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Table 2 Demographics of the patients with GPA and controlsa

From: Association between environmental exposures and granulomatosis with polyangiitis in Canterbury, New Zealand

  GPA COPD index COPD interview OA index OA interview
(n = 49) (n = 49) (n = 49) (n = 49) (n = 49)
Age at interview (years) 64.9 (33–89)   65.1 (33–87)   65.1 (31–87)
Age at index date (years) 53.3 (20–81) 54.3 (23–83)   53.6 (22–81)  
Male 26 (53.1 %) 26 (53.1 %) 26 (53.1 %) 26 (53.1 %) 26 (53.1 %)
NZ European/European 45 (91.8 %) 46 (93.9 %) 46 (93.9 %) 48 (97.9 %) 46 (93.9 %)
NZ Maori 4 (8.2 %) 3 (6.1 %) 3 (6.1 %) 1 (2 %) 3 (6.1 %)
Ever smoker 28 (57.1 %) 38 (77.6 %) 44 (89.8 %) 25 (51.0 %) 23 (46.9 %)
  1. Data presented as mean (range) or number (%)
  2. aThe column headed GPA describes the cases, while the columns headed COPD and OA describe the two sets of disease control. Disease controls were further divided into those age-matched ±5 years for age at onset of disease (index) and those matched for age at year of interview (interview)
  3. COPD chronic obstructive pulmonary disease, GPA granulomatosis with polyangiitis, NZ New Zealand, OA osteoarthritis