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Demographic characteristics of the three groups
| Demographic | Non-KBD areas | KBD areas | H/χ 2 | P | |
|---|---|---|---|---|---|
| EC | IC | KBD | |||
| Case number (n) | 83 | 86 | 91 | NA | NA |
| Age (year) | 58.96 ± 5.81 | 59.58 ± 5.11 | 60.38 ± 5.08 | 1.558a | 0.213a |
| Sex, male/female (n) | 33/50 | 36/50 | 37/54 | 0.078b | 0.962b |
| Grades (n) | 83 | Grade 0, 86 | Grade I, 79; grade II, 12 | NA | NA |
NA not applicable
aANOVA
bChi-square test
