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General information of three groups of patients.
| MP group | SP group | DE group | F/χ2 value | P value | |
|---|---|---|---|---|---|
| n | 193 | 165 | 78 | — | — |
| Gender (M/F) | 99/94 | 86/79 | 41/37 | 0.045 | P > 0.05 |
| Age (years) | 56.8 ± 7.1 | 56.3 ± 7.3 | 57.2 ± 8.4 | 0.003 | P > 0.05 |
| BMI (kg/m2) | 21.6 ± 4.2 | 22.4 ± 3.9 | 21.7 ± 4.6 | 1.340 | P > 0.05 |
| Education (years) | 10.8 ± 4.2 | 10.5 ± 4.5 | 11.3 ± 3.6 | 0.822 | P > 0.05 |
M: male; F: female; BMI: body mass index.
