Effects of Shared Electronic Health Record Systems on Drug-Drug Interaction and Duplication Warning Detection

Table 2

Number of persons and prescriptions per person in study cohort.

Age group	Persons in; study cohort	Prescriptions in; study cohort	Prescriptions per person and year
			1st quarter	Median	Mean	3rd quarter
20–29	140,961	893,383	2	4	6.3	7
30–39	164,533	1,439,362	2	4	8.8	9
40–49	194,053	2,530,847	3	6	13.0	14
50–59	167,264	3,961,860	5	13	23.7	29
60–69	177,894	6,459,356	10	24	36.3	49
70–79	118,528	6,209,350	19	40	52.4	73
80–89	69,785	4,651,582	29	56	66.7	92
90+	10,744	777,134	31	59	72.3	99
Sum	1,043,762	26,922,874