Table 1

Baseline demographic and laboratory characteristics of patients with RA included in this data set

Patient characteristicsNeutropaenic
n=58
Non–neutropaenic
n=713
P values
Demographic
 Age,* mean±SD57.7±14.158.8±13.40.538
 Female gender, n (%)47 (81.0)460 (64.5)0.010
 Total follow-up (months), median (range)18 (6–48)18 (6–48)0.139
 Smoking, n (%)6 (10.3)188 (26.4)0.007
 Alcohol consumption, n (%)40 (69.0)421 (57.9)0.127
Laboratory
 Anaemia,† n (%)7/55 (12.7)142/702 (20.2)0.218
 Thrombocytopaenia,‡ n (%)0/55 (0.0)0/702 (0.0)1.000
 Leucopaenia,§ n (%)1/55 (1.8)3/702 (0.4)0.261
 Lymphopaenia,¶ n (%)4/55 (7.2)40/702 (5.7)0.520
 Neutrophils number, mean±SD (×10^9/L)**4.29±2.125.89±2.15<0.0001
 RF-positive, n (%)27/35 (77.1)284/428 (67.1)0.262
 Anti-CCP-positive, n (%)35/46 (74.4)410/587 (69.8)0.620
 Baseline DAS28, mean±SD4.76±1.515.04±1.380.310
  • *Age at the time of RA diagnosis.

  • †Haemoglobin <135 g/L for men and haemoglobin <120 g/L for women.

  • ‡Platelets <100×10^9/L

  • §White cell count: <4×109/L.

  • ¶Lymphocytes: <1×109/L.

  • **n=53 (5 patients had neutropaenia at baseline).

  • CCP, Cyclic Citrullinated Peptide; DAS28, Disease Activity Score in 28 joints; RA, rheumatoid arthritis; RF, rheumatoid factor.