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Demographics and clinical characteristics of the two groups.
| CO2 group (n = 22) | Gasless group (n = 20) | P | |
|---|---|---|---|
| Mean age (years) | 31.1 ± 5.6 | 32.0 ± 8.5 | 0.680 |
| Gender | 1.000 | ||
| Female (%) | 20 (95.5%) | 19 (95.0%) | |
| Tumor diameter (cm, average diameter) | 1.0 ± 0.3 | 1.0 ± 0.2 | 0.494 |
| Pre-operative clinicopathological diagnosis | 0.753 | ||
| Benign | 4 | 2 | |
| Malignant | 18 | 18 |
