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Baseline characteristics of recruited children, N = 612
| Characteristics | n (%)a |
|---|---|
| Male | 332 (54.2) |
|
| |
| Age, mean, years (SD) | 10.0 (3.3) |
|
| |
| On asthma register | 456 (74.5) |
|
| |
| Previous spirometry testing | 58 (9.5) |
|
| |
| Ethnicity | |
| White | 480 (78.4) |
| Asian | 82 (13.4) |
| Black | 21 (3.4) |
| Mixed | 20 (3.3) |
| Other | 9 (1.5) |
Unless otherwise stated. SD = standard deviation.
