Table 1.
Univariate Analysis of Differences in Nodule Type, Demographic Differences and CT Features Between the Invasive Mucinous Adenocarcinoma and Invasive Non-Mucinous Lung Adenocarcinoma Groups
| IMA (N=53) | INMA (N=141) | Statistic | P | ||
|---|---|---|---|---|---|
| Sex | 1.47 | 0.225 | |||
| M | 25 (47.17) | 53 (37.59) | |||
| F | 28 (52.83) | 88 (62.41) | |||
| Age (years) | 70.89±14.50 | 58.52±9.57 | 5.76 | 0* | |
| Nodule type | 0a | ||||
| I | 44 (83.02) | 92 (65.25) | |||
| II | 9(16.98) | 49 (34.75) | |||
| Size (cm) | 1.80±0.73 | 1.44±0.59 | 0.002** | ||
| Morphology | Clearly irregular | 8 (15.09) | 14 (9.92) | 1.022 | 0.312 |
| Spherical or spheroid | 45 (84.91) | 127 (90.08) | |||
| Tumor lung interface | Indistinct | 13 (24.53) | 3 (2.13) | 22.669 | 0 |
| Distinct | 40 (75.47) | 138 (97.87) | |||
| Lobulation | Yes | 32 (60.38) | 61 (43.26) | 4.521 | 0.033 |
| No | 21 (39.62) | 80 (56.74) | |||
| Spiculation | Yes | 31 (58.49) | 54 (38.3) | 6.38 | 0.012 |
| No | 22 (41.51) | 87 (61.7) | |||
| Air bronchogram or vacuolar sign | Yes | 34 (64.15) | 34 (24.11) | 27.124 | 0 |
| No | 19 (35.85) | 107 (75.89) | |||
| Abnormal vascular changes | Yes | 41 (77.36) | 129 (91.49) | 7.095 | 0.008 |
| No | 12 (22.64) | 12 (8.51) | |||
| Pleural retraction | Yes | 33 (62.26) | 79 (56.03) | 0.614 | 0.433 |
| No | 20 (33.74) | 62 (43.97) | |||
Notes: *Normal distribution (unpaired t-test) with statistical significance (P<0.05); **non-normal distribution (Mann–Whitney U-test) with statistical significance (P<0.05); afisher exact test. Bold values referred to significant variables (p < 0.05) in univariate analysis.