-residing older adults (0.30) and the upper estimate for hospitalized older adults (0.20), it was apparent that a greater change in AQoL scores would be needed to predict hospitalization than the published minimum important difference of 0.06 . The difference between community-residing and hospitalized older adults was therefore accepted as the critical change score. Using Kazis’ effect size , estimated at 0.42 based on the literature above, and Davison et al’s  formula for sample sizes, the calculated sample size was 122 cases. This was then adjusted for the expected intracluster correlation coefficient (ICC) given that participants were recruited through two services (i.e. participants were clustered samples). To estimate the ICC we used the mid-point of SF-36 scale ICCs (0.08)  and calculated the design effect after Hsieh  to be 1.16; this gave a calculated sample size of 142 participants.
During the study recruitment period, 2609 individuals were enrolled in the NA-HARP Complex needs program of whom 210 (8%) were enrolled in the study. The mean follow-up time for study participants was 2.71 years (range 0.01 to 5.4 years). Participants were mostly female with an average age of 78 years, 52% were born in a country other than Australia, 26% spoke a language other than English, and 54% lived with their families (Table 1). Comparison with non-participants showed that there were no statistically significant differences in age (mean 78 (SD 8.6 years) vs. 78 (SD 7.8 years); t = 0.80, df = 2607, p = 0.43). Study participants were however, more likely to be: female (67% vs. 58%, χ2 = 5.84, df = 1, p = 0.02), living alone (χ2 = 4.59, df = 1, p = 0.03); born overseas (χ2 = 185.39, df = 1, p < 0.01); and were less likely to need the services of an interpreter (χ2 = 11.71, df = 1, p <0.01).
Sixty-three (30%) participants were enrolled in the CCM and 147 (70%) in the RAC service. The major reasons for enrolment in the NA-HARP complex needs program were: functional impairment and musculoskeletal conditions (36%), cognitive impairment or neurological conditions (17%), chronic medical conditions (39%) and other issues that required case management support (7%), (Table 1). The Charlson showed that 56% of participants had significant co-morbidities, and that this varied significantly by service: 27% of those in RAC versus 11% of those in CCM obtained Charlson scores ≥6 (χ2 = 9.06, df = 3, p = 0.03). There were no other statistically significant differences by Charlson. There were 4 (2%) patients less than 60 years included in the study, these patients had been referred to NA-HARP for case-management of complex or severe disease (Parkinson’s Disease (1), severe functional impairment secondary to obesity (2), severe chronic obstructive pulmonary disease (1)); the average Charlson score in this group was 5 (range 3–11).
The mean HRQoL for all participants was AQoL 0.30 (SD 0.27). When compared with age-matched population norms (4), participants reported significantly worse HRQoL. For those aged 60–69 years this decrement was 0.66 utilities, for those aged 70–79 years it was 0.44 utilities and for those aged 80+ years it was 0.40 utilities (Table 2). These differences exceeded the published minimum important difference (MID 0.06) for the AQoL across all three age groups included in this study.
Table 3 shows the HRQoL of participants by age group, medical condition, Charlson score and service type. There were statistically significant differences across age groups in both the physical senses and psychological wellbeing dimensions of the AQoL. For the physical senses dimension those aged ≥80 years obtained scores indicating loss of physical senses (seeing, hearing and communication ability); in contrast for the younger age group aged 60–69 years the psychological well-being dimension indicated poorer mental health (anxiety, sleep quality and pain). There were no statistically significant differences in overall AQoL utilities by age group, although the difference between those aged 60–69 years and those aged 70–79 years exceeded the published MID of 0.06 .
Participants enrolled in the RAC had statistically significantly lower AQoL utilities compared to the CMM service, as did those whose primary health problem was cardiac or muscular/pain (Table 3). Multivariate linear regression found that this difference by service (RAC/CMM) remained significant after adjusting for differences in age, gender and co-morbidities (Charlson) between the two groups (standardised βAdj = 0.28, p < 0.001). There were no statistically significant differences in AQoL utilities by age, gender or co-morbidities (Charlson). When AQoL dimensions were examined, there were statistically significant differences by service type for the independent living and social relationships dimensions with those enrolled in the RAC obtained scores indicating poorer HRQoL than those in CCM (Table 3).
