No. | First author, year | Selection | Comparability | Outcome | Total |
---|
1 | 2 | 3 | 4 | 1 | 2 | 3 |
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1. | Tiedt, Germany [53] | * | * | * | * | Â | * | * | * | 7 |
- Maximum points for selection number 4, comparability, and outcome number 1 were 2
- Selection: (1) representativeness of the sample, (2) sample size, (3) non-respondents, (4) risk factor measurement tool
- Outcome: (1) assessment of the outcome, (2) statistical test