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Table 1 Description of study population. Disease prevalence in relation to sex, age, and smoking.

From: Traffic-related air pollution associated with prevalence of asthma and COPD/chronic bronchitis. A cross-sectional study in Southern Sweden

   n Diagnosed asthma Asthma symptoms Diagnosed COPD Chronic b. symptoms
Sex Men 4341 258(5.9%) 429(9.9%) 172(4.0%) 308(7.1%)
  Women 4975 428(8.6%) 686(13.8%) 243(4.9%) 327(6.6%)
Ever smoker No 4306 291(6.8%) 431(10.0%) 118(2.7%) 217(5.0%)
  Yes 5010 395(7.9%) 684(13.7%) 297(5.9%) 418(8.3%)
Age 18–19 135 15(11.1%) 23(17%) 3(2.2%) 9(6.7%)
  20–29 1062 110(10.4%) 141(13.3%) 19(1.8%) 41(3.9%)
  30–39 2045 158(7.7%) 246(12.0%) 61(3.0%) 108(5.3%)
  40–49 1887 112(5.9%) 217(11.5%) 69(3.7%) 101(5.4%)
  50–59 2123 142(6.7%) 237(11.2%) 106(5.0%) 185(8.7%)
  60–69 1586 113(7.1%) 178(11.2%) 115(7.3%) 139(8.8%)
  70–77 478 36(7.5%) 73(15.3%) 42(8.8%) 52(10.9%)