TABLE 3.

Dietary intake and variety in firstborn and secondborn siblings at age 12 mo

				P value for birth-order 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	993	2.6 ± 1.6	3.2 ± 2.0	0.04	0.03	0.37	0.0002
Vegetables	100	2.8 ± 1.6	2.9 ± 1.8	0.89	0.91	0.39	<0.0001
Dairy	100	3.0 ± 2.1	3.1 ± 2.5	0.68	0.72	0.44	<0.0001
Meat/poultry/fish	100	0.8 ± 0.7	1.0 ± 0.8	0.11	0.20	0.40	<0.0001
Grains	100	2.3 ± 1.3	2.4 ± 1.4	0.71	0.90	0.46	<0.0001
Variety, number of unique items consumed in past week
Fruit	100	7.3 ± 3.4	8.1 ± 3.6	0.03	0.05	0.27	0.007
Vegetables	100	9.1 ± 3.4	9.2 ± 3.9	0.70	0.79	0.31	0.002

¹Values are mean ± SD.

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

³Excluded 1 SB reporting fruit >16 times per day (>5 SDs above mean).

FB, firstborn; SB, secondborn.