Seventy-eight (38%) participants were readmitted during the 12-months following enrolment. The number of readmissions ranged from one through to 15. Of readmitted cases, 63 (82%) were enrolled in the RAC; those in this service had almost three-times the odds of readmission of those in the CCM service (OR = 2.72 (95%CI: 1.38-5.37)). Additionally, those with Charlson scores 6–15 were significantly more likely to be readmitted, with over five-times the odds of readmission compared with those with Charlson scores ≤5 (OR = 5.33 (95%CI: 2.64-10.76)). There were no statistically significant differences in readmission status by age, gender or primary health condition.
A logistic regression model was constructed to predict hospital re-admission (No/Yes). The three statistically significant variables discussed above were included in the initial model; service type (CMM/RAC), Charlson score (≤5/6-15) and AQoL (<0.37/≥0.37). Two significant predictors of readmission in the 12-months following enrolment were observed. Those with Charlson scores ≥6 had odds of readmission that were five-times that of those with scores ≤5, and those with AQoL utilities <0.37 had two-times greater odds of readmission compared with those with higher AQoL scores. In the multivariate model service type was not a significant predictor of readmission (Table 4). The AQoL was replaced with each of the AQoL dimensions, iteratively. The only AQoL dimension which statistically predicted readmission was psychological wellbeing (βadj = −2.02, p = 0.01), indicating that those with higher scores were less likely to be admitted.
By the end of follow-up 65 (31%) of study participants had died, the mean age of survivors was 77.4 years (range 50–93) and of those who died 80.0 years (range 62–100). The mean follow-up time in survivors was 2.85 years (range 0.01 to 5.41) versus mean time to death 2.3 years (range 0.01-5.2), p = 0.025. In univariate analysis, five-year mortality was predicted by age group: when compared with those aged 60–69 years there was no statistically significant increased odds of dying for those aged 70–79 years (OR: 3.30; 95%CI: 0.91 – 11.93), whereas those aged ≥80 years had an odds of death five-times greater than those aged 60–69 years (OR: 4.97; 95%CI: 1.39 – 17.69). Death was also predicted by Charlson score: those with scores ≥6 had over five-times greater odds of dying compared with those with Charlson scores <6 (OR: 5.68; 95%CI: 2.84 – 11.39); and by the dichotomized AQoL: those with scores <0.37 had an odds of dying two-times greater than those with higher scores (OR: 1.93; 95%CI: 1.01 – 3.68). There were no statistically significant differences by gender, primary health condition or type of service.
A logistic regression model was constructed to predict death, those aged ≥80 years had three-times the likelihood of dying compared with those aged 60–69 years and those with a Charlson score ≥6 had six-times the likelihood of dying when compared with those with Charlson scores ≤5. AQOL scores <0.37/≥0.37 were not significant in the multivariate model (Table 4).
The HRQoL, as assessed by the AQoL, of patients in enrolled in the NA-HARP aged care service was significantly lower than age adjusted general population norms  and was within the range of scores reported in the literature for older adults with acute or chronic health conditions. Lower AQoL scores were predictive of acute care readmission over the following 12 months.
Although only a small proportion of the older adults using the NA-HARP aged care services were included in this study, their HRQoL was similar to those reported in other studies of community-resident older adults with chronic illness [21–24]. The mean AQoL utility score for the whole sample was 0.30 (SD = 0.27), in contrast to the norm for general population aged 70–79 years which is 0.76 (SD = 0.23) . Previous studies in older adults with chronic health conditions have found that HRQoL is typically lower than this population norm; Harris et al.  reported a mean AQoL utility of 0.30 (95%CI: 0.28 to 0.32) and Osborne et al. a mean utility score of 0.33 (95%CI: 0.32- 0.35) . The findings from this study are consistent with these values, suggesting that older adults with chronic health conditions experience a HRQoL that is approximately half that of older adults in general.
The study participants who were enrolled in the long-term CCM program experienced better HRQoL than those enrolled in the RAC service probably reflecting differences in the acuity of illness between the two services. AQoL utility scores reported by the long-term community service (CCM) (mean 0.42) were comparable to those reported by Holland  and Foley  in studies of community-dwelling older adults (mean 0.40-0.45). In contrast the mean AQoL utility score in the post discharge arm (RAC) was lower than that reported by Lim and colleagues  when evaluating a post discharge case-management service, but higher than that reported in a study of frail older adults being transferred to long-term residential care (0.02–0.05) . These findings confirm that the AQoL is sensitive to differences in HRQoL in older adults , across the spectrum from healthy older adults, community-dwelling older adults with chronic conditions , those recovering from acute illness [14, 23], to those requiring long-term residential care .
