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The overall incidence of morphology of HMC in two groups.
| Ω | ε | Ω-ε | ε-Ω | Hemispheres | |
|---|---|---|---|---|---|
| 20–40y | 116 (53.2) | 73 (33.5) | 28 (12.8) | 1 (0.05) | 218 |
| >40y | 197 (58.9) | 91 (27.3) | 44 (13.2) | 2 (0.06) | 334 |
There is a no significant difference in the distribution of morphology of HMC between the two groups (20–40years, >40years) (p = 0.4641, Chi-square test)..
