Table 2. Quality of cohort, observational and cross-sectional studies Did the Did the Was the cohort Was the Was the Have the Was the follow Was the follow Quality address a authors use an recruited in an exposure outcome authors taken up of subjects up of subjects rating clearly focused appropriate appropriate accurately accurately account of the complete long enough? issue? method to way? measured to measured to potential enough? answer their minimise bias? minimise bias? confounding question? factors in the design and/or in their analysis? Alonso-Echanove et al., ? F 2003 Amaravadi et al., 2000 G X N/A N/A F Benbenbishty et al., 2010 Blegen et al., 2011 X X X X N/A N/A P
Table 2. Quality of cohort, observational and cross-sectional studies Did the address a clearly focused issue? Did the authors use an appropriate method to answer their question? Was the cohort recruited in an appropriate way? Was the exposure accurately measured to minimise bias? Was the outcome accurately measured to minimise bias? Have the authors taken account of the potential confounding factors in the design and/or in their analysis? Was the follow up of subjects complete enough? Was the follow up of subjects long enough? Quality rating Alonso-Echanove et al., 2003 ? F Amaravadi et al., 2000 G Benbenbishty et al., 2010 X N/A N/A F Blegen et al., 2011 X X X X N/A N/A P
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