Table 2.

Comparisons of infant feeding characteristics by mode of conception, Upstate KIDS study (2008-2010)

	No Fertility Treatment N=3,230		Fertility Treatment N=1,361		P
	n	%	n	%
Breastfeeding until
4 monthsa	1344	48.0	656	54.3	<0.001
Missing	430		153
8 months	743	35.2	337	32.1	0.087
Missing	1119		312
12 months	386	21.8	159	17.7	0.012
Missing	1459		460
Formula feeding at
4 months	2232	69.7	939	69.7	0.986
Missing	27		13
8 months	1815	79.9	923	84.1	0.003
Missing	958		264
12 months	901	45.5	498	50.0	0.021
Missing	1249		364
Providing solids at or before
4 months	1994	61.7	804	59.1	0.092
Missing	0		0
8 months	2162	95.0	1067	97.3	0.002
Missing	954		264
12 months	1951	98.5	988	99.1	0.166
Missing	1249		364
Providing juice at or before
4 months	593	18.7	165	12.3	<0.001
Missing	51		23
8 months	1268	56.4	492	45.3	<0.001
Missing	981		274
12 months	1459	76.0	637	66.6	<0.001
Missing	1309		405
Infant's appetite at 4 months
Very good/Good	3115	97.3	1301	96.3	0.08
Medium/Poor	87	2.7	50	3.7
Missing	28		10
Breastfeeding at hospital dischargeb
Breast milk only	1860	58.7	877	65.4	<0.001
Formula only	735	23.2	207	15.4
Both breast milk and formula	565	17.8	253	18.9
Other (e.g., intravenous feeding)	9	0.3	4	0.3
Missing	61		20
Maternal concerns about feeding at 4 monthsc
Yes	381	12.1	178	13.5	0.20
Missing	69		38
Food allergies diagnosed by 12 months
Yes	83	4.5	35	3.7	0.36
Missing	1370		421

N, n=number; P=p-value

^aCorresponds to the targeted timing of postpartum questionnaires

^bReflective of feeding within the first 5 days of life

^cIncludes: infant has difficulty staying alert, is easily distracted from feeding, falls asleep during sucking, has weak sucking, sleeps through feeding times