Table 4.

Linear regression analysis with SEFAS (0‐48; worst to best) as the dependent variable

	Model 1				Model 2
	R Value	β‐est	95% CI	P Value	β‐est	95% CI	P Value
Sex (male =1, female= 0)	‐	‐	‐	‐	−0.950	−3.224 to 1.325	0.411
Age, yr	‐	‐	‐	‐	0.031	−0.045 to 0.107	0.442
Disease duration, yr	0.22	0.000003	−0.01 to 0.01	1	0.0002	−0.008 to 0.008	0.943
HAQ a	0.68	−9.052	−10.431 to −7.673	<0.001	−3.634	−5.681 to −1.587	0.002
Physician‐reported global health b	0.46	−0.276	−0.356 to −0.195	<0.001	−0.066	−0.164 to 0.031	0.18
DAS28 c	0.54	−3.958	−4.842 to −3.074	<0.001	−0.515	−1.733 to 0.702	0.405
Swollen 12‐joint count	0.29	−1.543	−2.642 to −0.445	0.006	0.685	−0.335 to 1.675	0.174
Tender 12‐joint count	0.40	−1.037	−1.413 to −0.661	<0.001	−0.345	−0.707 to 0.017	0.061
3‐km walk	0.67	−5.691	−6.612 to −4.771	<0.001	−2.733	−3.963 to − 1.503	<0.001
Sport and recreational activities	0.60	−4.855	−5.794 to −3.916	<0.001	−1.290	−2.438 to −0.142	0.028

β‐est, estimated β; CI, confidence interval; HAQ, Health Assessment Questionnaire; DAS28, Disease Activity Score 28; SEFAS, self‐reported foot and ankle score.

Model 1 = one independent variable at a time controlled for age and sex. Model 2 = all variables included; age and sex are entered into the same model.

^aScored from 0 to 3 (best to worst).

^bGlobal health, pain, and fatigue visual analog scale is measured from 0 mm to 100 mm (best to worst).

^cThe 28‐joint disease activity score scored from 0.96 to 9.4 (best to worst).