Distribution of controls according to frequency of use of short acting β agonists and inhaled steroids
| Short acting β agonists | ||||
|---|---|---|---|---|
| Inhaled steroids | <3 Rx | 4–6 Rx | 7–12 Rx | 13+ Rx |
| None | 285 (64%) | 33 (18%) | 22 (14%) | 6 (8%) |
| 1–6 Rx | 128 (29%) | 134 (71%) | 63 (40%) | 15 (21%) |
| 7+ Rx | 30 (7%) | 21 (11%) | 72 (46%) | 51 (71%) |
| Total | 443 (100%) | 188 (100%) | 157 (100%) | 72 (100%) |