Cross tabulation of key ALSPAC asthma variables and GPRD asthma
| ALSPAC asthma outcome | GP-recorded diagnosis of asthma | Overall | |
|---|---|---|---|
| No | Yes | ||
| Doctor diagnosis of asthma by 7.5 years | |||
| No | 110 (95.7%) | 3 | 113 |
| Yes | 5 | 23 (88.5%) | 28 (19.9%) |
| Ever reported breathlessness in the past 12 months | |||
| No | 96 (83.5%) | 6 | 102 |
| Yes | 19 | 20 (76.9%) | 39 (27.7%) |
| Ever reported wheezing in the past 12 months | |||
| No | 69 (60.0%) | 0 | 69 |
| Yes | 46 | 26 (100%) | 72 (51.1%) |
| Wheezing reported on at least two occasions | |||
| No | 88 (76.5%) | 3 | 91 |
| Yes | 27 | 23 (88.5%) | 50 (35.5%) |
| Wheezing reported after the age of 3 years | |||
| No | 96 (83.5%) | 9 | 105 |
| Yes | 19 | 17 (65.4%) | 36 (25.5%) |
| Ever reported a frequent wheeze | |||
| No | 96 (83.5%) | 7 | 103 |
| Yes | 19 | 19 (73.1%) | 38 (27.0%) |
| Reported a frequent wheeze after the age of 3 years | |||
| No | 110 (95.7%) | 11 | 121 |
| Yes | 5 | 15 (57.7%) | 20 (14.2%) |
ALSPAC, Avon Longitudinal Study of Parents and Children; GP, general practitioner; GPRD, General Practice Research Database.