Figure 4(b).

Quality assessment of service evaluation and other type of studies.

Questions:

Q1. Is the sample representative of patients in the population as a whole?

Q2. Are the patients at a similar point in the course of their condition/illness?

Q3. Has bias been minimized in relation to selection of cases and controls?

Q4. Are confounding factors identified and strategies to deal with them stated?

Q5. Are outcomes assessed using objective criteria?

Q6. Is follow-up carried out over a sufficient time period?

Q7. Are the outcomes of people who withdrew described and included in the analysis?

Q8. Are outcomes measured in a reliable way?

Q9. Is appropriate statistical analysis used?