Table 3 Assessment of risk of bias in included studies
Author | Selection bias | Detection bias | Reporting bias | Other sources of bias |
|---|---|---|---|---|
Evans et al. [26] | L | M | M | L |
Hartill [24] | H | M | H | H |
Johnson [27] | M | M | H | L |
Johnson [28] | M | M | M | L |
Kentucky Health Issues Poll [34] | H | M | H | L |
Kilbane-Dawe et al. [35] | H | M | H | L |
Licskai et al. [39] | H | H | H | H |
Lyons et al. [36] | L | L | L | L |
Mak, et al. [43] | H | M | H | L |
Mansfield et al. [33] | L | M | M | L |
Laube [38] | M | M | M | H |
McDermott et al. [25] | H | M | H | L |
Radisic, et al. [41] (qualitative) | M | L | L | L |
Radisic et al. [40] | M | M | H | L |
Reams et al. [29] | H | H | H | M |
Semenza et al. [30] | M | M | H | L |
Skov et al. [15] | L | M | H | L |
Smallbone [37] | H | M | H | L |
Stieb et al. [42] | M | H | H | L |
Sugerman et al. [31] | L | M | M | L |
Wen et al. [32] | M | M | L | L |