Table 4.

Results of multivariable logistic regression analysis for specific comorbidities

Comorbidity	Adjusted odds ratio	95 % CI
Arthritis	1.8***	1.3–2.4
Circulation trouble in arms or legs	1.6*	1.2–2.3
Stroke	2.4*	1.4–4.0
Depression	2.7***	1.9–3.7
High blood pressure	1.1	0.8–1.5
Diabetes	1.4	0.9–2.0
Heart disease	1.3	0.9–1.9
Number of comorbidities	1.2*	1.1–1.3

Each row presents the odds ratio from the multivariable model for each comorbidity, controlling for age, race, gender, education, and treatment stage

^*p≤0.05;

^**p≤0.001;

^***p≤0.0001