Table 1 Basic characteristics of the study sample examined during 2009–2012
From: Decreased COPD prevalence in Sweden after decades of decrease in smoking
Characteristic | Sex | Area | All | P-value for difference by | ||||
|---|---|---|---|---|---|---|---|---|
Women | Men | South-western Sweden | Northern Sweden | |||||
n = 968 | n = 871 | n = 1148 | n = 691 | n = 1839 | Sex | Area | ||
Age | Mean (SD) | 50.3 (14.9) | 52.1 (14.8) | 50.6 (15.1) | 52.0 (14.3) | 51.1 (14.8) | 0.010 | 0.058 |
BMI | Mean (SD) | 26.3 (4.8) | 26.9 (3.7) | 26.2 (4.2) | 27.2 (4.5) | 26.6 (4.4) | 0.003 | < 0.001 |
Never-smoker | n (%) | 491 (50.7%) | 475 (54.6%) | 610 (53.1%) | 356 (51.6%) | 966 (52.6%) | ||
Ex-smoker | n (%) | 324 (33.5%) | 313 (36.0%) | 407 (35.5%) | 230 (33.3%) | 637 (34.7%) | ||
Current smoker | n (%) | 153 (15.8%) | 82 (9.4%) | 131 (11.4%) | 104 (15.1%) | 235 (12.8%) | < 0.001 | 0.072 |
Never-smoker | n (%) | 491 (51.3%) | 475 (54.8%) | 610 (53.5%) | 356 (52.0%) | 966 (53.0%) | ||
≤ 10 packyears | n (%) | 244 (25.5%) | 189 (21.8%) | 266 (23.3%) | 167 (24.4%) | 433 (23.7%) | ||
11–20 packyears | n (%) | 126 (13.2%) | 61 (7.0%) | 114 (10.0%) | 73 (10.7%) | 187 (10.3%) | ||
21–30 packyears | n (%) | 64 (6.7%) | 61 (7.0%) | 71 (6.2%) | 54 (7.9%) | 125 (6.9%) | ||
> 30 packyears | n (%) | 33 (3.4%) | 80 (9.2%) | 79 (6.9%) | 34 (5.0%) | 113 (6.2%) | < 0.001 | 0.292 |
Exp to GDF at work | n (%) | 142 (14.8%) | 353 (41.1%) | 282 (24.7%) | 213 (31.6%) | 495 (27.3%) | < 0.001 | 0.002 |
University education | n (%) | 447 (46.7%) | 303 (35.5%) | 533 (46.6%) | 217 (32.6%) | 750 (41.4%) | < 0.001 | < 0.001 |