| Is the aim of the study clearly described? | Are the main outcomes to be measured clearly described in the introduction or methods section? | Did the authors describe how the population was selected? | Were the subjects asked to participate in the study representative of the entire population from which they were recruited? | Are the characteristics of the population included in the study clearly described? | Are the interventions of interest clearly described? | Are the main findings of the study clearly described? | Does the study provide estimates of the random variability in the data for the main outcomes? | Have the characteristics of subjects lost to follow-up been described? | Have actual probability values been reported? | Were the statistical tests used to assess the main outcomes appropriate? | Are the findings presented clearly, objectively, and in sufficient detail to enable the reader to judge the results for himself/herself? | Did the investigators avoid introducing new results in the discussion? | Did the investigators consider all possible logical interpretations of their results? | Are the results adequately compared to previous studies in this area? | Are the conclusions clearly stated? | Are conclusions substantiated by the data that are presented in the results section? | Are generalizations confined to the population from which the sample was drawn? | Are the limitations of the study considered and were they taken into consideration when conclusions were drawn? | Are recommendations for future research made? | |
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| Cabarez | Y | Y | Y | Y | U | Y | Y | U | U | Y | Y | N | Y | N | Y | Y | Y | Y | N | Y |
| Carmichael | Y | Y | U | U | Y | Y | Y | Y | U | Y | Y | Y | Y | Y | N | Y | Y | Y | Y | Y |
| Hawala-Druy | Y | Y | Y | Y | Y | Y | Y | Y | U | Y | Y | Y | Y | Y | N | Y | Y | Y | Y | Y |
| Kelley | Y | Y | Y | Y | Y | Y | Y | Y | U | Y | Y | Y | Y | Y | N | Y | Y | Y | Y | Y |
| Loeb | Y | Y | Y | Y | Y | Y | Y | Y | U | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y |
| McGarry | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y |
| Rosen | Y | Y | Y | Y | U | Y | Y | N | N | N | U | Y | Y | Y | N | Y | Y | Y | Y | Y |
| Strong | Y | Y | Y | N | Y | Y | Y | Y | N | Y | Y | Y | Y | Y | Y | Y | Y | Y | N | Y |
| Thomas | Y | Y | Y | Y | N | Y | Y | Y | N | Y | Y | Y | Y | N | Y | Y | Y | Y | N | Y |
| Van der Elst | Y | Y | Y | N | Y | Y | Y | Y | N | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y |
| Wylie | Y | Y | Y | Y | N | Y | Y | N | U | U | U | Y | Y | N | N | Y | Y | Y | N | N |
| Young | Y | Y | Y | Y | Y | Y | Y | N | N | Y | Y | Y | Y | Y | N | Y | Y | Y | Y | Y |
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