Table 1 Patients’ general characteristics by study group
Localization group | Control group | P | |
|---|---|---|---|
Number of patients (n) | 50 | 100 | |
Sex, n (%) | 0.265 | ||
Male | 13 (26) | 35 (35) | |
Female | 37 (74) | 65 (65) | |
Mean age, years, \(\overline{x}\) ± s | 54.66 ± 9.373 | 54.75 ± 10.032 | 0.734 |
History of lung disease, n (%) | 0.473 | ||
Positive | 6 (12) | 7 (7) | |
Negative | 44 (88) | 93 (93) | |
History of smoking, n (%) | 0.767 | ||
Positive | 10 (20) | 18 (18) | |
Negative | 40 (80) | 82 (82) | |
Nodule type, n (%) | 58 | 110 | 0.286 |
Single occurrence | 42 (84) | 90 (90) | |
Multiple occurrences | 8 (16) | 10 (10) | |
Nodule diameter, mm, \(\overline{x}\) ± s | 7.046 ± 2.248 | 7.795 ± 2.055 | 0.053 |
Nodule properties, n (%) | 0.796 | ||
Solid nodules | 9 (15.5) | 13 (11.8) | |
Pure ground glass nodules | 41 (70.7) | 81 (73.6) | |
Mixed ground glass nodules | 8 (13.8) | 16 (14.6) | |
Nodule location, n (%) | 0.623 | ||
Right upper lobe | 22 (37.9) | 32 (29.1) | |
Right middle lobe | 7 (12.1) | 12 (10.9) | |
Right lower lobe | 12 (20.7) | 21 (19.1) | |
Left upper lobe | 11 (19.0) | 26 (23.6) | |
Left lower lobe | 6 (10.3) | 19 (17.3) | |
Type of final surgical approach after pathological diagnosis, n (%) | 0.056 | ||
Pulmonary wedge resection | 38 (76) | 56 (56) | |
Segmentectomy | 6 (12) | 24 (24) | |
Lobectomy | 6 (12) | 20 (20) | |
Postoperative pathology, n (%) | 0.282 | ||
Adenocarcinoma in situ | 27 (46.6) | 49 (44.5) | |
Invasive adenocarcinoma | 10 (17.2) | 30 (27.3) | |
Minimally invasive adenocarcinoma | 3 (5.2) | 5 (4.5) | |
Atypical adenomatous hyperplasia | 6 (10.3) | 9 (8.2) | |
Benign lesions | 12 (20.7) | 17 (15.5) |