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Table 2 Risk of bias assessment

From: The effect of smoke-free legislation on the mortality rate of acute myocardial infarction: a meta-analysis

Study, year Intervention independent of other changes? Shape intervention effect pre-specified? Intervention unlikely to affect data collection? Knowledge of allocated interventions adequately prevented? Incomplete outcome data adequately assessed? Free from selective outcome reporting? Free from other risks of bias Risk of bias
Villalbí 2011 High Low Low Low Low Low Low Low
Fernando 2013 High Low Low Low Low High Low Moderate
Sericea Stallings-Smith 2013 High Low Low Low Low Low Low Low
Carl Bartecchi 2006 High Low Low Low Low Low High Moderate
Shetty, K. D 2009 High High Low Low Low Low High High
Dove 2010 High Low Low Low Low High Low Moderate
McAlister 2010 High Low Low Low High High High High
Brad Rodu 2012 High Low Low Low Low High High High
Tania 2016 High Low Low Low Low Low Low Low
TQ Thach 2016 High Low Low Low Low Low Low Low