Study | Inclusion and exclusion criteria | Outcome | Sequence generation | Allocation concealment | Blinding | Sample | Attrition, % | Funding | |||
---|---|---|---|---|---|---|---|---|---|---|---|
First author | Location | 1ry | 2ry | calc. | size | ||||||
Fairall et al., 2012 [25] | ZA 2 | ✓ | ✓ | ✓ | A | A | d | ✓e | ≥200 | <20 | G |
Fairall et al., 2012 [25] | ZA 1 | ✓ | ✓ | ✓ | A | A | d | ✓e | ≥200 | ≥20 | G |
Houweling et al., 2011 [27] | NL 3 | ✓ | ✓ | ✓ | I | A | NP | ✓ | ≥200 | <20 | G |
Andryukhin et al., 2011 [18] | RU 1 | ✓ | U | I | c | ✓e | <200 | ≥20 | None | ||
Dierick-van Daele et al., 2009 [24] | NL 2 | ✓ | A | A | NP | ≥200 | ≥20 | G | |||
Chan et al., 2009 [22] | UK 6 | ✓ | A | A | b | ✓ | <200 | <20 | nr | ||
Hesselink et al., 2004 [26] | NL 1 | a | ✓ | ✓ | U | U | b | ✓ | ≥200 | ≥20 | nr |
Denver et al., 2003 [23] | UK 5 | a | ✓ | ✓ | I | I | NP | ✓e | <200 | <20 | nr |
Kernick et al., 2000 [28] | UK 4 | ✓ | ✓ | A | U | U | ✓e | <200 | ≥20 | Ind. | |
Kinnersley et al., 2000 [34] | UK 3 | ✓ | ✓ | ✓ | A | A | NP | ✓e | ≥200 | ≥20 | G |
Shum et al., 2000 [32] | UK 2 | ✓ | A | A | NP | ✓e | ≥200 | ≥20 | G | ||
UK 1 | ✓ | A | I | b | ✓ | ≥200 | ≥20 | G |