Evaluation of the GP Super Clinics Program 2007-2008

3.3 Sample Sizes

Page last updated: 2012

3.3.1 Patient Survey

Assuming a design effect of 1.3, a sample size of 500 patients would allow estimation of proportions with 95% confidence intervals within 5% of the point estimate. At a response rate of 60%, it was estimated that 840 patients should be approached to participate in the survey.

3.3.2 Clinician Survey

It was anticipated that approximately 140 clinicians would work across the seven operational GP Super Clinics. Assuming a minimum response rate of 50%, the evaluation would be able to estimate proportions with 95% confidence intervals within 12% of the point estimate.