Table 1

Baseline demographics of patients with RA and PsA

RA
n=2735
PsA
n=1236
p Value
Age (years), mean (SD)55.0 (13.5)48.3 (12.4)<0.001
Female, n/total (%)1896/2722 (69.7)595/1230 (48.4)<0.001
Disease duration (years), median (25th, 75th percentile)0.7 (0.02, 6.4)1.3 (0.09, 7.7)<0.001
Currently smoking, n/total (%)859/2711 (31.7)364/1223 (29.8)0.23
Joint pain, mean (SD)47.0 (25.1)47.8 (22.7)0.34
32 tender joints, median (25th, 75th percentile)8 (4, 14)5 (2, 10)<0.001
32 swollen joints, median (25th, 75th percentile)7 (3, 12)3 (1, 6)<0.001
32 ΔTSJ, median (25th, 75th percentile)1 (–1, 4)1 (0, 5)<0.001
EGA, mean (SD)40.3 (19.4)34.1 (16.6)<0.001
PGA, mean (SD)49.7 (24.8)51.1 (22.6)0.08
ΔPEG, mean (SD)9.4 (25.0)17.0 (24.3)<0.001
DAS28, mean (SD)5.0 (1.4)4.2 (1.3)<0.001
DAS28CRP, mean (SD)4.7 (1.3)4.0 (1.1)<0.001
SDAI, median (25th, 75th percentile)24.5 (15.7, 35.3)16.9 (11.8, 24.6)<0.001
CDAI, median (25th, 75th percentile)22.1 (14.1, 32.4)15.2 (10.7, 22.6)<0.001
MHAQ, median (25th, 75th percentile)0.6 (0.3, 1.0)0.6 (0.3, 0.9)0.01
Modified DAPSA, median (25th, 75th percentile)28.2 (18.6, 39.9)21.0 (14.4, 28.4)<0.001
ESR, mm/h, median (25th, 75th percentile)22 (12, 40)17 (8, 29)<0.001
CRP, mg/L, median (25th, 75th percentile)11 (5, 28)7.5 (4, 19)<0.001
  • CDAI, Clinical Disease Activity Index; CRP, C reactive protein in mg/L; DAPSA, Disease Activity Index for PsA; DAS28, 28 joint disease activity score; EGA, evaluator's global assessment on a 0–100 VAS scale; ESR, erythrocyte sedimentation rate in mm/h; MHAQ, Modified Health Assessment Questionnaire; PGA, patient's global assessment on a 0–100 VAS scale; PsA, psoriatic arthritis; RA, rheumatoid arthritis; SDAI, Simplified Disease Activity Index; ΔPEG, patient's and evaluator's global assessment difference; ΔTSJ, tender and swollen joint count difference; VAS, visual analogue scale.