Table 1.
Baseline clinical characteristics of patients.
| Variables | RATS (n=15) | VATS (n=31) | p-value |
|---|---|---|---|
| Gender, n (%) | 0.647 | ||
| Male | 14 (93.33) | 26 (83.87) | |
| Female | 1 (6.67) | 5 (16.13) | |
| Age, years, mean ± SD | 61.27 ± 7.85 | 61.42 ± 8.14 | 0.995 |
| Smoking history, n (%) | 0.901 | ||
| Ever | 9 (60.00) | 18 (58.06) | |
| Never | 6 (40.00) | 13 (41.94) | |
| Comorbidity, n (%) | 0.933 | ||
| Yes | 6 (40.00) | 12 (38.71) | |
| No | 9 (60.00) | 19 (61.29) | |
| BMI, kg/m2, mean ± SD | 24.02 ± 2.41 | 24.40 ± 2.91 | 0.513 |
| Pulmonary function, mean ± SD | |||
| FEV1 (% of predicted) | 94.74 ± 12.61 | 92.36 ± 11.34 | 0.83 |
| DLCO (% of predicted) | 88.59 ± 26.46 | 87.49 ± 17.94 | 0.794 |
| Serum albumin level, g/L, mean ± SD | 41.47 ± 3.50 | 41.42 ± 2.57 | 0.644 |
| Peripheral WBC count, (×109/L), mean ± SD | 6.22 ± 2.03 | 6.44 ± 1.40 | 0.715 |
| Invasive mediastinal staging, n (%) | 12 (80.00) | 26 (83.87) | 1 |
| Tumor anatomical site, n (%) | 0.691 | ||
| Right/Left upper lobe | 9 (60.00) | 22 (70.97) | |
| Middle lobe | 2 (13.33) | 2 (6.45) | |
| Right/Left lower lobe | 4 (26.67) | 7 (22.58) | |
| Tumor location, n (%) | 0.603 | ||
| Central | 7 (46.67) | 17 (54.84) | |
| Peripheral | 8 (53.33) | 14 (45.16) | |
| Tumor histology, n (%) | 0.913 | ||
| Adenocarcinoma | 7 (46.67) | 15 (48.39) | |
| Squamous cell carcinoma | 8 (53.33) | 16 (51.61) | |
| Pre-induction clinical stage, n (%) | 1 | ||
| IIB | 4 (26.67) | 8 (25.81) | |
| IIIA | 5 (33.33) | 11 (35.48) | |
| IIIB | 6 (40.00) | 12 (38.71) | |
| Neoadjuvant cycles, n (%) | 1 | ||
| On or two | 3 (20.00) | 8 (25.81) | |
| Three or more | 12 (80.00) | 23 (74.19) | |
| Objective radiographic response, n (%) | 8 (53.33) | 17 (54.84) | 0.923 |
| Pre-operative clinical stage, n (%) | 0.616 | ||
| IA | 3 (20.00) | 5 (16.13) | |
| IB | 3 (20.00) | 3 (9.68) | |
| IIA | 1 (6.67) | 1 (3.23) | |
| IIB | 1 (6.67) | 7 (22.58) | |
| IIIA | 6 (40.00) | 14 (45.16) | |
| IIIB | 1 (6.67) | 1 (3.23) | |
| Interval to surgery, day, median [IQR] | 35.0 [27.0-40.5] | 34.0 [29.5-39.5] | 0.723 |
Continuous data are expressed as mean ± SD or median [IQR], and categorical data are shown as number (percentage). RATS, robot-assisted thoracoscopic surgery; VATS, video-assisted thoracoscopic surgery; SD, standard deviation; BMI, body mass index; FEV1, forced expiratory volume in 1 s; DLCO, diffusing capacity for carbon monoxide; IQR, interquartile range.