Let's Just Check That Potassium One More Time . . . : Comment on "Last Orders: Follow-up of Tests Ordered on the Day of Hospital Discharge".

phone follow-up reduced the rate of adverse effects in this patient population. However, the effect on specific patient-perceived DRPs after hospital discharge has not been studied. Although the checklist was not validated, it was developed on the basis of literature search and a face validity procedure with experts. Patient-perceived DRPs at baselinewere significantlyhigher in the interventiongroupthan in the control group. We adjusted for this difference in our analysis.Controlpharmacistscouldhavebecomemoreconscious of the possibility of DRPs, thereby becoming more observant and active in resolving DRPs. This may have led to an underestimation of the effect of the intervention.