Variables | Â | Males | Females | ||||
---|---|---|---|---|---|---|---|
Categorical variables | Subsample (n = 190); n (%) | Complete cohort (n = 786); n (%) | p-value | Subsample (n = 140); n (%) | Complete cohort (n = 750); n (%) | p-value | |
Socio-economic status | Low | 23 (12.23) | 106 (15.5) | 0.46 | 22 (15.83) | 103 (15.30) | 0.72 |
 | Mid | 150 (79.79) | 517 (75.58) |  | 104 (74.82) | 520 (77.27) |  |
 | High | 15 (7.98) | 61 (8.92) |  | 13 (9.35) | 50 (7.43) |  |
Active smoking status (18Â years) | Past | 96 (51.34) | 340 (54.23) | 0.43 | 77 (55.4) | 323 (50.16) | 0.53 |
 | Current | 50 (26.74) | 176 (28.07) |  | 37 (26.62) | 192 (29.81) |  |
 | Never | 41 (21.93) | 111 (17.7) |  | 25 (17.99) | 129 (20.03) |  |
Active smoking status (26Â years) | Yes | 58 (37.91) | 146 (31.06%) | 0.12 | 40 (32) | 176 (31.37) | 0.89 |
 | No | 95 (62.09) | 324 (68.94%) |  | 85 (68) | 385 (68.63) |  |
Second-hand smoking (10Â years) | Yes | 106 (56.68) | 489 (64.26%) | 0.05 | 80 (57.55) | 445 (61.38) | 0.40 |
 | No | 81 (43.32) | 272 (35.74%) |  | 59 (42.45) | 280 (38.62) |  |
Continuous variables | Mean ± SD | Mean ± SD |  | Mean ± SD | Mean ± SD | p-value |
---|---|---|---|---|---|---|
Age of puberty | 14.1 ± 1.21 | 14.24 ± 1.24 | 0.11 | 12.6 ± 1.36 | 12.72 ± 1.42 | 0.3 |
Height at 18 years | 177.40 ± 6.82 | 178.24 ± 6.87 | 0.09 | 164.14 ± 6.45 | 164.73 ± 6.33 | 0.28 |
FEV1 at 18 years | 4.65 ± 0.62 | 4.6 1 ± 0.67 | 0.38 | 3.5 ± 0.41 | 3.47 ± 0.54 | 0.39 |
FVC at 18 years | 5.37 ± 0.73 | 5.36 ± 0.78 | 0.89 | 3.98 ± 0.45 | 3.95 ± 0.58 | 0.41 |
FEV1/FVC (18 years) | 0.87 ± 0.08 | 0.87 ± 0.11 | 0.89 | 0.88 ± 0.06 | 0.89 ± 0.12 | 0.08 |