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Comparison of general data between the two groups
| Item | Group A | Group B | P value |
|---|---|---|---|
| Number | 30 | 32 | |
| Age (year) | 52.6 ± 8.3 | 55.6 ± 10.1 | 0.768 |
| Man/woman | 19/11 | 21/11 | 0.851 |
| Hypertension | 14 | 16 | 0.793 |
| Diabetes mellitus | 9 | 7 | 0.465 |
| Hyperlipemia | 5 | 6 | 0.830 |
| Smoking | 8 | 10 | 0.691 |
| Alcoholism | 4 | 4 | 0.922 |
| Record of formal schooling | |||
| Junior high school and below | 22 | 23 | 0.782 |
| Senior middle school | 5 | 7 | |
| Universities and above | 3 | 2 | |
| Place of residence: rural / urban | 21/9 | 22/10 | 0.915 |
