Table 3

DAS28 parameters at baseline and at 3-month follow-up visit for RA patients in the Swedish Rheumatology Quality Register (SRQ), 2006–2016

Patients with complete information at 3-month follow-up visit (n=4 831)
Baseline3-Month follow-up visit
AITD+(n=530)AITD− (n=4 301)Mean difference Estimate(β)95% CIAITD+AITD−Mean difference Estimate(β)95% CI
Patient global, mean±SD57.0±25.252.2± to 5.9529.5±23.628.5±24.00.39−1.79 to 2.57
ESR, mean±SD34.4±24.632.7±24.00.12−2.01 to 2.2619.5±16.417.6±15.30.63−0.74 to 2.00
SJC, mean±SD7.9±5.58.0±5.5−0.08−0.58 to 0.422.3±3.32.2±3.20.05−0.24 to 0.35
TJC, mean±SD7.9±5.77.5±5.90.31−0.22 to 0.853.0±4.52.6±4.00.32−0.05 to 0.69
DAS28, mean±SD5.2±1.35.1±1.30.10−0.02 to 0.223.3±1.33.1±1.30.07−0.06 to 0.19
HAQ, mean±SD1.2±0.61.0± to 0.130.6±0.60.5±0.50.02−0.03 to 0.07
VAS pain, mean±SD57.7±25.753.2±25.23.791.48 to 6.1028.3±24.726.9±23.81.06−1.11 to 3.23
  • For each of the seven variables named in the first column and for each time point, the estimate (β) was provided by a linear regression model for which the variable in the first column was the dependent variable, AITD the independent variable, and age and sex used as adjustment. The estimate β gives the mean difference (given the linear model) between the two types of patients, a positive value meaning that the AITD+ patients have on average a higher value than the AITD− patients.

  • AITD, autoimmune thyroid disease; DAS28, 28-joint Disease Activity Score; ESR, erythrocyte sedimentation rate; HAQ, Health Assessment Questionnaire; RA, rheumatoid arthritis; SJC, swollen joint count; TJC, tender joint count; VAS, Visual Analogue Scale.