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Table 1

From: Smoking and secondhand smoke among patients with systemic lupus erythematosus and controls: associations with disease and disease damage

  Never smokers, n(%) Ever smokers, n(%) Current smokers, n(%) Secondhand smoke < 18 years old, n(%) Secondhand smoke ever, n(%)
All patients (n = 545) 407 (74.7%) 138 (25.3%) 72 (15.1%) 132 of 372 (35.5%) 158 of 376 (42.0%)
African American patients (n = 416) 328 (78.9%) 88 (21.2%) 49 (11.8%) 111 of 313 (35.5%) 127 of 315 (40.3%)
Caucasian patients (n = 109) 63 (57.8%) 46 (42.2 %) 21 (19.3%) 19 of 47 (40.4%) 26 of 47 (55.3%)
Other patients (n = 20) 16 (80%) 4 (20.0%) 2 (10%) 2 of 12 (16.7%) 5 of 14 (35.7%)
All controls (African American) (n = 386) 284 (73.6%) 102 (26.4%) 57 (14.8%) 92 of 354 (25.6%) 120 of 357 (33.6%)
Related controls (n = 222) 155 (69.8%) 67 (30.2%) 36 (16.2%) 51 of 205 (24.9%) 67 of 207 (32.4%)
Unrelated controls (n = 164) 129 (78.7%) 35 (21.3%) 21 (12.8%) 41 of 149 (27.5%) 53 of 150 (35.3%)
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