Table 3.

Results from multivariable Cox proportional hazards regression models examining the effects of father absence on onset of breast and pubic hair development.

Factor	Coefficient	HR (95%CI)	p-value
Breast Onset
Father absence	0.68	2.0 (0.9 – 4.2)	0.08
African American	0.58	1.8 (1.2 – 2.7)	0.01
Low income(<=50K)	0.67	1.9 (1.4 – 2.8)	0.00
BMI Z-score	0.36	1.4 (1.2 – 1.7)	0.00
Father absence * African American	0.23	1.3 (0.6 – 2.7)	0.55
Father absence * Low income	−1.17	0.3 (0.1 – 0.7)	0.00
Pubic Hair Onset
Father absence	−0.02	1.0 (0.3 – 2.9)	0.97
African American	1.03	2.8 (1.8 – 4.4)	0.00
Low income (<=50K)	0.24	1.3 (0.8 – 2.0)	0.27
BMI Z-score	0.27	1.3 (1.1 – 1.6)	0.00
Father absence * African American	1.08	2.9 (1.0 – 8.5)	0.047
Father absence * Low income	−0.92	0.4 (0.2 – 1.0)	0.06