Table 1. Characteristics of wheeze and asthma outcomes in ALSPAC by sex, with follow-up rates at each time-point as a percentage of total cohort size for each sex (total ALSPAC = 7,544 males and 7,155 females).
| Age (years) | Asthma in last 12 months* | Wheeze in last 12 months | |||
|---|---|---|---|---|---|
| N with data (% follow-up) |
n with asthma (% of N) | N with data (% follow-up) |
n with wheeze (% of N) | ||
|
Mother completed time-points (years) | |||||
| 0.5 | Male | - | - | 5884(78.0%) | 1759(29.9%) |
| Female | - | - | 5510(77.0%) | 1243(22.6%) | |
| 1.5 | Male | - | - | 5662(75.1%) | 1744(30.8%) |
| Female | - | - | 5291(73.9%) | 1272(24.0%) | |
| 2.5 | Male | - | - | 5157(68.4%) | 1321(25.6%) |
| Female | - | - | 4812(67.3%) | 936(19.5%) | |
| 3.5 | Male | - | - | 5166(68.5%) | 1000(19.4%) |
| Female | - | - | 4817(67.3%) | 757(15.7%) | |
| 4.8 | Male | - | - | 4862(64.4%) | 1038(21.3%) |
| Female | - | - | 4528(63.3%) | 739(16.3%) | |
| 5.8 | Male | - | - | 4429(58.7%) | 767(17.3%) |
| Female | - | - | 4156(58.1%) | 561(13.5%) | |
| 6.8 | Male | 4365(57.9%) | 609(14.0%) | 4315(57.2%) | 646(15.0%) |
| Female | 4125(57.7%) | 454(11.0%) | 4071(56.9%) | 481(11.8%) | |
| 7.6 | Male | 4215(55.9%) | 568(13.5%) | 4220(55.9%) | 531(12.6%) |
| Female | 3984(55.7%) | 387(9.7%) | 3989(55.8%) | 353(8.8%) | |
| 8.6 | Male | 4179(55.4%) | 572(13.7%) | 4172(55.3%) | 629(15.1%) |
| Female | 4033(56.4%) | 402(10.0%) | 4024(56.2%) | 427(10.6%) | |
| 10.7 | Male | 3914(51.9%) | 545(13.9%) | 3850(51.0%) | 568(14.8%) |
| Female | 3864(54.0%) | 389(10.1%) | 3804(53.2%) | 368(9.7%) | |
| 11.7 | Male | - | - | 3693(49.0%) | 509(13.8%) |
| Female | - | - | 3710(51.9%) | 363(9.8%) | |
| 13.1 | Male | 3492(46.3%) | 473(13.5%) | 3486(46.2%) | 431(12.4%) |
| Female | 3526(49.3%) | 360(10.2%) | 3518(49.2%) | 311(8.8%) | |
| 13.8 | Male | 3537(46.9%) | 452(12.8%) | 3476(46.1%) | 427(12.3%) |
| Female | 3507(49.0%) | 366(10.4%) | 3464(48.4%) | 338(9.8%) | |
| 16.5 | Male | - | - | 2736(36.3%) | 286(10.5%) |
| Female | - | - | 2905(40.6%) | 307(10.6%) | |
|
Child completed time-points (years) | |||||
| 16.5 | Male | 2055(27.2%) | 245(11.9%) | 2047(27.1%) | 353(17.2%) |
| Female | 2968(41.5%) | 374(12.6%) | 2960(41.4%) | 668(22.6%) | |
| 18.6 | Male | - | - | 1189(15.8%) | 185(15.6%) |
| Female | - | - | 2162(30.2%) | 470(21.7%) | |
*Questions on asthma in the last 12 months were not included in ALSPAC questionnaires between the ages of 6 months and 5.8 years, at 11.5 years and at 18.6 years.