Table 1 Correlations between clinicopathological characteristics and the micropapillary pattern (N=383)
Characteristics | No. of cases | Micropapillary pattern | P-value | |
|---|---|---|---|---|
Negative (%) | Positive (%) | |||
Gender | ||||
Male | 214 | 105 (53) | 109 (59) | |
Female | 169 | 94 (47) | 75 (41) | 0.202 |
Age (years) | ||||
<60 | 127 | 60 (30) | 67 (36) | |
≥60 | 256 | 139 (70) | 117 (64) | 0.193 |
Smoking | ||||
Nonsmoker | 185 | 107 (54) | 80 (44) | |
Smoker | 198 | 92 (46) | 104 (56) | 0.044 |
Maximum tumor diameter (mm) | ||||
≤30 | 261 | 139 (70) | 122 (66) | |
>30 | 122 | 60 (30) | 62 (34) | 0.457 |
Lymph node metastasis | ||||
Negative | 267 | 164 (82) | 103 (56) | |
Positive | 126 | 35 (18) | 81 (44) | <0.001 |
Pleural invasion | ||||
Negative | 265 | 150 (75) | 115 (63) | |
Positive | 118 | 49 (25) | 69 (37) | 0.006 |
Lymphatic invasion | ||||
Negative | 215 | 154 (77) | 61 (33) | |
Positive | 168 | 45 (23) | 123 (67) | <0.001 |
Venous invasion | ||||
Negative | 309 | 182 (92) | 127 (69) | |
Positive | 74 | 17 (8) | 57 (31) | <0.001 |
Dominant histological subtype | ||||
Bronchioloalveolar | 103 | 84 (42) | 19 (11) | |
Non-bronchioloalveolar | 280 | 115 (58) | 165 (89) | <0.001 |
Acinar | 69 | 36 (18) | 33 (18) | |
Non-acinar | 314 | 163 (82) | 151 (82) | 0.968 |
Papillary | 182 | 65 (33) | 117 (63) | |
Non-papillary | 201 | 134 (67) | 67 (37) | <0.001 |
Solid with mucin | 29 | 14 (7) | 15 (8) | |
Non-solid with mucin | 354 | 185 (93) | 169 (92) | 0.680 |
