Table 1.
Comparison of clinicopathological factors between LTG and OTG in unmatched patients and propensity score-matched patients
| Characteristics | All patients | P-value | Propensity score-matched patients | P-value | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
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| LTG (n=122) | OTG (n=96) | LTG (n=65) | OTG (n=65) | ||||||||
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| n | % | n | % | n | % | n | % | ||||
| Age* | years (mean) | 67 | 66 | 0.313 | 68 | 67 | 0.176 | ||||
| Sex* | Male | 97 | 79.5 | 72 | 75.0 | 0.429 | 50 | 73.5 | 51 | 75.0 | 0.833 |
| Female | 25 | 20.5 | 24 | 25.0 | 15 | 26.5 | 14 | 25.0 | |||
| BMI* | kg/m2 (mean) | 23 | 22 | 0.186 | 22 | 22 | 0.401 | ||||
| Tumor location* | U, UM | 84 | 68.9 | 60 | 62.5 | 0.325 | 39 | 57.4 | 39 | 57.4 | 1.000 |
| MU | 38 | 31.1 | 36 | 37.5 | 26 | 42.6 | 26 | 42.6 | |||
| Tumor size* | mm (mean) | 42 | 47 | 0.236 | 44 | 41 | 0.241 | ||||
| Histology* | Diff. | 69 | 56.6 | 55 | 57.3 | 0.913 | 34 | 50.0 | 39 | 57.4 | 0.377 |
| Undiff. | 53 | 43.4 | 41 | 42.7 | 31 | 50.0 | 26 | 42.6 | |||
| Retrieved LNs | number (mean) | 37 | 36 | 0.393 | 38 | 34 | 0.127 | ||||
| Operation time | min (mean) | 410 | 317 | <0.001 | 405 | 323 | <0.001 | ||||
| Blood loss | ml (mean) | 98 | 306 | <0.001 | 150 | 526 | <0.001 | ||||
| pT-stage* | T1 | 92 | 75.4 | 48 | 50.0 | 0.002 | 44 | 67.7 | 44 | 67.7 | 0.747 |
| T2 | 16 | 13.1 | 19 | 19.8 | 9 | 13.8 | 14 | 21.5 | |||
| T3 | 11 | 9.0 | 19 | 19.8 | 9 | 13.8 | 6 | 9.2 | |||
| T4 | 3 | 2.5 | 10 | 10.4 | 3 | 4.6 | 1 | 1.5 | |||
| pN-stage* | N0 | 103 | 84.4 | 69 | 71.9 | 0.256 | 51 | 78.5 | 54 | 83.1 | 0.943 |
| N1 | 9 | 7.4 | 15 | 15.6 | 6 | 9.2 | 4 | 6.2 | |||
| N2 | 7 | 5.7 | 7 | 7.3 | 6 | 9.2 | 5 | 7.7 | |||
| N3 | 3 | 2.5 | 5 | 5.2 | 2 | 3.1 | 2 | 3.1 | |||
*
Factors used for propensity score matching.