Table 3.

Polytomous logistic regression model for initiation pathway.

Characteristic	Thelarche versus Synchronous OR (95% CI)	Pubarche versus Synchronous OR (95% CI)	Pubarche versus Thelarche OR (95% CI)
BMI at age 8
<5th percentile	0.79 (0.41, 1.49)	1.24 (0.58, 2.64)	1.58 (0.71, 3.55)
5th–85th percentile	Reference	Reference	Reference
85th–95th percentile	1.82 (1.39, 2.38)	0.67 (0.41, 1.07)	0.37 (0.23, 0.58)
≥95th percentile	2.65 (1.95, 3.60)	0.29 (0.12, 0.67)	0.11 (0.05, 0.25)
Child ethnic background
White	Reference	Reference	Reference
Nonwhite	0.47 (0.27, 0.80)	1.55 (0.87, 2.77)	3.23 (1.71, 6.45)
Mother's prepregnancy BMI
<18.5	0.64 (0.42, 0.99)	0.68 (0.37, 1.24)	1.05 (0.55, 1.99)
18.5–24.9	Reference	Reference	Reference
25.0–29.9	0.90 (0.68, 1.15)	0.60 (0.39, 0.94)	0.68 (0.44, 1.06)
≥30.0	1.13 (0.74, 1.73)	0.35 (0.13, 1.01)	0.31 (0.11, 0.89)
Birth order
First born	Reference	Reference	Reference
Second born	0.82 (0.66, 1.01)	0.95 (0.69, 1.29)	1.16 (0.85, 1.58)
Third born or later	0.72 (0.57, 0.90)	0.74 (0.53, 1.03)	1.03 (0.74, 1.44)