Table 1. Univariate analysis of preperative patient’s characteristics.
| Single-port | 3-port | p | ||||
|---|---|---|---|---|---|---|
| Total | n = 65 | n = 82 | ||||
| SD | SD | |||||
| Age (yr) | 62 | 19 | 65 | 17 | 0.89 | |
| Sex | Male | 32 (49) | 41 (50) | |||
| Female | 33 (51) | 41 (50) | 0.93 | |||
| BMI (kg/m2) | 22.6 | 3.3 | 23.0 | 3.5 | 0.55 | |
| ASA | 1 | 7 (11) | 3 (4) | |||
| 2 | 49 (75) | 63 (77) | ||||
| 3 | 9 (14) | 16 (19) | 0.18 | |||
| Smoking | Never smoker | 24 (37) | 32 (39) | |||
| Ex-smoker | 35 (54) | 46 (56) | ||||
| Current smoker | 6 (9) | 4 (5) | 0.58 | |||
| COPD | 12 (18) | 27 (33) | 0.06 | |||
| Diabetes mellitus | 11 (17) | 11 (13) | 0.55 | |||
| Tumor size (mm) | 15 | 9 | 16 | 10 | 0.24 | |
| CT findings of tumor | Pure ground glass | 8 (12) | 6 (7) | |||
| Part solid | 11 (17) | 6 (7) | ||||
| Solid | 46 (71) | 70 (86) | 0.09 | |||
| Location of the tumor | Right | 34 (52) | 49 (60) | |||
| Left | 31 (48) | 33 (40) | 0.37 |
Values represent n (%), mean. ASA: American Society of Anesthesiologists physical status; BMI: body mass index; CT: computed tomography; COPD: chronic obstructive pulmonary disease