Table 2.

Quality assessment of warfarin studies in patients with end stage renal disease and atrial fibrillation

Study	Overall Risk of Bias	Bias due to confounding	Bias in selection of participant into the study	Bias in measurement of interventions	Bias due to departures from intended interventions	Bias due to missing data	Bias in measurement of outcomes	Bias in selection of the reported results
Chan 2009 [30]	Serious	Moderate	Serious	Low	Low	Low	Low	Moderate
Lai 2009 [32]	Critical	Critical	Serious	Serious	Serious	No info	Low	Moderate
Wizemann 2010 [33]	Critical	Serious	Critical	Moderate	No info	No info	Moderate	Serious
Winkelmayer 2011 [22]	Moderate	Moderate	Low	Low	Low	Low	Low	Moderate
Olesen 2012 [23]	Serious	Serious	Low	Low	Serious	Low	Low	Moderate
Khalid 2013 [34]	Critical	Critical	Critical	Moderate	Serious	No info	Low	Moderate
Wakasugi 2014 [29]	Critical	Critical	Serious	Low	Low	No info	Low	Moderate
Bonde 2014 [24]	Serious	Serious	Low	Moderate	Serious	Low	Low	Serious
Carrero 2014 [25]	Moderate	Moderate	Low	Low	Low	Low	Low	Moderate
Chen 2014 [26]	Moderate	Moderate	Low	Low	Low	Low	Low	Moderate
Friberg 2014 [13]	Serious	Moderate	Serious	Low	Low	Low	Low	Moderate
Shah 2014 [27]	Moderate	Moderate	Low	Low	Low	Low	Low	Moderate
Genovesi 2015 [31]	Serious	Moderate	Serious	Low	Low	No info	Low	Moderate
Chan KE 2015 [20]	Serious	Moderate	Low	Low	Serious	Low	Low	Moderate
Chan PH 2015 [21]	Critical	Serious	Critical	Low	Serious	Low	Moderate	Moderate
Shen 2015 [28]	Moderate	Moderate	Low	Low	Low	Low	Low	Moderate
Wang 2015 [14]	Critical	Serious	Critical	Low	Serious	No info	Moderate	Serious
Yodogawa 2015 [35]	Critical	Serious	Critical	Moderate	No info	Low	Moderate	Moderate
Findlay 2016 [15]	Critical	Critical	Critical	No info	Critical	No info	Moderate	Moderate
Tanaka 2016 [16]	Critical	Critical	Critical	Low	Critical	Low	Moderate	Moderate