Table 3 Results of the quality appraisal of the observational studies according to CASP
From: Thiazides in the management of hypertension in older adults – a systematic review
Source | Focused issue | Appropriate method | Recruitment | Selection of controls | Exposure measured | Outcome measured | Identified confounding factors? | Confounding factors in design/analysis | Follow up complete | Follow up long | Believe results | Results be applied | Results fit evidence |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dhalla et al. 2013 [29] | Y | Y | Y | Y | U | Y | Y | Y | Y | Y | Y | U | N |
Gurwitz et al. 1997 [35] | Y | Y | Y | Y | N | N | Y | Y | U | Y | Y | N | Y |
LaCroix et al. 1990 [42] | Y | U | Y | Y | N | U | Y | Y | U | U | Y | U | N |
Weiland et al. 1997 [56] | Y | U | Y | Y | U | U | N | N | Y | Y | U | Y | U |