Judgements of methods of allocation as random or not random
| Method of allocation | Scenario given | Correct totals | ||||||
|---|---|---|---|---|---|---|---|---|
| Class trip | Consultant | |||||||
| Random | Not random | Random | Not random | Random | Not random | |||
| n (%) | 95% CI | n (%) | n (%) | 95% CI | n (%) | |||
| *Missing data, n = 1; †missing data, n = 2; ‡missing data, n = 3; §missing data, n = 4; ¶missing data, n = 6. | ||||||||
| The bold correct totals form basis for table 2. | ||||||||
| CI, confidence interval. | ||||||||
| Computer | 55 (85.9) | 75.3 to 92.4 | 9 (14.1)* | 55 (87.3) | 76.9 to 93.4 | 8 (12.7)† | 110 | 17‡ |
| Toss coin | 48 (75.0) | 63.2 to 84.0 | 16 (25.0)* | 48 (77.4) | 65.6 to 86.0 | 14 (22.6)‡ | 96 | 30§ |
| Draw out of hat | 58 (92.1) | 82.7 to 96.6 | 5 (7.9)† | 46 (73.0) | 61.0 to 82.4 | 17 (27.0)† | 104 | 22§ |
| Ask which prefer | 5 (8.1) | 3.5 to 17.5 | 57 (91.9)‡ | 14 (22.6) | 14.0 to 34.4 | 48 (77.4)‡ | 19 | 105¶ |
| Allocate in turn | 30 (46.9) | 35.2 to 58.9 | 34 (53.1)* | 34 (54.0) | 41.8 to 65.7 | 29 (46.0)† | 64 | 63‡ |