Table 1. Patients’ baseline and clinical characteristics.
| Characteristics | Unmatched patients | Matched patients | |||||
|---|---|---|---|---|---|---|---|
| Two ports (n=66) | Single port (n=77) | P value | Two ports (n=63) | Single port (n=63) | P value | ||
| Age (years) | 56.50±12.58 | 58.27±9.21 | 0.334 | 57.11±12.22 | 58.68±9.24 | 0.417 | |
| Female (%) | 18 (27.27) | 32 (41.56) | 0.081 | 17 (26.98) | 23 (36.51) | 0.339 | |
| BMI (kg/m2) | 22.44±2.89 | 21.86±3.13 | 0.254 | 22.04±3.01 | 21.99±3.06 | 0.919 | |
| FEV1 (L) | 1.98±0.38 | 2.05±0.45 | 0.320 | 1.98±0.38 | 1.99±0.40 | 0.883 | |
| Predicted FEV1 (%) | 84.38±15.53 | 86.06±14.91 | 0.511 | 84.28±15.83 | 85.05±14.85 | 0.779 | |
| CCI | 1.68±1.30 | 1.74±1.14 | 0.775 | 1.67±1.28 | 1.73±1.09 | 0.766 | |
| Tumor size (cm) | 4.28±1.67 | 3.83±1.61 | 0.103 | 4.21±1.66 | 3.92±1.57 | 0.314 | |
| Cell type (%) | 0.661 | 0.633 | |||||
| Adenocarcinoma | 53 (80.30) | 65 (84.42) | 51 (80.95) | 54 (85.71) | |||
| Squamous cell | 12 (18.18) | 12 (15.58) | 12 (19.05) | 9 (14.29) | |||
| Carcinoid tumor | 1 (1.52) | 0 | 0 | 0 | |||
| Pathological stage (%) | 0.222 | 0.750 | |||||
| Ia | 7 (10.61) | 16 (20.78) | 7 (11.11) | 10 (15.87) | |||
| Ib | 25 (37.88) | 23 (29.87) | 23 (36.51) | 20 (31.75) | |||
| IIa | 12 (18.18) | 11 (14.29) | 12 (19.05) | 11 (17.46) | |||
| IIb | 2 (3.03) | 8 (10.39) | 2 (3.17) | 5 (7.94) | |||
| IIIa | 19 (28.79) | 17 (22.08) | 18 (28.57) | 15 (23.81) | |||
| IIIa | 1 (1.51) | 2 (2.59) | 1 (1.59) | 2 (3.17) | |||
FEV1, forced expiratory volume in 1 second; CCI, Charlson comorbidity index.