Table 4

Changes in DAS28 parameters from baseline to 3-month and 6-month follow-up visit, among RA patients in the Swedish Rheumatology Quality Register (SRQ)

Patients with complete information at 3-month follow-up (n=4 831)Patient with complete information at 6-month follow-up (n=4 010)
AITD+ n=530AITD− n=4 301Mean difference Estimate (β)95% CIP valueAITD+ n=441AITD− n=3 569Mean difference Estimate (β)95% CIP value
Δpatient global, mean±SD27.6 (29.1)23.7 (29.2)3.230.55 to 5.900.01822.0 (32.6)20.9 (30.2)0.77−2.31 to 3.850.6255
ΔESR, mean±SD15.0 (22.1)15.1 (21.1)−0.51−2.44 to 1.420.606114.2 (19.5)15.2 (21.7)−1.57−3.73 to 0.580.1531
ΔSJC, mean±SD5.6 (5.7)5.8 (5.5)−0.13−0.63 to 0.370.61435.9 (6.0)5.9 (5.8)−0.02−0.60 to 0.570.6255
ΔTJC, mean±SD4.8 (6.0)4.8 (5.9)−0.01−0.55 to 0.530.97424.6 (6.1)4.8 (6.0)−0.22−0.83 to 0.390.4836
ΔDAS28, mean±SD2.0 (1.6)2.0 (1.5)0.04−0.10 to 0.170.6171.9 (1.6)2.0 (1.6)−0.05−0.21 to 0.120.5626
ΔHAQ, mean±SD0.5 (0.6)0.5 (0.6)0.030.00 to 0.110.04100.5 (0.7)0.5 (0.6)0.04−0.03 to 0.100.2322
ΔVAS pain, mean±SD29.4 (32.1)26.3 (29.4)2.60−0.13 to 5.330.062423.8 (33.4)22.9 (30.5)0.85−2.27 to 3.970.5932
  • 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) shows how differently the two types of patients were evolving between baseline and 3/6 months. For a given variable in the first column, a positive value means that the AITD+ patients have on average evolved (decreased) more 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.