TABLE 2.

Dietary intake in firstborn and secondborn siblings at age 6 mo

				P value for sibling difference		Spearman correlation between siblings
Category	Dyads, n	FB1	SB1	Wilcoxon signed rank test	Generalized linear mixed model2	ρ	P
Frequency of intake, times per day
Fruit	933	0.6 ± 0.8	0.9 ± 0.9	0.07	0.50	0.29	0.004
Vegetables	97	1.2 ± 1.2	1.2 ± 1.1	0.54	0.70	0.29	0.004
Grains	97	0.9 ± 0.9	1.0 ± 1.0	0.47	0.56	0.21	0.04
Number of foods introduced
Total	97	8.2 ± 5.9	9.5 ± 6.8	0.04	0.88	0.42	<0.0001
Fruits	97	2.5 ± 2.9	3.3 ± 3.2	0.01	0.41	0.46	<0.0001
Vegetables	97	3.6 ± 2.4	4.1 ± 3.0	0.15	0.91	0.41	<0.0001

¹Values are mean ± SD.

²Adjusted for study group and exact age at FFQ completion.

³Excluded 2 FB and 2 SB (n = 4 dyads total) with reported fruit intake >6 times per day (>4 SD above mean).

FB, firstborn; SB, secondborn.