Table 2.

Average ages of the subjects according to the classification types.

	n	Mean age (years)
Type Ia	200	43 ± 15.8
Type Ib	135	40.6 ± 13.9
Type IIa	75	37.5 ± 12.5
Type IIb	50	36 ± 13.2
Type IIIa	36	38.9 ± 12,8
Type IIIb	83	37.4 ± 15.5
Type IV	41	38.1 ± 17