Table 2 Quality of controlled studies passing eligibility criteria presented by stratification of research methodology and Newcastle-Ottawa scale a (for non-randomised observational studies)
Author/Year | Design | Randomisation | Blinding | Sample size estimation | Analysis | Newcastle-Ottawa scale | ||
|---|---|---|---|---|---|---|---|---|
Selection | Comparability | Outcome | ||||||
Barad D, et al. (2007) | Case -control study | None | None | N/A | Intention to treat analysis | *** | * | ** |
Wiser A, et al. (2010) | Randomised controlled study | -Computer generated random numbers | None | Not done | Intention to treat analysis | Â | Â | Â |
| Â | Â | - allocation concealment by sealed envelope | Â | Â | (No-drop out) | Â | Â | Â |
Gleicher N, et al. (2010) | Case -control study | None | None | N/A | Intention to treat analysis | *** | * | *** |