Studies | Selection | Comparability | Assessment of outcome | Total quality score | ||||||
---|---|---|---|---|---|---|---|---|---|---|
First author | Representativeness of exposure arm(s) | Selection of the comparative arm(s) | Origin of exposure source | Demonstration that outcome of interest was not present at start of study | Studies controlling the most important factors | Studies controlling the other main factors | Assessment of outcome with independency | Adequacy of follow-up length (to assess outcome) | Lost to follow-up acceptable (less than 10% and reported) | |
Doenyas-Bara [19] | * | * | * | * | * | * | * | * | Â | 8 |
Green [21] | * | * | * | * | * | * | * | * | Â | 8 |
Jochmans [20] | * | * | * | * | * | * | * | * | Â | 8 |
Park [22] | * | * | * | * | * | * | * | * | Â | 8 |
van Vught [23] | * | * | * | * | * | – | * | * |  | 7 |