Item | n (%) |
---|---|
1. Method of allocation of study groups | Â |
   2 = Random | 48 (86) |
   1 = Quasi-random | 2 (4) |
   0 = Selected concurrent controls | 6 (11) |
2. Unit of allocation | Â |
   2 = Cluster (e.g. practice) | 20 (36) |
   1 = Physician | 13 (23) |
   0 = Patient | 23 (41) |
3. Presence of baseline differences between groups | Â |
   2 = No baseline differences present or appropriate statistical adjustments made | 36 (64) |
   1 = Baseline differences present and no statistical adjustments made | 6 (11) |
   0 = Baseline characteristics not reported | 14 (25) |
4. Objectivity of outcome measures | Â |
   2 = Objective outcomes or subjective outcomes with blinded assessment | 53 (95) |
   1 = Subjective outcomes with no blinding but clearly defined assessment criteria | 3 (5) |
   0 = Subjective outcomes with no blinding and poorly defined | 0 (0) |
5. Completeness of follow-up for appropriate unit of analysis | Â |
   2 = >90% | 50 (89) |
   1 = 80-90% | 2 (4) |
   0 = <80% | 4 (7) |