Characteristics of asthma education studies (n = 77)
| Information included | |||||
|---|---|---|---|---|---|
| No. (%) | Missing (%) | Mean | Median | Max–min | |
| Duration of follow up (weeks) | 69 (90) | 8 (10) | 9.8 | 9.0 | 0.25–54 |
| Patients | |||||
| Screened | 18 (23) | 59 (77) | 497 | 202 | 30–4400 |
| Eligible | 24 (33) | 53 (67) | 211 | 124 | 14–980 |
| Enrolled | 72 (93) | 5 (7) | 122 | 79 | 5–801 |
| Analysed | 75 (96) | 2 (4) | 106 | 65 | 5–801 |
| Year of publication | |||||
| <1990 | 22 (29) | ||||
| 1990–1994 | 25 (33) | ||||
| >1994 | 30 (39) | ||||
| Recruitment (not known in 4 studies) | |||||
| Outpatients | 48 (62) | ||||
| Inpatients | 10 (13) | ||||
| Emergency room | 6 (8) | ||||
| Combination of the three | 6 (8) | ||||
| Others | 3 (5) | ||||
| Country | |||||
| North America | 31 (42) | ||||
| UK | 15 (25) | ||||
| Continental Europe | 19 (19) | ||||
| Australia/NZ | 9 (12) | ||||
| Other1-150 | 3 (2) | ||||
| Study design | |||||
| Randomised controlled trial (RCT) | 42 (55) | ||||
| Non-RCT | 11 (14) | ||||
| Single intervention trial | 24 (31) | ||||
↵1-150 India (1), Brazil (2).