Table 1.

Clinical findings at the first rheumatological evaluation.

VariablesSeronegative RA, n = 23Seropositive RA, n = 25PsA, n = 25
Male, n (%)3 (13.0)12 (48.0)14 (56.0)
Age, yrs, mean ± SD53.4 ± 14.754.0 ± 16.552.4 ± 9.3
BMI, mean ± SD24.3 ± 4.623.2 ± 2.825.8 ± 2.1
Smoke, yes, n (%)3 (13.0)5 (20.0)1 (4.0)
Total tender joints/68, mean ± SD13.1 ± 3.96.9 ± 4.15.8 ± 2.5
Total swollen joints/66, mean ± SD4.9 ± 3.04.4 ± 3.73.2 ± 2.2
CRP, mg/dl, median (range)0.4 (0.1–5.3)0.3 (0.1–1.5)0.3 (0.1–0.5)
RF+, n (%)022 (88.0)0
ACPA+, n (%)022 (88.0)0
ACR/EULAR criteria for RA points, mean ± SD6.3 ± 0.57.4 ± 1.3NA
  • RA: rheumatoid arthritis; PsA: psoriatic arthritis; BMI: body mass index; CRP: C-reactive protein; RF: rheumatoid factor; ACPA: anticitrullinated protein antibodies; ACR/EULAR: 2010 American College of Rheumatology/European League Against Rheumatism; NA: not applicable.