Table 1.
Comparison of general information between both groups (n, x̅±sd)
| Index | Observation group (n=75) | Control group (n=75) | χ2/t | P |
|---|---|---|---|---|
| Gender (n) | 0.108 | 0.742 | ||
| Male | 43 | 41 | ||
| Female | 32 | 34 | ||
| Age (Y) | 53.4±4.4 | 53.3±4.3 | 0.139 | 0.890 |
| BMI (kg/m2) | 23.6±3.3 | 22.6±3.2 | 1.884 | 0.062 |
| Operation types (n) | 0.287 | 0.963 | ||
| Cesarean section | 21 | 24 | ||
| Appendectomy | 18 | 17 | ||
| Hernia repair | 16 | 15 | ||
| Mastectomy | 10 | 8 | ||
| Surgical treatment of chest wall tumor | 10 | 11 |
Note: BMI: body mass index. χ2: statistical value of chi-square test; t: statistical value of t-test.