Higher education is associated with a better rheumatoid arthritis outcome concerning for pain and function but not disease activity: results from the EIRA cohort and Swedish rheumatology register

Table 3 Risk ratios and 95 % confidence intervals for the association between educational level and having outcome measures of rheumatoid arthritis above the median

Visits	University/college degree	Outcome values above the median
Visits	University/college degree	No	Yes	Risk ratio, crude (95 % CI)	Risk ratio* (95 % CI)
DAS28
3 months	No	860 (74.7)	291 (25.3)	1.0 ref.	1.0 ref.
3 months	Yes	889 (76.6)	272 (23.4)	0.95 (0.86 to 1.05)	0.99 (0.90 to 1.09)
6 months	No	762 (77.0)	227 (23.0)	1.0 ref.	1.0 ref.
6 months	Yes	776 (78.4)	214 (21.6)	0.96 (0.86 to 1.07)	1.01 (0.90 to 1.13)
1 year	No	975 (75.6)	314 (24.4)	1.0 ref.	1.0 ref.
1 year	Yes	1007 (77.4)	294 (22.6)	0.95 (0.87 to 1.04)	0.98 (0.89 to 1.08)
VAS-pain
3 months	No	817 (72.1)	316 (27.9)	1.0 ref.	1.0 ref.
3 months	Yes	948 (79.3)	247 (20.7)	0.82 (0.74 to 0.91)	0.88 (0.79 to 0.98)
6 months	No	751 (75.3)	246 (24.7)	1.0 ref.	1.0 ref.
6 months	Yes	804 (80.3)	197 (19.7)	0.86 (0.77 to 0.96)	0.93 (0.82 to 1.05)
1 year	No	947 (72.9)	352 (27.1)	1.0 ref.	1.0 ref.
1 year	Yes	1058 (80.0)	264 (20.0)	0.81 (0.73 to 0.90)	0.85 (0.76 to 0.94)
HAQ
3 months	No	743 (71.8)	292 (28.2)	1.0 ref.	1.0 ref.
3 months	Yes	986 (79.1)	261 (20.9)	0.83 (0.75 to 0.91)	0.90 (0.82 to 0.99)
6 months	No	689 (75.1)	229 (24.9)	1.0 ref.	1.0 ref.
6 months	Yes	827 (80.0)	207 (20.0)	0.87 (0.78 to 0.97)	0.93 (0.83 to 1.04)
1 year	No	817 (72.9)	304 (27.1)	1.0 ref.	1.0 ref.
1 year	Yes	1130 (79.5)	292 (20.5)	0.84 (0.77 to 0.92)	0.90 (0.82 to 0.98)

Risk ratio crude: poisson regression estimates without adjustment. Risk ratio*: poisson regression estimates adjusted for age at diagnosis, gender, alcohol assumption, pack-years of smoking, body mass index, and baseline outcome values. DAS28 disease activity in 29 joints, VAS visual analog scale

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