Table 5.

Mean Number of Years Between Sexual Maturity Stages Among Boys

	Genital		Pubic Hair
Sexual Maturity Stage	Years Between Stages, Mean (SD) [Range]	95% Confidence Interval	Years Between Stages, Mean (SD) [Range]	95% Confidence Interval
2 to 3
All participants	2.0 (0.6) [0.7–4.2]	2.0–2.1	1.3 (0.6) [0.2–4.1]	1.2–1.3
White	2.0 (0.6) [0.7–4.2]	2.0–2.1	1.3 (0.6) [0.2–3.2]	1.2–1.3
Black	2.1 (0.6) [0.7–3.8]	1.9–2.2	1.4 (0.7) [0.3–4.1]	1.2–1.6
3 to 4
All participants	1.1 (0.5) [0.2–2.7]	1.1–1.2	0.9 (0.5) [0.2–2.7]	0.9–1.0
White	1.1 (0.5) [0.2–2.7]	1.1–1.2	0.9 (0.5) [0.2–2.7]	0.9–1.0
Black	1.2 (0.5) [0.4–2.5]	1.1–1.3	1.1 (0.5) [0.2–2.5]	1.0–1.2
4 to 5
All participants	1.4 (0.6) [0.3–4.9]	1.3–1.4	1.4 (0.6) [0.3–5.0]	1.4–1.5
White	1.3 (0.5) [0.3–3.6]	1.3–1.4	1.4 (0.6) [0.3–3.5]	1.3–1.5
Black	1.5 (0.8) [0.3–4.9]	1.3–1.7	1.6 (0.7) [0.4–5.0]	1.4–1.8
2 to 5
All participants	4.5 (0.8) [2.7–6.9]	4.5–4.6	3.6 (0.9) [1.6–6.6]	3.6–3.7
White	4.5 (0.8) [2.7–6.6]	4.4–4.6	3.6 (0.8) [1.6–5.7]	3.5–3.7
Black	4.7 (0.9) [2.9–6.9]	4.5–5.0	4.1 (1.1) [1.8–6.6]	3.8–4.3