Table 3

Quality assessment criteria score

12-Point quality assessment score for included studies
1Is there a clearly focused risk factor addressed?
2Is there appropriated study methodology used?
3Is there a clear definition of the participant group?
4Was the cohort recruited appropriately?
5Is there a clearly defined inclusion and exclusion criteria?
6Was the outcome accurately measured to minimise bias?
7Have all confounding factors been identified?
8Was the subject follow-up complete?
9Was subject follow-up long enough?
10What are the results—are they clear? (ie, reported statistical results)
11Are the results precise? (Accurate or poor?)
12Do you believe the results?