From: Effectiveness of screening preschool children for amblyopia: a systematic review
Reference | Prospective sample size planning | Blinding of outcome assessor | Comparability of groups | Consideration of confounding factors | Transparency of patient flow |
---|---|---|---|---|---|
Bray 1996 33 | No* | Not specified | Not specified | Not specified | Yes|| |
Eibschitz-Tsimhoni 2000 27 | No | Not specified | Not specified# | Not specified | No 82% of the originally recruited children were included in the analysis** |
Rasmussen 2000 34 | No | No | Not specified | No | Yes|| |
Williams 2002 31,32 | No† | Yes | Yes | Yes§ | No about 55% of the originally recruited children (equally distributed in both groups) were included in the analysis†† |
Williams 2003 28,29,30 | No* | Yes | No‡ | Yes§ | No only children who took part at the final assessment were presented and analysed (62% of the originally recruited children) |