Author | Representativeness of exposed cohort | Selection of non-exposed cohort | Ascertainment of harm reduction | Outcome of interest absent at start of study | Comparability of cohorts | Assessment of outcome with independency | Adequacy of follow-up length |
---|---|---|---|---|---|---|---|
Alburaih (2018) [33] | * | * | * | ** | * | * | |
Alexandridis (2017) [11] | * | * | * | * | * | * | |
Alexandridis (2018) [34] | * | * | * | * | * | * | |
Allen (2016) [36] | * | * | * | * | * | * | |
Fulton-Kehoe (2015) [37] | * | * | * | * | * | * | * |
Ghobadi (2018) [38] | * | * | * | * | * | * | |
Gugelmann (2013) [39] | * | * | * | * | * | ||
Hartung (2018) [40] | * | * | * | * | * | * | * |
Jurecska (2012) [41] | |||||||
Kahler (2017) [42] | * | * | * | * | ** | * | * |
Maughan (2015) [43] | * | * | * | * | * | ||
Olsen (2016) [44] | * | * | * | * | * | * | |
Pace (2017) [45] | * | * | * | * | * | * | |
Svenson (2007) [46] | * | * | * | * | * | * | |
Whiteside (2017) [47] | * | * | * | * | * |