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Table 1 Characteristics of follow-up survey respondents and non-respondents at the time of diagnosis or the initial survey

From: Predictors of health-related quality of life in patients with colorectal cancer

Variable Type Variablea Evaluated Respondents (n= 496)b,c Assessment of Response Biasb
    Follow-up Survey Respondents ( n = 568) Follow-up Survey Non-Respondents ( n = 236) p -value d
Sociodemographic Age at diagnosis (years) [mean (SD)] 66.8 (10.4) 66.7 (10.5) 65.0 (12.1) 0.07
  Male 48.0 48.6 50.0 0.72
  Race/ethnicity     
     Non-Hispanic White 80.0 79.8 67.8 <0.001
     Non-Hispanic Black 5.7 5.6 14.0  
     Hispanic 7.5 7.0 9.3  
     Asian/Other 6.9 7.6 8.9  
  Married/Living as married 65.9 65.7 56.6 0.02
  Education     
     High school or less 38.1 38.2 44.0 0.30
     Post high school training/some college 30.7 31.1 27.8  
     College degree or higher 31.1 30.7 28.2  
  Working 28.6 28.8 29.7 0.80
  Household Income     
     Missing 8.9 10.2 11.9 <0.001
     Less than $25,000 22.4 23.1 36.0  
     $25,000 to $50,000 31.1 30.3 20.8  
     Over $50,000 37.7 36.4 31.4  
  Financial problems due to cancer     
     Not at all 76.6 77.2 66.4 0.01
     A little 10.9 10.2 16.4  
     Somewhat 7.3 7.1 11.2  
     A lot 5.0 5.5 6.0  
Cancer/Health-related Late Stage (Stage IV) 8.3 7.8 10.2 0.26
  General Health     
     Poor 5.0 5.3 5.1 0.21
     Fair 23.2 22.4 23.3  
     Good 38.7 38.2 41.1  
     Very Good 21.2 22.7 24.6  
     Excellent 11.9 11.4 5.9  
  Colostomy 14.5 14.5 15.7 0.67
  History of radiation therapy 15.3 17.4 19.4 0.51
  History of chemotherapy 51.6 49.2 42.0 0.07
  Receiving chemotherapy at time of initial survey 30.9 30.1 19.5 0.002
  Comorbidity Index [median (IQR)] 2 (1–4) 2 (1–4) 3 (1–4) 0.08
  Bowel Function [mean (SD)] 8.6 (2.3) 8.6 (2.3) 8.8 (2.4) 0.42
  Time since diagnosis [mean (SD)] 8.6 (1.7) 9.2 (2.6) 9.8 (3.1) 0.02
Healthcare Type of Insurance     
     Medicare 24.2 24.3 28.8 0.40
     Commercial Insurance 68.2 68.0 64.4  
     Other/none 7.7 7.8 6.8  
  Picker problem scores [mean, (SD)]     
     Psychosocial Care 30.6 (28.9) 30.7 (28.5) 32.4 (28.1) 0.45
     Access to Care 10.8 (22.5) 10.7 (22.4) 16.7 (26.9) 0.003
     Treatment Information 30.4 (30.7) 30.5 (30.9) 33.9 (33.6) 0.17
     Health Information 46.1 (33.6) 46.6 (33.6) 49.6 (35.7) 0.25
     Confidence in Providers 11.7 (20.6) 11.8 (21.4) 15.5 (26.7) 0.05
     Coordination of Care 19.4 (23.5) 19.0 (23.5) 24.4 (27.4) 0.008
  Control of Nausea/Vomiting (% somewhat/not at all) 11.3 10.9 14.0 0.22
  Control of Pain (% somewhat/not at all) 10.3 10.4 18.2 0.002
HRQL Initial HRQL scores [mean, (SD)]     
     TOI 66.6 (12.7) 66.9 (12.7) 64.6 (13.7) 0.02
     SWB 23.2 (4.4) 23.2 (4.6) 22.0 (5.1) 0.002
     EWB 20.4 (3.7) 20.4 (3.7) 19.6 (4.5) 0.02
  1. HRQL, Health-related Quality of Life; TOI, Trial Outcome Index-Colorectal; SWB, Social/family well-being; EWB, Emotional well-being; SD, standard deviation; IQR, interquartile range.
  2. aData for all variables were collected via self report in the initial survey except gender, stage at diagnosis and age, which were reported to the California Cancer Registry at the time of diagnosis.
  3. bNumbers represent percentages unless otherwise specified.
  4. cParticipants with non-overlapping survey periods who were evaluated in the regression analyses.
  5. dp-value for response bias at follow-up. Compares follow-up respondents (n = 568) and non-respondents (n = 236).