Characteristics of study population by sex, age, body mass index, smoking habits, pack years, occupational exposure and residential area in an adult general Norwegian population, 1996–7
| Women (%) | Men (%) | N (%) | |
|---|---|---|---|
| Age (years) | |||
| 26–44 | 434 (39) | 496 (45) | 930 (42) |
| 45–59 | 374 (33) | 326 (30) | 700 (31) |
| 60–74 | 239 (21) | 226 (20) | 465 (21) |
| 75–82 | 82 (7) | 58 (5) | 140 (6) |
| Body mass index (kg/m2) | |||
| <20 | 80 (7) | 32 (3) | 112 (5) |
| 20–24.9 | 543 (49) | 426 (38) | 969 (43) |
| 25–29.9 | 338 (30) | 530 (48) | 868 (39) |
| >30 | 162 (14) | 117 (11) | 279 (13) |
| Smoking habits | |||
| Never | 506 (45) | 358 (33) | 864 (39) |
| Ex | 262 (23) | 357 (32) | 619 (28) |
| Current | 361 (32) | 391 (35) | 752 (33) |
| Pack years for ever smokers | |||
| 1–9 | 308 (27) | 233 (21) | 541 (24) |
| 10–19 | 176 (16) | 232 (21) | 408 (18) |
| 20+ | 124 (11) | 250 (23) | 374 (17) |
| Educational level | |||
| Primary | 215 (19) | 189 (17) | 404 (18) |
| Secondary | 669 (59) | 642 (58) | 1311 (59) |
| University | 230 (20) | 264 (24) | 494 (22) |
| Occupational exposure to gas or dust | |||
| No | 750 (66) | 386 (35) | 1136 (51) |
| Yes | 350 (31) | 699 (63) | 1049 (47) |
| Residential area | |||
| Urban | 776 (69) | 753 (68) | 1529 (68) |
| Rural | 353 (31) | 353 (32) | 706 (32) |
| Total | 1129 (100) | 1106 (100) | 2235 (100) |