Table 4.

Interval regression results to predict MAR (N=289)

Treatment risks		Mild side effect		Serious infection		Serious side effect
		Coefficient	SE	Coefficient	SE	Coefficient	SE
Mean MAR (%)		21.73	4.38	8.93	1.81	−0.28	0.80
Age	18–60	2.66	1.94	2.06	0.78	0.44	0.36
	60 or over	−2.66	1.94	−2.06	0.78	−0.44	0.36
Education	Below graduate	−0.37	1.68	−0.51	0.67	0.22	0.31
	Graduate or above	0.37	1.68	0.51	0.67	−0.22	0.31
Health literacy	Low	−1.72	3.81	0.81	1.60	−0.51	0.70
	High	1.72	3.81	−0.81	1.60	0.51	0.70
Subjective numeracy	Low	−0.69	2.25	0.81	0.89	−0.21	0.40
	High	0.69	2.25	−0.81	0.89	0.21	0.40
Brief Illness Perception Questionnaire subscales	Consequences −	−1.58	2.01	1.31	0.80	−0.13	0.37
	Consequences +	1.58	2.01	−1.31	0.80	0.13	0.37
	Timeline −	−4.44	2.20	−0.19	0.87	−0.01	0.40
	Timeline +	4.44	2.20	0.19	0.87	0.01	0.40
	Personal control −	−1.35	1.66	−0.41	0.65	−0.34	0.30
	Personal control +	1.35	1.66	0.41	0.65	0.34	0.30
	Treatment control −	1.72	1.59	0.47	0.62	0.03	0.29
	Treatment control +	−1.72	1.59	−0.47	0.62	−0.03	0.29
	Identity −	1.55	1.66	−0.82	0.66	−0.24	0.30
	Identity +	−1.55	1.66	0.82	0.66	0.24	0.30
	Concern −	0.71	1.92	−1.41	0.76	−0.38	0.35
	Concern +	−0.71	1.92	1.41	0.76	0.38	0.35
	Coherence −	0.34	1.56	−0.15	0.61	−0.35	0.28
	Coherence +	−0.34	1.56	0.15	0.61	0.35	0.28
	Emotion −	−0.59	1.71	−0.09	0.68	0.20	0.31
	Emotion +	0.59	1.71	0.09	0.68	−0.20	0.31
Beliefs about Medicines Questionnaire-General subscales	Harm −	−2.03	1.67	0.00	0.66	−0.26	0.30
	Harm +	2.03	1.67	0.00	0.66	0.26	0.30
	Overuse −	1.37	1.63	0.44	0.64	0.31	0.29
	Overuse +	−1.37	1.63	−0.44	0.64	−0.31	0.29
Perceived risk of RA	Very unlikely/unlikely/neutral	3.34	1.55	0.22	0.61	0.09	0.28
	Likely/very likely	−3.34	1.55	−0.22	0.61	−0.09	0.28

Boldface values denote estimated coefficients that are significant at the 5% level.

−, below median; +, above median.

MAR, maximum acceptable risk; RA, rheumatoid arthritis.