Table A2.
Checklist for Cohort Studies.
| . | 1995; Menticoglou |
2007; Cheng |
2009; Allen |
2009; Rouse |
2011; Li |
2012; Bleich |
2015; Altman |
2015; Hunt |
2017; Sandström |
2017; Ogunyemi | 2018; Souter |
2019; Infante |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. Were the two groups similar and recruited from the same population? | Unclear * | No * | No * | Unclear * | Unclear * | Unclear * | Unclear * | Unclear * | Unclear * | Unclear * | Unclear * | Unclear * |
| 2. Were the exposures measured similarly to assign people to both exposed and unexposed groups? | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| 3. Was the exposure measured in a valid and reliable way? | Yes | Yes | Yes | Yes | No | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| 4. Were confounding factors identified? | No | Yes | Yes | Yes | No | Yes | Yes | No | Yes | Yes | Yes | Yes |
| 5. Were strategies to deal with confounding factors stated? | No | Yes | Yes | Yes | No | Yes | Yes | No | Yes | Yes | No | Yes |
| 6. Were the groups/participants free of the outcome at the start of the study (or at the moment of exposure)? | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| 7. Were the outcomes measured in a valid and reliable way? | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| 8. Was the follow up time reported and sufficient to be long enough for outcomes to occur? | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| 9. Was follow up complete, and if not, were the reasons to loss to follow up described and explored? | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| 10. Were strategies to address incomplete follow up utilized? | NA | NA | Yes | NA | NA | NA | Yes | NA | Yes | NA | NA | Yes |
| 11. Was appropriate statistical analysis used? | Unclear | Yes | Yes | Yes | Unclear | Yes | Yes | Unclear | Yes | Yes | Unclear | Yes |
NA: not applicable, *: groups recruited from the same population.