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Table 4 Risk of bias assessment summary ratingsa

From: The impact of methamphetamine/amphetamine use on receipt and outcomes of medications for opioid use disorder: a systematic review

Author/pub year Participation Attritionb Prognostic factor measurement Outcome measurement Confounding Statistical analysis and reporting
Abrahamsson 2016 Moderate Low Low Moderate High Moderate
Banta-Green 2009 Low N/A Low Low Low Low
Daniulaityte 2020 Low N/A Low Low Low Low
Deck 2004 Low N/A Low Low Low Low
Deck 2005 Low N/A Low Low Low Low
Fairbairn 2012 Moderate N/A Low Low Moderate Moderate
Gjersing 2013 Low N/A Low Low High Low
Hall 2016 Low Low Moderate Low High Low
Hoang 2018 Low Moderate Moderate Low High Moderate
Hser 2014 Low N/A Low Low Moderate Low
Hui 2017 Low N/A Low Low High Moderate
Jones 2020 Low N/A Low Low Low Low
Kumar 2016 Low N/A Low Low Moderate Moderate
Kunøe 2010 Low Low Low Low Moderate Moderate
Liu 2017 Low Low Low Low High Moderate
Liu 2018 Moderate N/A Low Low High Low
Lo 2018 Low N/A Low Low Moderate Moderate
Logan 2019 Low N/A Moderate Low High Moderate
Manhapra 2017 Low N/A Moderate Moderate High Moderate
Manhapra 2018 Low N/A Moderate Moderate High Moderate
Manhapra 2020 Low N/A Moderate Moderate High Moderate
Michel 2017 Moderate Moderate Moderate Low High Moderate
Morgan 2018 Low Low Moderate Moderate Moderate Low
Peles 2008 Low N/A Low Low High Moderate
Peles 2015 Moderate N/A Low Low High Moderate
Pettes 2010 Moderate Low Moderate Low High Moderate
Potter 2013 Low High Low Low High Moderate
Proctor 2015 Low N/A Low Low Moderate Moderate
Proctor 2016 Low Moderate Low Low Moderate Moderate
Rhee 2019 Low N/A Moderate Low High Moderate
Schiff 2007 Low N/A Low Moderate Moderate Moderate
Schuman-Olivier 2014 Moderate N/A Low Low High Moderate
Senbanjo 2009 Moderate N/A Low Low High Low
Shiner 2017 Low Low Moderate Moderate Low Low
Skeie 2013 Moderate N/A Moderate Low High Low
Smyth 2018 Low High Moderate Low High Moderate
Thirion 2001 Low N/A Low Moderate High Moderate
Tsui 2020 Low N/A Low Low Moderate Low
White 2014 Low N/A Low Low High Low
  1. aBased on QUIPS risk of bias assessment instrument for prognostic factor studies; Hayden et al. [85]
  2. bAttrition domain was considered not applicable for cross-sectional studies and studies only examining retention/discontinuation as outcome of interest