Table 2.

Mean ages at reaching various pubertal stages in healthy Iranian girls. Results are presented as mean, the 95% confidence interval, and the lower and upper bounds (equal to ±2 SDs).

	Mean	95% CI	±2 SD
B2+	10.10	10.00-1021	6.96-13.23
B3+	11.62	11.51-11.74	8.08-15.16
B4+	13.55	13.44-13.66	9.51-17.58
B5+	14.92	14.84-14.99	11.28-18.55
Menarche	12.55	12.51-12.60	9.82-15.27
P2+	9.83	9.94-9.73	6.65-13.01
P3+	11.60	11.48-11.72	8.30-14.90
P4+	13.27	13.16-13..37	9.37-17.17
P5+	14.96	14.89-15.03	11.38-18.54