Table 2 Correlation between clinicopathological characteristics and the micropapillary pattern in stageIA patients (N=197)
Characteristics | No. of cases | Micropapillary pattern | P-value | |
|---|---|---|---|---|
Negative (%) | Positive (%) | |||
Gender | ||||
Male | 108 | 60 (51) | 48 (62) | |
Female | 89 | 59 (49) | 30 (38) | 0.125 |
Age (years) | ||||
<60 | 68 | 36 (30) | 32 (41) | |
≥60 | 129 | 83 (70) | 46 (59) | 0.120 |
Smoking | ||||
Nonsmoker | 107 | 72 (60) | 35 (45) | |
Smoker | 90 | 47 (40) | 43 (55) | 0.031 |
Lymphatic invasion | ||||
Negative | 157 | 111 (93) | 46 (59) | |
Positive | 40 | 8 (7) | 32 (41) | <0.001 |
Venous invasion | ||||
Negative | 180 | 116 (98) | 64 (82) | |
Positive | 17 | 3 (2) | 14 (18) | <0.001 |
Dominant histological subtype | ||||
Bronchioloalveolar | 79 | 64 (54) | 15 (19) | |
Non-bronchioloalveolar | 118 | 55 (46) | 63 (81) | <0.001 |
Acinar | 28 | 17 (14) | 11 (14) | |
Non-acinar | 169 | 102 (86) | 67 (86) | 0.971 |
Papillary | 80 | 34 (27) | 46 (59) | |
Non-papillary | 117 | 85 (73) | 32 (41) | <0.001 |
Solid with mucin | 10 | 4 (3) | 6 (8) | |
Non-solid with mucin | 187 | 115 (97) | 72 (92) | 0.176 |
