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Table 1 Baseline characteristics for patients with rheumatoid arthritis and information from EIRA (1996–2015) and SRQ (n=2820)

From: Neither low social support nor low decision latitude at work is associated with disease remission among patients with rheumatoid arthritis: results from the Swedish EIRA study

  All cases, n=2820 Subgroup with data on social support, n=2800 Subgroup with data on decision latitude at work, n=847a
   Low social support, n = 591 Not low social support, n = 2209 Low decision latitude at work, n = 212 Not low decision latitude at work, n = 635
Age (years), median (IQR) 55 (44–62) 56 (46–63) 55 (43–62) 51 (41–57) 52 (42–57)
Female sex,n(%) 2001 (71.1) 427 (72.3) 1563 (70.8) 151 (71.6) 431 (67.9)
RF pos,n(%) 1796 (63.9) 374 (63.7) 1406 (63.8) 137 (64.9) 429 (67.6)
ACPA pos,n(%) 1804 (65.3) 380 (65.4) 1408 (65.2) 138 (66.7) 427 (68.1)
Symptom duration (months), median (IQR) 5.8 (3.6–9.4) 5.8 (3.5–9.5) 5.8 (3.6–9.4) 6.0 (4.1–8.9) 5.9 (3.7–8.9)
Low social support,n(%) 591 (21.0) - - 50 (23.7) 103 (16.2)
Low decision latitude at work,n(%)a 211 (25.0) 50 (32.7) 161 (23.2) - -
DAS28-CRP, median (IQR) 4.9 (4.2–5.7) 5.0 (4.3–5.8) 4.9 (4.1–5.6) 5.1 (4.3–5.9) 5.0 (4.3–5.7)
HAQ-score, median (IQR) 1.00 (0.63–1.38) 1.00 (0.75–1.50) 1.00 (0.50–1.38) 1.00 (0.63–1.38) 1.00 (0.50–1.38)
VAS pain, median (IQR) 51 (32–70) 55 (35–75) 51 (32–69) 50 (33–68) 49 (29–66)
VAS global, median (IQR) 51 (30-69) 55 (35-75) 50 (29–68) 51 (29–69) 49 (27–68)
CRP, median (IQR) 12 (6–29) 12 (6–29) 12 (6–28) 14 (8–29) 15 (8–31)
Swollen joint count (SJC), median (IQR) 8 (5–12) 8 (5–13) 8 (5–12) 9 (5–14) 9 (5–12)
Tender joint count (TJC), median (IQR) 7 (4–12) 8 (4–12) 7 (3–12) 8 (4–13) 8 (4–12)
Ever smoking,n(%) 1802 (66.4) 408 (71.1) 1380 (65.1) 153 (72.5) 430 (67.7)
University degree,n(%) 701 (25.9) 100 (17.4) 598 (28.2) 29 (13.7) 225 (35.4)
Ever drinker,n(%) 2442 (90.3) 491 (86.0) 1937 (91.5) 187 (88.6) 581 (91.5)
  1. Missing data: RF, n = 10 (0.4%); ACPA, n = 59 (2.1%); symptom duration, n = 112 (4.0%); social support, n = 20 (0.7%); DAS 28-CRP, n = 195 (6.9%); HAQ, n = 180 (6.4%); VAS pain, n = 141 (5.0%); VAS global, n = 130 (4.6%); CRP, n = 62 (2.2%); SJC, n = 58 (2.1%); TJC, n = 57 (2.0%); ever smoking, n = 107 (3.8%); educational level, n = 108 (3.8%); alcohol habits, n = 115 (4.1%)
  2. aInformation on occupational conditions only available in EIRA 1 (n = 1998) which was run 1996–2006