Table 1. Descriptive characteristics of variable.
| Feature | Benign (n=115) | AAH/AIS/MIA (n=474) | Lepidic (n=146) | Acinar/papillary (n=345) | Micropapillary/solid (n=73) | IMA (n=24) |
|---|---|---|---|---|---|---|
| Age (y) | ||||||
| <60 | 82 (71%) | 337 (71%) | 64 (44%) | 181 (53%) | 36 (49%) | 16 (67%) |
| ≥60 | 33 (29%) | 137 (29%) | 82 (56%) | 164 (47%) | 37 (51%) | 8 (33%) |
| Gender | ||||||
| Male | 56 (49%) | 119 (25%) | 52 (36%) | 130 (38%) | 34 (47%) | 9 (38%) |
| Female | 59 (51%) | 355 (75%) | 94 (64%) | 215 (62%) | 39 (53%) | 15 (62%) |
| Size in lung window (mm) | 12.6±5.28 | 10.3±3.75 | 19.78±8.3 | 18.8±7.37 | 24.4±7.28 | 15.55±5.54 |
| Solid proportion (CTR %) | 1.98±3.49 | 0.48±1.5 | 4.0±5.7 | 7.09±7.29 | 15.83±8.2 | 6.65±4.99 |
| CT value (HU) | −476.9±187.48 | −528.55±142.05 | −422.6±138.71 | −289.96±157.72 | −135.04±119.54 | −272.46±143.56 |
| Ground-glass component | −554.56±168.7 | −569.71±107.62 | −550±146.64 | −466.23±124.7 | −421.18±117.76 | −491.37±127.5 |
| Solid component | −138.85±152.65 | −219.15±123.36 | −142.98±114.73 | −84.71±109.83 | −1.14±47.39 | −74.08±103.23 |
| Location | ||||||
| RUL | 45 (39%) | 177 (37%) | 56 (38%) | 118 (34%) | 29 (40%) | 6 (25%) |
| RML | 9 (8%) | 29 (6%) | 11 (7.5%) | 31 (9%) | 3 (4%) | 1 (4%) |
| RLL | 20 (17.5%) | 66 (14%) | 27 (18.5%) | 53 (15%) | 13 (18%) | 9 (38%) |
| LUL | 22 (19%) | 138 (29%) | 41 (28%) | 100 (29%) | 22 (30%) | 2 (8%) |
| LLL | 19 (16.5%) | 64 (14%) | 11 (7.5%) | 43 (12%) | 6 (8%) | 6 (25%) |
| GGN | ||||||
| pGGN | 40 (35%) | 318 (67%) | 16 (11%) | 21 (6%) | 0 (0%) | 0 (0%) |
| mGGN | 75 (65%) | 156 (33%) | 130 (89%) | 324 (94%) | 73 (100%) | 24 (100%) |
| Pathology stage | ||||||
| Benign/AAH | / | / | / | / | / | / |
| 0 | / | 157 (33%) | / | / | / | / |
| IA1 | / | 304 (64%) | 25 (17%) | 85 (25%) | 4 (5%) | 11 (46%) |
| IA2 | / | 1 (0.2%) | 96 (66%) | 189 (55%) | 25 (34%) | 11 (46%) |
| IA3 | / | / | 18 (12%) | 57 (16%) | 16 (22%) | 0 (0%) |
| IB | / | / | 7 (5%) | 14 (4%) | 28 (38%) | 2 (8%) |
AAH, atypical adenomatous hyperplasia; AIS, adenocarcinoma in situ; MIA, minimally invasive adenocarcinoma; IMA, invasive mucinous adenocarcinoma; CTR, ratio of the diameter of the solid component relative to the maximal tumor diameter; RUL, right upper lobe; RML, right middle lobe; RLL, right lower lobe; LUL, left upper lobe; LLL, left lower lobe; GGN, ground-glass nodule.