Table 2.

Number of Events and Rates of Morbidity per 100 Person-Years (P-Y), PEPI-Malawi Study, Blantyre, Malawi, 2004–09

Age interval	Number of infants by BF status	Total person-years	Any illness/hospital Admission since last visit	Malnutrition
			# Events Rate per 100 (95%CI)	# Events Rate per 100 (95%CI)
6–9 mos	BF N = 549	126.6	65 51.3 (39.6–65.4)	26 20.5 (13.4–30.1)
	NBF N = 1212	216.3	301 139.1 (123.9–155.8)	92 42.5 (34.3–52.2)
9–12 mos	BF N = 317	75.7	40 52.8 (37.8–71.0)	22 29.1 (18.2–44.0)
	NBF N = 1316	322.8	291 90.2 (80.1–101.1)	122 37.8 (31.4–45.1)
12–15 mos	BF N = 212	49.6	15 30.2 (16.9–49.97)	10 20.2 (9.7–37.1)
	NBF N = 1331	316.4	212 67.0 (58.3–76.7)	142 44.9 (37.8–52.9)

NOTE. Rates of morbidity calculated dividing number of events by total person-years × 100. BF, Breastfeeding; NBF, Not breastfeeding.