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各组患者基本特征比较
Comparison of gender distribution, age and BMI among the 3 groups
| Item | NERD | RH | FH | χ2/F | P |
| Number[n (%)] | 35 (44.3%) | 16 (20.25%) | 28 (35.45%) | ||
| Male/female | 19/16 | 8/8 | 8/20 | 4.432 | 0.109 |
| Age (year) | 53.43±9.59 | 47.47±12.51 | 49.39±9.50 | 2.221 | 0.105 |
| BMI (kg/m2) | 23.60±2.92 | 22.14±3.05 | 21.39±2.74 | 4.808 | 0.011* |
