Table 2. Risk Factors Affecting Pneumothorax After CT-Guided Percutaneous Core Needle Lung Biopsy: Results of Univariate Analysesa.
| Variables | Pneumothorax | P Value | |
|---|---|---|---|
| Present | Absent | ||
| Total | 100 (16.9) | 491 (83.1) | |
| Patient’s age, years | 64.31 ± 0.58 | 63.98 ± 1.14 | 0.814b |
| Patient gender | 0.039c | ||
| Male | 76/397 (19.1) | 321/397 (80.9) | |
| Female | 24/194 (12.4) | 170/194 (87.6) | |
| Lesion size, cm | 3.38 ± 0.19 | 3.78 ± 0.86 | 0.056b |
| Lesion depth, cm | 2.70 ± 0.19 | 1.25 ± 0.07 | < 0.001b |
| Lesion location | 0.368c | ||
| RUL | 34/202 (16.8) | 168/202 (83.2) | |
| RML | 9/45 (20.0) | 36/45 (80.0) | |
| RLL | 23/103 (22.3) | 80/103 (77.7) | |
| LUL | 25/152 (16.4) | 127/152 (83.6) | |
| LLL | 9/89 (10.1) | 80/89 (89.9) | |
| Crossing of a fissure by the needle | 0.002c | ||
| Present | 12/33 (36.4) | 21/33 (63.6) | |
| Absent | 88/558 (15.8) | 470/558 (84.2) | |
| Emphysema | 0.009c | ||
| Present | 33/136 (24.3) | 103/136 (75.7) | |
| Absent | 67/455 (14.7) | 388/455 (85.3) | |
| Final diagnosis | 0.691c | ||
| Malignancy | 60/365 (16.4) | 305/365 (83.6) | |
| Benign | 40/226 (17.7) | 186/226 (82.3) | |
Abbreviations: LLL, left lower lobe; LUL: left upper lobe; RLL, right lower lobe; RML, right middle lobe; RUL, right upper lobe.
aValues are expressed as No. (%) or mean ± SD.
bDetermined with the Student’s t-test.
cDetermined with the two-tailed Pearson’s χ2 test.