Frequency of respiratory symptoms at 6, 12, and both 6 and 12 months
| 6 months* | 12 months† | 6 and 12 months | |
|---|---|---|---|
| Data are percentage of positive responses to each question (number of positives/number responding to each question). | |||
| *6 month questionnaire completed at 5–8 months. | |||
| †12 month questionnaire completed at 11–15 months. | |||
| ‡Totals indicate maximum number responding. The 6 and 12 month analysis required children to have a positive response at both time points. Therefore children who reported “no” to a symptom at one time point and had no response (missing) at the other were classified as “no” overall. | |||
| Total‡ | 386 | 430 | 459 |
| Cough | 49% (189/386) | 51% (219/430) | 27% (107/403) |
| Frequent cough | 20% (77/239) | 18% (76/427) | 6% (26/459) |
| Cough without infection | 23% (86/367) | 21% (89/415) | 6% (28/439) |
| Wheeze | 40% (152/382) | 42% (171/409) | 20% (84/415) |
| Frequent wheeze | 16% (61/375) | 13% (50/399) | 3% (14/456) |
| Wheeze without infection | 20% (71/362) | 18% (73/402) | 6% (26/445) |
| Bronchodilators | 22% (84/386) | 36% (156/430) | 14% (63/459) |
| Inhaled steroids | 13% (103/381) | 17% (71/430) | 8% (37/459) |
| Bronchodilators or inhaled steroids | 27% (103/381) | 38% (165/429) | 15% (67/433) |