Research Article
Development and Validation of a Prediction Pneumothorax Model in CT-Guided Transthoracic Needle Biopsy for Solitary Pulmonary Nodule
Table 1
Clinical characteristics of the derivation cohort and the external validation cohort.
| | Variables | Pneumothorax in the derivation cohort | P value | Pneumothorax in the validation cohort | P value | | No (n=256) | Yes (n=55) | No (n=176) | Yes (n=51) |
| | Sex, n (%) | | | 0.393 | | | 0.881 | | Female | 85 (33.20) | 15 (27.27) | | 78 (44.32) | 22 (43.14) | | | Male | 171 (66.80) | 40 (72.73) | | 98 (55.68) | 29 (56.86) | | | Age, (years) | 59 (51-67) | 67 (60-72) | <0.001 | 61 (51-68) | 63 (58-73) | 0.016 | | Diagnosis of nodule, n (%) | | | 0.552 | | | 0.314 | | Benign | 69 (26.95) | 17 (30.91) | | 86 (48.86) | 29 (56.86) | | | Malignant | 187 (73.05) | 38 (69.09) | | 90 (51.14) | 22 (43.14) | | | Nodule location, n (%) | | | 0.495 | | | 0.776 | | Non-periphery | 72 (28.12) | 18 (32.73) | | 27 (15.34) | 7 (13.73) | | | Periphery | 184 (71.88) | 37 (67.27) | | 149 (84.66) | 44 (86.27) | | | Puncture position, (%) | | | 0.022 | | | <0.001 | | Supine | 109 (42.58) | 20 (36.36) | | 71 (40.34) | 5 (9.80) | | | Prone | 130 (50.78) | 25 (45.45) | | 74 (42.05) | 37 (72.55) | | | Lateral | 17 ( 6.64) | 10 (18.18) | | 31 (17.61) | 9 (17.65) | | | Nodule size, (mm) | 20.25 (17.50-24.50) | 20.50 (18.00-24.25) | 0.970 | 20.00 (15.00-25.00) | 19.00 (15.00-25.00) | 0.607 | | Puncture distance, (mm) | 26.5 (19.0-40.0) | 32.0 (24.5-48.5) | 0.002 | 15.0 (5.0-21.0) | 12.0 (5.0-20.0) | 0.374 | | Puncture times | 1 (1-1) | 1 (1-2) | <0.001 | 1 (1-2) | 2 (1-2) | 0.002 |
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