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Table 1 Quality assessment components and ratings for the EPHPP Instrument (Adapted with permission of the author) [19]

From: Sexual health risk reduction interventions for people with severe mental illness: a systematic review

Components Strong Moderate Weak
Selection Bias Very likely to be representative of the target population and participation rate >80% Somewhat likely to pre representative of the target population and participation rate between 60 to 79% All other responses or not stated
Study design Randomized controlled trial or controlled clinical trial Cohort analytic, case control, cohort or an interrupted time series All other designs or design not stated
Confounders Controlled for at least 80% of confounders Controlled for at least 60 to 79% of confounders Confounders not controlled for or not stated
Blinding Blinding of outcome assessors and study participants to intervention status and/or research question Blinding of either outcome assessors or study participants Outcome assessors and study participants are aware of intervention status and/or research question
Data collection methods Tools shown to be valid and reliable Tools shown to be valid but reliability not described No evidenced of validity or reliability
Withdrawals and dropouts Participants completing study (or follow-up rate) >80% Participants completing study (or follow-up rate) between 60 to 79% Participants completing study (or follow-up rate) <60% or withdrawals and dropouts not described