Table 2: Average ages of the subjects according to the classification types.

Mean age (years)

Type Ia200 43 ± 15.8
Type Ib13540.6 ± 13.9
Type IIa7537.5 ± 12.5
Type IIb5036 ± 13.2
Type IIIa3638.9 ± 12,8
Type IIIb8337.4 ± 15.5
Type IV4138.1 ± 17