Table 1.

Comparison of Number of Medications Obtained by Different Methods for 50 Patients

	Total No. of Medications (Mean/Patient)
Category of Medication	By Interview	PIP Data	Mean Difference per Patient
All	378 (7.6)	235 (4.7)	2.9*
Prescription only	282 (5.6)	225 (4.5)	1.1*

PIP = Pharmaceutical Information Program, SD = standard deviation.

^*p < 0.001.