Table 2.
Number of healthy subjects who came for screening at our unit, and the number and percentage of these who attempted to volunteer for a trial within 3, 2 or 1 months of completing a previous trial
| Year | Number of volunteers who came for screening | Number (%) of volunteers completing a trial elsewhere within the previous: | ||
|---|---|---|---|---|
| 3 months | 2 months | 1 month | ||
| 1997–2001 | 6,998 | 68 (1.0) | 56 (0.8) | 31 (0.4) |
| 2002a | 1,490 | 52 (3.5) | 43 (2.9) | 22 (1.5) |
| 2003 | 1,811 | 83 (4.6) | 62 (3.4) | 23 (1.3) |
| 2004 | 1,092 | 18 (1.6) | 15 (1.4) | 9 (0.8) |
| 2005 | 836 | 20 (2.4) | 14 (1.7) | 8 (1.0) |
| 2006 | 1,583 | 38 (2.4) | 27 (1.7) | 14 (0.9) |
| 2007 | 1,257 | 20 (1.6) | 14 (1.1) | 3 (0.2) |
| 2008 | 1,349 | 13 (1.0) | 11 (0.8) | 5 (0.4) |
| 2009 | 767 | 5 (0.7) | 5 (0.7) | 3 (0.4) |
| 2010 | 1,114 | 9 (0.8) | 9 (0.8) | 6 (0.5) |
| 2011b | 990 | 5 (0.5) | 5 (0.5) | 2 (0.2) |
aTOPS launched in 2002
bFirst half of year only