Issues that may affect the success of this study are as follows: the acceptability of the study to the patient population of interest, whether the consent process itself would increase the screening rate as compared to the screening rate for the year 2000, and publication of new guidelines. It is unlikely that the consent process would be enough to increase screening rates alone as most studies on physician behaviour changes have shown that multiple interventions are required.11 The Clinical Practice Guideline Group of the CDA have started to meet to discuss an update of the guideline. Evidence published since the publication of the guidelines in 1998 lends more support to the recommendation to screen with a 2 hour OGTT.