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Table 1 Ottawa rating for included studies: (* OR ** means criteria fulfilled/Maximum score =9)

From: Red cell distribution width and preeclampsia: a systematic review and meta-analysis

Study Is the case definition adequate? Selection Selection of Controls Definition of Controls Comparability Ascertainment of exposure Outcome Non-response rate Total Score
Representativeness of the cases Comparability of cases and controls Same method of ascertainment
Çintesun, et al * * * * ** * * 8
Elgari, et al * * * * ** * * 8
Prasmusinto, et al * * * * * * * 7
Yücel and Ustun * * * * ** * * 8
Reddy, et al * * * * ** * * 8
Sen-Yu W, Chao X. * * * * ** * * 8
Yılmaz, et al * * * * ** * * 8
Avcıoğlu, et al * * * * * * * 7
Abdullahi, et al * * * * ** * * 8
Kurt, et al * * * * ** * * 8
Huang, et al * * * * ** * * 8