Table 1.
Number of reviews by type of intervention
Year of publication | Type of intervention | Total number of reviews | ||||
Drug | Surgical/dental | Physical | Diagnostic/screening | Other | ||
1994 | 5 | 0 | 0 | 0 | 0 | 5 |
1995 | 9 | 0 | 0 | 0 | 3 | 12 |
1996 | 9 | 6 | 2 | 0 | 5 | 21 |
1997 | 15 | 2 | 1 | 0 | 6 | 29 |
1998 | 18 | 2 | 0 | 0 | 4 | 23 |
1999 | 21 | 1 | 0 | 1 | 4 | 27 |
2000 | 13 | 2 | 1 | 0 | 2 | 17 |
2001 | 17 | 1 | 2 | 0 | 9 | 27 |
2002 | 19 | 7 | 3 | 0 | 11 | 40 |
2003 | 26 | 1 | 3 | 0 | 14 | 44 |
2004 | 12 | 1 | 1 | 0 | 3 | 17 |
Jan-Apr 2005 | 0 | 0 | 0 | 0 | 0 | 0 |
Total | 164 | 20 | 13 | 1 | 56 | 256 |
The sum of reviews by intervention is greater than the total number of reviews because 5 reviews examined 2 (4 reviews) or 3 (1 review) types of intervention (e.g. drug and non-drug antihypertensive therapy)