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Table 3 Regression model results in the full sample

From: Physical activity as a mediator of the impact of chronic conditions on quality of life in older adults

  Dependent variables
Variables HUI total score
b(se)
Mobility
OR (95% CI)
Pain
OR (95% CI)
Emotion
OR (95% CI)
Physical activity
OR (95% CI)
Physical activity (referent = ≥ 1,000 Kcal/week)      
   < 1,000 Kcal/week -0.07 (0.00) 3.6 (4.3 – 3.0) 1.5 (1.7 – 1.3) 2.2 (1.6 – 3.0) -
Age (referent = 65 – 74 yrs)      
   75 – 84 yrs -0.04 (0.01) 2.0 (1.8 – 2.4) 1.0 (0.9 – 1.2) 1.1 (0.8 – 1.5) 1.6 (1.4 – 1.9)
   > 84 yrs -0.12 (0.01) 4.9 (4.2 – 5.6) 1.1 (1.0 – 1.2) 1.3 (1.0 – 1.6) 2.3 (2.0 – 2.6)
Sex (referent = male)      
   Female 0.02 (0.01) 0.9 (0.8 – 1.0) 1.3 (1.2 – 1.4) 0.9 (0.7 – 1.1) 2.3 (2.1 – 2.6)
Smoking status (referent = does not smoke)      
   Smokes daily or occasionally -0.04 (0.01) 1.5 (1.2 – 1.8) 1.2 (1.1 – 1.4) 1.8 (1.4 – 2.3) 2.0 (1.7 – 2.3)
Alcohol use (referent = does not use alcohol)      
   Less than two times/month 0.03 (0.01) 0.9 (0.8 – 1.0) 0.9 (0.8 – 1.0) 0.7 (0.5 – 1.0) 0.8 (0.7 – 1.0)
   Two or three times/month 0.06 (0.01) 0.6 (0.5 – 0.7) 0.8 (0.6 – 0.9) 0.5 (0.3 – 0.8) 0.7 (0.6 – 0.8)
   Four or more times/month 0.07 (0.01) 0.6 (0.5 – 0.7) 0.7 (0.6 – 0.8) 0.4 (0.3 – 0.6) 0.6 (0.5 – 0.6)
Obesity (referent = between 18.5 and 25)      
   Less than 18.5 -0.06 (0.02) 1.6 (1.2 – 2.2) 1.4 (1.1 – 1.8) 2.1 (1.4 – 3.2) 3.7 (2.6 – 5.4)
   More than or equal to 25 -0.01 (0.00) 1.5 (1.3 – 1.7) 1.2 (1.1 – 1.3) 0.9 (0.8 – 1.2) 1.0 (0.9 – 1.1)
Chronic condition(s) (referent = no chronic conditions)      
   One or more chronic conditions -0.13 (0.00) 5.1 (3.8 – 7.0) 7.6 (5.7 – 10.1) 4.0 (2.5 – 6.3) 1.3 (1.2 – 1.5)
   Indirect effect1 -0.02 (0.01) 1.4 (1.2 – 1.7) 1.1 (1.1 – 1.2) 1.2 (1.1 – 1.2) -
   % mediated by physical activity2 14% 18% 5% 13% -
R2 (LR R2) 12% (15%) (6%) (6%) (8%)
Likelihood ratio chi-square (Df = 11) n/a 2,358.59 1,444.94 423.90 1,878.80
  1. Notes: N = 19,953, including those older adults who had no chronic conditions or one of the selected chronic conditions and for whom there was no missing data for any of the variables in our analyses. Only the results for the HUI3 attributes with statistically significant indirect effects (p < 0.01) are shown. The reference groups for mobility, pain, and emotion are the same as in Table 2.
  2. 1 The indirect effect of having a chronic condition versus no chronic condition as mediated by physical activity.
  3. 2 Percentage of the total effect of having a chronic condition that is attributed to the mediating role of physical activity after controlling for the covariates (based on the unexponentiated regression weights).