Table 2 Summary of decline in lung function in study population from 1991 to 2000.
| Number of individuals | Mean (SD) decline in FEV1 (ml) | Mean (SD) decline in FVC (ml) | |
|---|---|---|---|
| Total population | 1343 | 341 (291) | 274* (391) |
| Gender | |||
| Male | 666 | 385 (325) | 347 (437) |
| Female | 677 | 297 (245) | 202† (325) |
| Smoking status in 1991 | |||
| Never | 713 | 310 (284) | 220‡ (385) |
| Ex | 390 | 361 (304) | 338 (409) |
| Current | 240 | 397 (281) | 330 (357) |
| Age in 1991 | |||
| 18–30 | 137 | 238 (297) | 27§ (324) |
| 30–40 | 265 | 294 (240) | 173 (303) |
| 40–50 | 376 | 337 (250) | 280 (339) |
| 50–60 | 342 | 376 (308) | 362 (400) |
| 60–70 | 223 | 411 (349) | 401 (484) |
| Decile of CRP in 1991 | |||
| 1 | 117 | 346 (285) | 210 (415) |
| 2 | 131 | 350 (265) | 244 (397) |
| 3 | 124 | 345 (270) | 264¶ (395) |
| 4 | 133 | 381 (316) | 308 (399) |
| 5 | 125 | 353 (275) | 322 (336) |
| 6 | 137 | 320 (247) | 292 (325) |
| 7 | 132 | 305 (230) | 222 (333) |
| 8 | 126 | 324 (258) | 294 (346) |
| 9 | 119 | 333 (360) | 295 (470) |
| 10 | 109 | 361 (395) | 317 (485) |
FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity.
*Data from 1342 individuals.
†Data from 676 individuals.
‡Data from 712 individuals.
§Data from 136 individuals.
¶Data from 123 individuals.