Table 1. Demographic, anthropomorphic, hormonal, and reproductive characteristics of the cohort.

		Father
		No		Yes
Characteristic		n	Mean (S.D.) or %	n	Mean (S.D.) or %	p
Age (yrs)		97	34.3 (6.0)	75	43.6 (10.3)	<0.01
Height (m)		95	1.80 (0.08)	74	1.78 (0.08)	0.30
Weight (kg)		95	96.0 (24.0)	73	91.8 (18.3)	0.21
BMI		95	29.8 (7.3)	73	28.9 (5.7)	0.38
Testosterone (nmol/L)		89	10.9 (4.5)	22	11.9 (5.2)	0.36
FSH (mIU/mL)		89	8.7 (7.9)	17	5.2 (3.0)	0.08
LH (mIU/mL)		84	4.9 (3.2)	17	3.6 (1.5)	0.09
Races*	White	61	62.9	49	65.3	0.32
	African American	12	12.4	9	12.0
	Hispanic	10	10.3	12	16.0
	Asian	10	10.3	2	2.7
	Other	4	4.1	3	4.0
Months Trying		85	25.2 (22.0)		N.A.

Comparisons made using ANOVA for continuous variables and Chi-squared for categorical variables with relevant p value displayed.