Article | External validity | Internal validity | Overall score | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Population was a close representation of national population | Sampling frame was a close representation of population | Randomised sample or census data were used | Minimal non-response bias | Data collected directly from the subjects | Acceptable case definition was used | Instrumentation was reliable and valid | The same mode of data collection was used for all subjects | The length of the assessment period was appropriate | The numerator and denominator of the parameter of interest was reported | ||
Bennell et al10 | High | Low | High | Low | Low | Low | Low | Low | Low | High | Low |
Bennell et al12 | High | Low | High | Low | Low | Low | Low | Low | Low | High | Low |
Bennell et al11 | High | Low | High | Low | Low | Low | Low | Low | Low | High | Low |
Cobb, 200717 | Low | Low | High | Low | Low | High | Low | High | Low | Low | Low |
Kelsey et al13 | Low | Low | High | Low | Low | High | Low | Low | Low | Low | Low |
Nieves et al14 | Low | Low | High | Low | Low | High | Low | Low | Low | Low | Low |
Tenforde et al15 | High | Low | Low | Low | High | High | High | Low | Low | Low | Moderate |
Yagi et al16 | High | Low | Low | Low | High | Low | Low | Low | Low | High | Low |