Table 1. Baseline data and imaging signs of 342 patients with solid pulmonary nodules.
| Baseline variables | Benign (N=171) | Malignant (N=171) | Total (N=342) | χ2/t | P |
|---|---|---|---|---|---|
| Sex | 0.187 | 0.665 | |||
| Male | 91 (53.2%) | 87 (50.9%) | 178 (52.0%) | ||
| Female | 80 (46.8%) | 84 (49.1%) | 164 (48.0%) | ||
| Age | 56.63±13.26 | 60.92±10.28 | 58.77±12.04 | 3.342 | 0.001* |
| Longest diameter (cm) | 1.61±0.60 | 1.71±0.54 | 1.66±0.57 | 1.705 | 0.089 |
| Shape | 3.092 | 0.079 | |||
| Irregular | 45 (26.3%) | 60 (35.1%) | 105 (30.7%) | ||
| Round or semiround | 126 (73.7%) | 111 (64.9%) | 237 (69.3%) | ||
| Vacuole sign | 13.049 | <0.001* | |||
| No | 159 (93.0%) | 136 (79.5%) | 295 (86.3%) | ||
| Yes | 12 (7.0%) | 35 (20.5%) | 47 (13.7%) | ||
| Bronchial inflation sign | 2.974 | 0.085 | |||
| No | 122 (71.3%) | 107 (62.6%) | 229 (67.0%) | ||
| Yes | 49 (28.7%) | 64 (37.4%) | 113 (33.0%) | ||
| Lobulation sign | 2.784 | 0.095 | |||
| No | 73 (42.7%) | 58 (33.9%) | 131 (38.3%) | ||
| Yes | 98 (57.3%) | 113 (66.1%) | 211 (61.7%) | ||
| Spicule sign | 11.987 | 0.001* | |||
| No | 99 (57.9%) | 67 (39.2%) | 166 (48.5%) | ||
| Yes | 72 (42.1%) | 104 (60.8%) | 176 (51.5%) | ||
| Clear boundary | 2.886 | 0.089 | |||
| No | 44 (25.7%) | 31 (18.1%) | 62 (18.1%) | ||
| Yes | 127 (74.3%) | 140 (81.9%) | 280 (81.9%) | ||
| Pleural indentation sign | 3.805 | 0.051 | |||
| No | 100 (58.5%) | 82 (47.4%) | 182 (53.2%) | ||
| Yes | 71 (41.5%) | 99 (52.6%) | 160 (46.8%) | ||
| Vessel convergence sign | 29.321 | <0.001* | |||
| No | 115 (67.3%) | 65 (38.0%) | 180 (52.6%) | ||
| Yes | 56 (32.7%) | 106 (62.0%) | 162 (47.4%) |
*, P<0.05.