Table 1 The inclusion of a systematic review: (1) included in introduction, (2) available in literature within 12 months of trial commencement but not included and (3) Type of studies included when no systematic review was included in the introduction
N (%) | ||
|---|---|---|
(1) SR included in introduction | Yes | 164 (74.5%) |
(2) SR available in literature within 12 months of trial commencement but not included | Yes | 56 (24.5%) |
Total | 220 (100%) | |
(3) Type of study included if no SR available | In-vitro | 8 (9.9) |
Interventional | 60 (74.1) | |
Observational | 4 (4.9) | |
No study cited | 9 (11.1) | |
Total | 81 (100%) |