| Subsample with lung function measurements (n=1121) | Total cohort (n=1536) |  | ||
---|---|---|---|---|---|
Variables | N | % | N | % | p-value |
Gender | Â | Â | Â | Â | Â |
  Males | 557 | 49.7 | 786 | 51.2 | 0.45 |
  Females | 564 | 50.3 | 750 | 48.8 |  |
  Missing | 0 |  | 0 |  |  |
In utero smoke exposure | Â | Â | Â | Â | Â |
  Yes | 253 | 22.7 | 384 | 25.2 | 0.12 |
  No | 864 | 77.4 | 1137 | 74.8 |  |
  Missing | 419 |  | 15 |  |  |
SHS smoke exposure at age 10 | Â | Â | Â | Â | Â |
  Yes | 508 | 45.3 | 848 | 56.7 | 0.26 |
  No | 609 | 54.3 | 647 | 43.3 |  |
  Missing | 419 |  | 41 |  |  |
SHS smoke exposure at age 18 | Â | Â | Â | Â | Â |
  Yes | 563 | 55.2 | 716 | 56.7 | 0.49 |
  No | 457 | 44.8 | 548 | 43.3 |  |
  Missing | 516 |  | 272 |  |  |
Active smoking at age 18 | Â | Â | Â | Â | Â |
  Yes | 276 | 26.9 | 368 | 28.8 | 0.30 |
  No | 752 | 73.2 | 910 | 71.2 |  |
  Missing | 508 |  | 258 |  |  |
 | Median (5th percentile, 95th percentile); n |  | |||
Height at age 10 (cm) | 138.7 (129.1, 149.5); 1026 | 138.7 (129.1, 149.5); 1043 | 0.98 | ||
Missing | 510 | 493 | Â | ||
Height at age 18 (cm) | 171.0 (156.5, 186.5); 918 | 171.0 (156.5, 187.0); 994 | 0.64 | ||
Missing | 618 | 542 | Â | ||
BMI at age 10 (kg/m2) | 17.4 (14.7, 24.1); 1026 | 17.4 (14.7, 23.9); 1043 | 0.92 | ||
Missing | 510 | 493 | Â | ||
BMI at age 18 (kg/m2) | 22.2 (18.2, 32.2); 896 | 22.2 (18.2, 32.2); 964 | 0.91 | ||
Missing | 640 | 572 | Â |