Table I.

Demographics of the patients of the three groups

	Male	Female	n	Mean age
Hypotrophic	7	13	20	22.7 (15–31, ±4.6)
Normal	6	14	20	26.2 (16–35, ±6.6)
Hypertrophic	2	8	10	26.3 (17–40, ±7.1)
Σ =	15	35	50	25.1 (15–40, ±6.1)