Our study findings suggest that differences in overall HRQoL may be partially explained by differences in their functional capacity and psychological well-being. In this study there was a significant difference in the physical senses dimension across aged groups; probably reflecting that the impact of sensory deficits on functional capacity is greatest in the over 80 year old age group . This association is reflected in studies in the rehabilitation literature that have found direct effects of disability limitations and physical self-worth on HRQoL . A number of studies have documented that functional independence and the capacity to perform activities of daily living are considered highly important in determining older adults’ estimation of their quality of life [29–33]. The key losses among younger study participants were in their psychological wellbeing. It is possible that younger participants were struggling more with major life changes, (such as the development of significant health problems or loss of employment) whereas older participants may have reached acceptance of both these life stages. As individuals age, their personal priorities change and the factors that influence their psychological well-being evolve with their changed circumstances. Despite this AQoL scores did not statistically vary by Charlson comorbidity scores. A possible explanation lies in the disability paradox, which is where people with demonstrable poor health adjust their internal calibrations to report a good HRQoL .
A key study finding was in relation to base-line AQoL scores predicting one-year hospital readmission. This finding is consistent with Bilotta and colleagues’ study which found older adults’ assessment of overall HRQoL was independently predictive of emergency department readmissions . To confirm the robustness of this association and to demonstrate that this finding is generalizable to a wider spectrum of patients admitted to acute care, this finding needs to be validated in a larger prospective cohort study of patients being discharged from acute care.
Our study found that there were significant differences between survivors and non-survivors in their baseline assessment on the independent living dimension of the AQoL instrument, but no significant differences in the other dimensions. These findings suggest that the independent living dimension of the AQoL may provide a measure of frailty which is predictive of poor prognosis  and poor overall HRQoL . Our study found that HRQoL (measured by the AQoL) was not an independent predictor of five year mortality after adjusting for age and co-morbidities. This is in contrast to an Italian study that reported HRQoL (measured by the Older People’s Quality of Life instrument) was predictive of one year mortality after adjusting for age, frailty and co-morbidities . One explanation for these seemingly contradictory findings is the difference in follow-up time between the two studies. It is likely that co-morbidities will be a stronger predictor of prognosis than HRQoL in the medium term, and that individuals assessment of their HRQoL will change as their health status worsens. Larger sample sizes than available in our study would therefore be needed to measure an independent association between HRQoL and five-year mortality .
The study limitations included the small number of participants as a proportion of all NA-HARP participants and differences between groups in measuring the AQoL. Readmission and mortality data were obtained from the regional health service’s administrative dataset and medical record review. It is therefore possible that this is an underestimation of these outcomes as patients who are lost to follow-up may have died. This will have decreased the statistical power of the study to detect an association between AQoL scores and mortality. As participants may have been admitted to health care providers whose data is not captured in our regional health service dataset it is also possible that this has introduced bias into the study. It is possible that individuals with lower HRQoL were also less likely to access over health care providers thereby overestimating the association between low HRQoL and 12 month readmission rates. Study participants experienced a relatively small range of primary medical conditions, thereby limiting the generalizability of the study.
This study confirms that the AQoL instrument is a robust measure of HRQoL in older community-dwelling adults with chronic illness. Lower self-reported HRQoL in older adults is associated with an increased risk of hospital re-admission, but was not an independent predictor of five-year mortality in this study. Further studies are needed to validate the association between low AQoL scores and acute care readmissions.
Health-related quality of life
The assessment of quality of life instrument
The northern alliance hospital admission program
Rapid assessment and care coordination service
Intracluster correlation coefficient
Minimum important difference
95% Confidence Interval.
