Quality improvement intervention (QII) articles, stratified by the number of continuous quality improvement (CQI) features present
| QII articles (n=106) | ||
| Cut-off: feature ratings ≥2 | Cut-off: feature ratings=3 | |
| No. of CQI features present* (of features 1–6) | n (%) | n (%) |
| 0 of 6 features | 15 (14) | 47 (44) |
| 1 of 6 features | 24 (23) | 21 (20) |
| 2 of 6 features | 15 (14) | 16 (15) |
| 3 of 6 features | 14 (13) | 10 (9) |
| 4 of 6 features | 11 (10) | 6 (6) |
| 5 of 6 features | 12 (11) | 5 (5) |
| 6 of 6 features | 15 (14) | 1 (1) |
| No. of CQI features present* (of features 1–4) | ||
| 0 of 4 features | 28 (26) | 50 (47) |
| 1 of 4 features | 21 (20) | 26 (25) |
| 2 of 4 features | 23 (22) | 21 (20) |
| 3 of 4 features | 14 (13) | 7 (7) |
| 4 of 4 features | 20 (19) | 2 (2) |
↵* ‘Present’ implies both reviewer ratings were greater than or equal to the indicated cut-off. For items CQI-5 and CQI-6, ratings were collapsed to a three-point scale (from the original five-point scale).