TABLE 2.

Testing breastfeeding outcomes for FN sample selection bias

	Breastfeeding interval (min)	SD	P value ≤e	Breastfeeding frequency	SD	P value ≤e
RS-SNa	235.44	124.10	0.16	2.00	0.93	0.24
RS-SNb	89.25	94.40		3.00	1.41
RB-BNc	78.41	37.66	0.001	5.78	2.05	0.001
RB-BNd	159.33	27.49		2.63	0.74

RS, routine solitary sleepers; RB, routine bedsharers; SN, solitary night; BN, bedsharing night.

^aPairs with FN data (n = 8).

^bPairs without FN data (n = 2).

^cPairs with FN data (n = 9).

^dPairs without FN data (n = 8).

^eResults of unpaired t-tests.