AIHW: Chronic diseases and associated risk factors in Australia. Canberra: Australian Institute of Health and Welfare; 2006. 2006. Report No.: Cat. no. PHE 81 Contract No.: Document Number
Hawthorne G, Richardson J, Osborne R: The Assessment of Quality of Life (AQoL) instrument: a psychometric measure of health-related quality of life. Qual Life Res 1999,8(3):209–224. 10.1023/A:1008815005736
Hawthorne G, Osborne R: Population norms and meaningful differences for the Assessment of Quality of Life (AQoL) measure. Aust N Z J Public Health 2005,29(2):136–142. 10.1111/j.1467-842X.2005.tb00063.x
Hawthorne G, Korn S, Richardson JR: Population norms for the AQoL derived from the 2007 Australian National Survey of Mental Health and Wellbeing. Aust N Z J Public Health In press; Accepted 18 October
Osborne RH, Hawthorne G, Lew EA, Gray LC: Quality of Life assessment in the community-dwelling elderly: validation of the Assessment of Quality of Life (AQoL) instrument and comparison with the SF-36. J Clin Epidemiol 2003,56(2):138–147. 10.1016/S0895-4356(02)00601-7
Berlowitz DJ, Graco M: The development of a streamlined, coordinated and sustainable evaluation methodology for a diverse chronic disease management program. Aust Health Rev 2010,34(2):148–151. 10.1071/AH08689
WHO: International Classification of Diseases. Geneva: World Health Organization; 2010. [updated 2010; cited 2011 October]; 10: [Available from http://www.who.int/classifications/icd/en/]
WHO: The ICD-10 Classification of Mental and Behavioural Disorders Diagnostic Criteria for Research. Geneva: World Health Organisation; 1993. Available from http://www.who.int/classifications/icd/en/GRNBOOK.pdf
Quan H, Sundararajan V, Halfon P, Fong A, Burnand B, Luthi JC, et al.: Coding algorithms for defining comorbidities in ICD-9-CM and ICD-10 administrative data. Med Care 2005,43(11):1130–1139. 10.1097/01.mlr.0000182534.19832.83
Charlson ME, Pompei P, Ales KL, MacKenzie CR: A new method of classifying prognostic comorbidity in longitudinal studies: development and validation. J Chronic Dis 1987,40(5):373–383. 10.1016/0021-9681(87)90171-8
Welch BL: The generalization of “Student”s“ problem when several different population variances are involved”. Biometrika 1947,34(1–2):28–35.
Hosmer DW, Lemeshow S: Applied Logistic Regression. New York: Wiley; 2000.
Davison AG, Fayers PM, Nunn AJ, Venables KM, Taylor AJ: Number of patients required in lung function studies. Thorax 1986,41(11):830–832. 10.1136/thx.41.11.830
Bryant C, Jackson H, Ames D: The role of physical and psychological variables in predicting the outcome of hospitalization in very old adults. Arch Gerontol Geriatr 2011,53(2):146–151. 10.1016/j.archger.2010.11.023
Giles LC, Hawthorne G, Crotty M: Health-related quality of life among hospitalized older people awaiting residential aged care. Health Qual Life Outcomes 2009, 7: 71. 10.1186/1477-7525-7-71
Kazis LE, Anderson JJ, Meenan RF: Effect sizes for interpreting changes in health status. Med Care 1989,27(3 Suppl):S178-S189.
Adams G, Gulliford MC, Ukoumunne OC, Eldridge S, Chinn S, Campbell MJ: Patterns of intra-cluster correlation from primary care research to inform study design and analysis. J Clin Epidemiol 2004,57(8):785–794. 10.1016/j.jclinepi.2003.12.013
Hsieh F: Sample size formulae for intervention studies with the cluster as unit of randomization. Stat Med 1988, 8: 1195–1201.
IBM SPPS Statistical Software. http://www-01.ibm.com/software/analytics/spss/
Stata Statistisical Software, StatCorp LB. Texas, USA. http://www.stata.com
Harris A, Gospodarevskaya E, Callaghan J, Story I: The cost effectiveness of a pharmacist reviewing medication among the elderly in the community. Australian Journal on Ageing 2001,20(4):179–2001. 10.1111/j.1741-6612.2001.tb00383.x
Foley A, Hillier S, Barnard R: Effectiveness of once-weekly gym-based exercise programmes for older adults post discharge from day rehabilitation: a randomised controlled trial. Br J Sports Med 2011,45(12):978–986. 10.1136/bjsm.2009.063966
Lim WK, Lambert SF, Gray LC: Effectiveness of case management and post-acute services in older people after hospital discharge. Med J Aust 2003,178(6):262–266.
