Table 2. Assessment of potential threats to internal/external validity of included studies.
| Study | Fall or faller clearly defined | Blinded adjudicationof event | Confounding assessed | Cut-scorepre-defined | Prediction tool compared to clinical judgment* |
| Coker 2003 | |||||
| STRATIFY | + | ? | − | NA | − |
| Haines 2006 | |||||
| STRATIFY | + | + | + | NA | − |
| PJC-FRAT | + | − | + | NA | − |
| Vassallo 2008 | |||||
| STRATIFY | ? | ? | − | + | + |
| DOWNTON | ? | ? | − | + | + |
| Clinical | ? | ? | − | + | NA |
| Judgement | |||||
+: the criterion was satisfied; –: the criterion was not satisfied; ?: it was unclear whether the criterion was satisfied; NA: Not applicable; *comparison of sensitivity.