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Table 1 Quality Assessment Components and Ratings for EPHPP Instrument

From: Are workplace health promotion programs effective at improving presenteeism in workers? a systematic review and best evidence synthesis of the literature

Components Strong Moderate Weak
Selection bias Very likely to be representative of target population; greater than 80% participation rate Somewhat likely to be representative of target population; 60-79% participation rate All other responses or not stated
Design Randomized Control Trial, Clinical Control Trial Cohort analytic, case-control, cohort, or interrupted time series All other designs or design not stated
Confounders Controlled for at least 80% of confounders Controlled for 60-79% of confounders Confounders not controlled for, or not stated
Blinding Blinding of outcome assessor & participants to intervention &/or research question Blinding of either outcome assessor or participants Outcome assessor & participants are aware of intervention &/or research question
Data collection methods Tools are valid & reliable Tools are valid but reliability not described No evidence of validity or reliability
Withdrawals & dropouts Follow-up rate of > 80% of participants Follow-up rate of 60-79% of participants Follow-up rate of < 60% of participants or withdrawals & dropouts not described
  1. Copyright 2004 by John Wiley and Sons. Adapted with permission of the author.