Hu TW, Wagner TH, Hawthorne G, Moore K, Subak LL, Versi E: Economics of incontinence. In Incontinence: 3rd International Consultation, Volume 1: Basics and Evaluation. Edited by: Facey V, Abrams P, Cardozo L, Khoury S. Paris: Organisation of Medical Consultations & Edition 21; 2005:73–97.
Holland R, Smith R, Harvey I, Swift L, Lenaghan E: Assessing quality of life in the elderly: a direct comparison of the EQ-5D and AQoL. Health Econ 2004,13(8):793–805.23. 10.1002/hec.858
Hawthorne G, Richardson J, Day NA: A comparison of the Assessment of Quality of Life (AQoL) with four other generic utility instruments. Ann Med 2001,33(5):358–370. 10.3109/07853890109002090
Nikmat A, Hawthorne G, Almashoor SH: The comparison of quality of life among people with mild dementia in nursing home and home care – a preliminary report. Dementia: The International Journal of Social Research and Practice 2012. In press
McDermid RC, Bagshaw SM: ICU and critical care outreach for the elderly. Best Pract Res Clin Anaesthesiol 2011,25(3):439–449. 10.1016/j.bpa.2011.06.001
White SM, Wojcicki TR, McAuley E: Physical activity and quality of life in community dwelling older adults. Health Qual Life Outcomes 2009, 7: 10. 10.1186/1477-7525-7-10
Puts MT, Shekary N, Widdershoven G, Heldens J, Lips P, Deeg DJ: What does quality of life mean to older frail and non-frail community-dwelling adults in the Netherlands? Qual Life Res 2007,16(2):263–277. 10.1007/s11136-006-9121-0
Hellstrom Y, Persson G, Hallberg IR: Quality of life and symptoms among older people living at home. J Adv Nurs 2004,48(6):584–593. 10.1111/j.1365-2648.2004.03247.x
Kalfoss M, Halvorsrud L: Important issues to quality of life among Norwegian older adults: an exploratory study. Open Nursing Journal 2009, 3: 45–55.
Molzahn A, Skevington SM, Kalfoss M, Makaroff KS: The importance of facets of quality of life to older adults: an international investigation. Qual Life Res 2010,19(2):293–298. 10.1007/s11136-009-9579-7
Albrecht GL, Devlieger PJ: The disability paradox: high quality of life against all odds. Soc Sci Med 1999, 48: 977–988. 10.1016/S0277-9536(98)00411-0
Bilotta C, Bowling A, Case A, Nicolini P, Mauri S, Castelli M, et al.: Dimensions and correlates of quality of life according to frailty status: a cross-sectional study on community-dwelling older adults referred to an outpatient geriatric service in Italy. Health Qual Life Outcomes 2010, 8: 56. 10.1186/1477-7525-8-56
Bilotta C, Bowling A, Nicolini P, Case A, Pina G, Rossi SV, Vergani C: Older People’s Quality of Life (OPQOL) and adverse health outcomes at a one-year follow-up. A prospective cohort study on older outpatients living in the community in Italy. Health Qual Life Outcomes 2011, 9: 72. 10.1186/1477-7525-9-72
Shim EU, Ma SH, Hong SH, Lee YS, Paik WY, Seo DS, et al.: Correlation between frailty level and adverse health-related outcomes of community-dwelling elderly, one year retrospective study. Korean Journal of Family Medicine 2011,32(4):249–256. 10.4082/kjfm.2011.32.4.249
Bowling A, Grundy E: Differentials in mortality up to 20 years after baseline interview among older people in East London and Essex. Age & Ageing 2009, 38: 51–55.
This project was funded by the Department of Health (Victoria), Australia through the Northern Alliance Hospital Admission Risk Program. We thank the Northern Alliance Hospital Admission Risk Program – Complex Needs service clinicians who were the primary data collectors for the service, and Andrea Jasper & Chrissie Risteski who were the data managers for this project.
The authors declare that they have no competing interests.
AH was involved in study implementation and data management, data analysis and manuscript preparation, TMR was involved in data management and analysis, DJB, MG & WKL contributed to study design and manuscript prepartion. GH contributed to study design, data analysis and manuscript preparation. All authors read and approved the final manuscript.