| Publication year range | Clinical trial subjects | Studies of men only | Studies of women only | Studies of both men and women |
| 2001–2005 | 51 741 (68.5) | 72 (29.7) | 26 (10.7) | 144 (59.5) |
| 1996–2000 | 23 748 (31.5) | 24 (22.2) | 11 (10.2) | 73 (67.6) |
| Total (1996–2005) | 75 487 (100) | 96 (27.4) | 37 (10.6) | 217 (62) |
Data are n (%).