Table 2 Numerical characteristics of trials
Characteristic | Valid n (%) | Recruited successfully (%) | Mean (SD) | Median | Minimum to maximum |
|---|---|---|---|---|---|
No. of centers: | Â | Â | Â | Â | Â |
Total | 60 (82) | 34 (57) | 38.6 (47.9) | 15.5 | 2 to 205 |
2 to 5 | 16 (27) | 9 (56) | 3.4 (1.3) | 3.5 | Â |
6 to 10 | 9 (15) | 5 (56) | 7.6 (1.4) | 8.0 | Â |
11 to 20 | 7 (12) | 4 (57) | 14.3 (2.7) | 13.0 | Â |
21 to 50 | 11 (18) | 6 (55) | 33.2 (8.4) | 34.0 | Â |
51 to 100 | 9 (15) | 4 (44) | 68 (12.6) | 68.0 | Â |
101+ | 8 (13) | 6 (75) | 139.5 (39.5) | 119.0 | Â |
Target recruitment: | Â | Â | Â | Â | Â |
Total | 73 | 40 (55) | 706.3 (1,098.0) | 388.0 | 56 to 8,000 |
1 to 100 | 6 (8) | 4 (67) | 77.8 (14.1) | 78.0 | Â |
101 to 200 | 11 (15) | 6 (55) | 156.8 (30.4) | 150.0 | Â |
201 to 400 | 24 (33) | 15 (63) | 315.9 (56.6) | 305.0 | Â |
401 to 1,000 | 22 (30) | 10 (46) | 637.5 (168.5) | 595.0 | Â |
1,001+ | 10 (14) | 5 (50) | 2,776 (1,938.7) | 2,250.0 | Â |
Final recruitment | Â | Â | Â | Â | Â |
Total | 73 | 40 (55) | 623.7 (1,117.3) | 325.0 | 44 to 8,164 |
1 to 100 | 7 (10) | 1 (14) | 80.3 (36.8) | 58.0 | Â |
101 to 200 | 14 (19) | 8 (57) | 160.4 (60.1) | 151.0 | Â |
201 to 400 | 24 (33) | 14 (58) | 295.8 (75.6) | 284.0 | Â |
401 to 1,000 | 20 (27) | 12 (60) | 519.2 (313.9) | 538.5 | Â |
1,001+ | 8 (11) | 5 (63) | 2,476.3 (2,269.6) | 2,478.5 | Â |