Table 5.

Adjusted analysis of health‐related quality of life between RA and non‐RA groups, Medical Expenditure Panel Survey, 2018 to 2020^*

Health‐related quality of life	Adjusted marginal difference a		P value
	Parameter estimate	95% CI
SF‐12 PCS
RA status
Yes	−4.78	−6.09 to −3.47	<0.0001
No	1 (reference)
SF‐12 MCS
RA status
Yes	−0.84	−2.19 to 0.50	0.2164
No	1 (reference)
ADL
RA status
Yes	2.02 b	1.59 to 2.56	<0.0001
No	1 (reference) b
IADL
RA status
Yes	2.11 b	1.57 to 2.84	<0.0001
No	1 (reference) b

^*ADL includes activities for independent self‐care (such as walking, dressing, eating, and bathing). IADL includes mental skills required to live within the community, such as shopping and medication management, using the phone, paying bills, and doing housework. Significance at P < 0.05 has been bolded. ADL, activities of daily living; aOR, adjusted odds ratio; CI, confidence interval; IADL, instrumental activities of daily living; MCS, mental component summary; PCS, physical component summary; RA, rheumatoid arthritis; SF‐12, Short Form 12.

^a Calculated using ordinary least square methods.

^b Values are aORs, calculated using multivariable logistic regression models.