Table 1 Effective Public Health Practice Project Quality Assessment Components and Ratings
Components | Strong | Moderate | Weak |
|---|---|---|---|
Selection Bias | Very Likely to be representative of the target population and greater than 80% participation rate | Somewhat likely to pre representative of the target population and 60–79% participation rate | All other responses or not stated |
Design | RCT or CCT | Cohort analytic, case control, cohort or an interrupted time series | All other designs of design not stated |
Confounders | Controlled for at least 80% of confounders | Controlled for at least 60–79% of confounders | Confounders not controlled for or not stated |
Blinding ` | Blinding on outcome assessor and study participants to intervention status and/or research question | Blinding of either outcome assessor or study participants | Outcome assessor and study participants are aware of intervention status and/or research question |
Data collection methods | Tools are valid and reliable | Tools are valid but reliability not described | No evidenced of validity or reliability |
Withdrawals and 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 and dropouts not described |