Skip to main content

Table 1 Baseline patient characteristics

From: Vitamin D and early rheumatoid arthritis

 AllRAUIACSAOther
No. patients790368139169114
Age*, years mean (SD)52.4 (15.5)55.5 (15.2)51.4 (15.4)46.3 (13.7)52.3 (16.5)
Missing (no.)n = 0n = 0n = 0n = 0n = 0
Sex, % female64.368.859.072.843.9
Missing (no.)n = 0n = 0n = 0n = 0n = 0
Ethnicity,%
 White British60.758.259.760.471.1
 White Other4.74.63.66.63.5
 Asian or Asian British20.420.422.321.915.8
 Black or Black British7.89.010.84.85.3
 Other2.72.82.83.60.9
Missing or not stated (no.)n = 27n = 18n = 1n = 4n = 4
Smoking status, %
 Current19.920.518.721.318.4
 Previous31.529.934.528.437.8
 Never47.249.245.349.743.2
 Missing (no.)n = 8n = 2n = 2n = 1n = 3
BMI, kg/m2 mean (SD)28.7 (6.4)28.7 (6.5)28.0 (5.6)28.9 (7.1)29.5 (6.1)
Missing (no.)n = 41n = 24n = 5n = 8n = 4
Symptom duration*,days median (IQR)26.0 (13.3–54.4)24.1 (13.0–52.2)24.1 (13.0–57.0)34.0 (18.0–70.1)25.7 (10.5–55.7)
Missing (no.)n = 12n = 7n = 1n = 2n = 2
  1. C current, CSA clinically suspect arthralgia, N never, no. number of cases, P previous, RA rheumatoid arthritis, SD standard deviation, UIA unclassified inflammatory arthritis
  2. * denotes statistically significant difference between groups (p < 0.001, Kruskall Wallis test)