Table 1. Demographic characters of patients included.
| Feature | SV-VATS (n=15) | SD/% | MV-VATS (n=17) | SD/% | P |
|---|---|---|---|---|---|
| Age (year) | 0.48 | ||||
| Mean | 63.90 | 11.76 | 67.43 | 14.40 | |
| Gender | 0.76 | ||||
| Male | 7 | 47% | 7 | 41% | |
| Female | 8 | 53% | 10 | 59% | |
| BMI (kg/m2) | 0.51 | ||||
| Mean | 22.01 | 3.67 | 23.43 | 2.25 | |
| Preoperative lung function of predicted (%) | 0.87 | ||||
| FVC | 76.7 | 11.2 | 74.3 | 13.6 | 0.43 |
| FEV1 | 62.2 | 10.8 | 59.3 | 12.4 | 0.69 |
| FEV1/FEV | 59.9 | 16.7 | 58.3 | 15.6 | 0.56 |
| Smoking history | |||||
| Smoker (past and current) | 12 | 80% | 14 | 93% | |
| Non-smoker | 3 | 20% | 3 | 7% | |
| Comorbidity | 0.77 | ||||
| Hypertension | 7 | 47% | 9 | 53% | |
| Diabetes | 2 | 13% | 1 | 6% | |
| Coronary heart disease | 2 | 13% | 3 | 18% | |
| COPD | 10 | 67% | 13 | 76% | |
| ASA status class | 0.62 | ||||
| I | 0 | 0% | 0 | 0% | |
| II | 14 | 93% | 15 | 85% | |
| III | 1 | 7% | 2 | 12% | |
| Tumor position | 0.44 | ||||
| Upper mediastinum | 3 | 20% | 5 | 29% | |
| Anterior mediastinum | 5 | 33% | 7 | 42% | |
| Middle mediastinum | 5 | 33% | 5 | 29% | |
| Posterior mediastinum | 2 | 14% | 0 | 0% | |
| Incision laterality | 0.49 | ||||
| Left | 8 | 53% | 7 | 41% | |
| Right | 7 | 47% | 10 | 59% | |
| Lesion length (cm) | 0.55 | ||||
| Mean | 5.12 | 1.43 | 5.27 | 1.63 | |
| Pathology | 0.68 | ||||
| Thymoma | 4 | 27% | 5 | 29% | |
| Neurogenic tumors | 2 | 14% | 1 | 6% | |
| Cysts | 4 | 27% | 3 | 18% | |
| Teratoma | 1 | 7% | 0 | 0% | |
| Fibroma | 4 | 27% | 8 | 47% | |
SV-VATS, spontaneous ventilation video-assisted thoracic surgery; MV-VATS, mechanical ventilation video-assisted thoracic surgery; BMI, body mass index; FVC, forced vital capacity; FEV1, forced expiratory volume in 1 second; ASA, American Society of Anesthesiologists; SD, standard deviation; COPD, chronic obstructive pulmonary diseases.