Table 1.
Baseline demographics of the patients involved in this research
| Characteristics | Training cohort (n = 100) |
Validation cohort (n = 48) |
p value |
|---|---|---|---|
| Age, years | 0.055 | ||
| Median [range] | 58 [20, 76] | 61 [42, 83] | |
| Sex, no. (%) | 0.220 | ||
| Male | 79/100 (79%) | 33/48 (68.75%) | |
| Female | 21/100 (21%) | 15/48 (31.25%) | |
| Smoking, no. (%) | 0.707 | ||
| Yes | 70/100 (70%) | 32/48 (66.7%) | |
| No | 30/100 (30%) | 16/48 (33.3%) | |
| Side, no. (%) | 0.389 | ||
| Upper left lobe | 34/100 (34%) | 12/48 (25%) | |
| Lower left lobe | 14/100 (14%) | 8/48 (16.7%) | |
| Upper right lobe | 22/100 (22%) | 12/48 (25%) | |
| Middle right lobe | 4/100 (4%) | 2/48 (4.2%) | |
| Lower right lobe | 26/100 (26%) | 14/48 (29.1%) | |
| Location, no. (%) | 0.216 | ||
| Peripheral | 63/100 (63%) | 25/48 (52.1%) | |
| Central | 37/100 (37%) | 23/48 (47.9%) | |
| LD, mma | 0.230 | ||
| Median [range] | 54 [10, 115] | 43.5 [15, 100] | |
| LPD, mma | 0.838 | ||
| Median [range] | 36.5 [8, 77] | 35 [11, 90] | |
| CEA, (ng/ml)a | 0.380 | ||
| Median [range] | 4.7 [0.486, 1135] | 7.11 [1.19, 646.4] | |
| Histological subtype, no. (%) | 0.164 | ||
| Squamous cell carcinoma | 50/100 (50%) | 18/48 (37.5%) | |
| Adenocarcinoma | 50/100 (50%) | 30/48 (62.5%) |
aLD, LPD and CEA indicate the longest diameter, the longest perpendicular diameter, and carcinoembryonic antigen, respectively