Figure 2.

Adjusted mean difference in unhealthy days and days with activity limitation in people with a chronic condition, with and without arthritis. Results were adjusted for age, sex, dual Medicare/Medicaid eligibility, rural/urban commuting area, and Charlson Comorbidity Index. Asterisks in figure indicate significant differences in regression-adjusted means between the arthritis and nonarthritis groups at P < .001; error bars indicate 95% confidence intervals. Abbreviations: CAD, coronary artery disease; CHF, congestive heart failure; COPD, chronic obstructive pulmonary disease; HTN, hypertension; MUHD, mentally unhealthy days; PUHD, physically unhealthy days; UHD, unhealthy days.

Condition	Adjusted Mean No. (95% Confidence Interval)		P Value
	No Arthritis	Arthritis
Hypertension
Activity limitation	5.2 (4.3–6.1)	6.7 (5.8–7.6)	<.001
MUHD	5.5 (4.6–6.4)	6.0 (5.2–6.8)	<.001
PUHD	8.3 (7.4–9.2)	10.4 (9.5–11.3)	<.001
UHD	11.3 (10.3–12.3)	13.6 (12.6–14.6)	<.001
Diabetes
Activity limitation	5.2 (4.2–6.2)	7.1 (6.0–8.2)	<.001
MUHD	5.3 (4.3–6.3)	6.1 (5.2–7.0)	<.001
PUHD	9.5 (8.2–10.8)	11.6 (10.4–12.8)	<.001
UHD	12.4 (11.0–13.8)	14.7 (13.4–16.0)	<.001
Chronic obstructive pulmonary disease
Activity limitation	5.9 (5.0–6.8)	7.2 (6.4–8.0)	<.001
MUHD	4.9 (4.1–5.7)	5.7 (5.0–6.4)	.01
PUHD	10.3 (8.6–12.0)	12.3 (10.6–14.0)	<.001
UHD	13.2 (11.4–15.0)	15.5 (13.7–17.3)	<.001
Congestive heart failure
Activity limitation	4.6 (3.4–5.8)	6.5 (5.3–7.7)	<.001
MUHD	3.8 (2.9–4.7)	5.0 (4.1–5.9)	.003
PUHD	10.5 (8.0–13.0)	13.0 (10.4–15.6)	<.001
UHD	12.9 (10.3–15.5)	15.7 (13.1–18.3)	<.001
Coronary artery disease
Activity limitation	6.5 (4.8–8.2)	7.8 (6.1–9.5)	<.001
MUHD	6.9 (5.0–8.8)	7.3 (5.4–9.2)	.15
PUHD	10.7 (9.2–12.2)	12.4 (10.8–14.0)	<.001
UHD	14.5 (12.9–16.1)	16.2 (14.6–17.8)	<.001