Table 3.

Adjusted Association Between Pain and Functional Limitations in Subjects with and without Arthritis

Functional Limitation Measure	Adjusted for Demographic Characteristics		Interaction P-Value	Adjusted for All Characteristics*		Interaction P-Value
	No Arthritis	Arthritis		No Arthritis	Arthritis
	OR (95% CI)			OR (95% CI)
Mobility	4.61 (3.53–6.02)	4.19 (3.20–5.48)	.64	3.24 (2.24–4.67)	2.53 (1.82–3.51)	.34
Stair climbing‡	4.88 (3.86–6.18)	3.82 (3.45–4.24)	.12	3.78 (2.83–5.04)	2.48 (2.14–2.88)	.02
Upper extremity tasks§	6.49 (5.14–8.19)	4.65 (4.17–5.19)	.05	5.66 (4.23–7.58)	3.43 (2.96–3.99)	.02
Activities of daily living¶	10.77 (8.07–14.35)	4.74 (4.18–5.39)	< .001	9.18 (6.19–13.61)	3.54 (3.02–4.14)	< .001

^*Demographics, socioeconomic status, comorbid conditions, depression, obesity, and health habits.

^†Dichotomized as difficulty versus no difficulty walking one block.

^‡Dichotomized as difficulty versus no difficulty climbing one flight of stairs.

^§Dichotomized as able to do 2 or more without difficulty versus able to do 1 or 0.

^¶Dichotomized as difficulty (difficulty or dependence) versus no difficulty.

OR = odds ratio; CI = confidence interval.