Methodological quality
Table 3⇓ shows the results of the analysis of risk of bias. Although few studies were judged at high risk in any one domain, the quality of some studies could not be judged with any certainty in several domains. Prospective daily calendars returned monthly are the preferred method for recording falls,16 and most of the trials used this method. However, only six of the 11 trials that reported data on serious injuries used medical records to confirm the injury.