Respondents (%) with each of the following reported symptoms indicating severity of asthma, rhinitis, and eczema, in the overall population and different age groups for the 1994 and 2001 surveys
| 6–7 year age group | 12–15 year age group | |||||
|---|---|---|---|---|---|---|
| 1994 | 2001 | p value† | 1994 | 2001 | p value† | |
| †Adjusted for sex, race, and housing type. | ||||||
| Wheeze in past year (n) | 316 | 543 | 407 | 472 | ||
| No. of wheezing episodes | ||||||
| 1–3 | 76.8 | 83.8 | 78.6 | 77.7 | ||
| 4–12 | 18.8 | 13.9 | 14.8 | 15.5 | ||
| >12 | 4.4 | 2.3 | 0.008 | 6.6 | 6.8 | 0.468 |
| Woken by wheeze | ||||||
| Never | 59.2 | 60.2 | 58.7 | 60.9 | ||
| <1 per week | 30.4 | 30.5 | 29.5 | 27.3 | ||
| >1 per week | 10.4 | 9.3 | 0.111 | 11.8 | 11.8 | 0.147 |
| Wheezing attack limiting speech | 9.2 | 8.6 | 0.140 | 23.6 | 18.5 | 0.035 |
| Rhinitis in past year (n) | 535 | 1361 | 1723 | 1683 | ||
| Interfering with daily activity | ||||||
| Not at all | 42.4 | 31.0 | 35.8 | 23.2 | ||
| Little | 44.3 | 54.8 | 50.5 | 57.4 | ||
| Moderate | 11.8 | 11.3 | 9.9 | 15.1 | ||
| A lot | 1.5 | 2.9 | 0.003 | 3.8 | 4.3 | <0.001 |
| Rash in past year (n) | 58 | 658 | 394 | 472 | ||
| Persistent rash without clearing | 46.6 | 43.6 | 0.888 | 41.6 | 35.2 | 0.092 |
| Kept awake by rash | ||||||
| Never | 53.4 | 60.1 | 59.1 | 51.1 | ||
| <1 per week | 36.2 | 28.6 | 29.4 | 29.6 | ||
| >1 per week | 10.3 | 11.3 | 0.479 | 11.5 | 19.3 | 0.005 |