Table 2. Propensity score matching of preoperative variables.
| Parameter | AFU (n=40) | PIFT (n=40) | P value |
|---|---|---|---|
| Age | 59.3±11.2 | 60.2±11.7 | 0.639** |
| Gender | 0.597* | ||
| Male | 7 | 8 | |
| Female | 23 | 22 | |
| BMI | 19.5±2.3 | 20.7±2.0 | 0.772** |
| Histological type | 0.655* | ||
| SC | 3 | 6 | |
| AD | 37 | 34 | |
| Clinical TNM Stage | 0.371* | ||
| T1aN0M0 | 16 | 13 | |
| T1bN0M0 | 12 | 20 | |
| T1cN0M0 | 12 | 17 | |
| Tumor size | 0.371* | ||
| <1 cm | 16 | 13 | |
| 1–2 cm | 12 | 20 | |
| 2–3 cm | 12 | 17 | |
| Pulmonary Function | 0.842** | ||
| FEV1% | 75.4±11.6 | 77.6±12.1 | |
| DLCO% | 65.6±12.7 | 64.7±11.8 | |
| Fissure grade | |||
| III | 34 | 35 | 0.883* |
| IV | 6 | 5 | 0.778* |
| Comorbidity | |||
| Primary hypertension | 15 | 12 | 0.685* |
| Grade I | 7 | 5 | 0.878* |
| Grade II | 8 | 7 | |
| II type diabetic mellitus | 8 | 7 |
Data are mean ± standard deviation or N (percentage). *, McNemar’s test; **, paired Student’s t-test. FEV1, forced expiratory volume in the first second; DLCO, diffusing capacity of carbon monoxide; SC, squamous cell cancer; AD, adenocarcinoma; AFU, anterior fissureless uniport: PIFT, posterior intra-fissure triple-port; BMI, body mass index.