Skip to main content
. 2019 Feb;11(2):564–572. doi: 10.21037/jtd.2019.01.31

Table 1. Patients characteristics.

Characteristics N non-missing Overall (N=969) 1st comparison 2nd comparison
Lobectomy (N=846) Sub-lobar resection (N=123) P value* SND (N=455) LS-ND (N=98) NS (N=416) P value*
Age 969 0.002 0.009
   ≤70 years 597 [62] 537 [63] 60 [49] 297 [65] 48 [49] 252 [61]
   >70 years 372 [38] 309 [37] 63 [51] 158 [35] 50 [51] 164 [39]
Gender 969 0.753 0.426
   Female 311 [32] 270 [32] 41 [33] 154 [34] 27 [28] 130 [31]
   Male 658 [68] 576 [68] 82 [67] 301 [66] 71 [72] 286 [69]
Smokers 969 0.547 0.043
   No 370 [38] 320 [38] 50 [41] 180 [40] 26 [27] 164 [39]
   Yes 599 [62] 526 [62] 73 [59] 275 [60] 72 [73] 252 [61]
pTNM stage 969 0.251 <0.001
   Ia 641 [66] 554 [65] 87 [71] 271 [60] 71 [72] 299 [72]
   Ib 328 [34] 292 [35] 36 [29] 184 [40] 27 [28] 117 [28]
Vascular invasion 815 0.08 <0.001
   No 643 [79] 567 [80] 76 [72] 342 [78] 59 [65] 242 [85]
   Yes 172 [21] 143 [20] 29 [28] 98 [22] 32 [35] 42 [15]
Histologic predominant pattern 959 0.196 0.127
   Lepidic 124 [13] 102 [12] 22 [18] 54 [12] 17 [17] 53 [13]
   Common variants 762 [79] 671 [80] 91 [74] 365 [81] 79 [81] 318 [78]
   NOS—other variants 73 [8] 63 [8] 10 [8] 34 [8] 2 [2] 37 [9]
Histologic grade 955 0.131 0.542
   G1 202 [21] 170 [20] 32 [27] 90 [20] 17 [18] 95 [23]
   G2 484 [51] 422 [51] 62 [52] 238 [53] 51 [53] 195 [48]
   G3 269 [28] 243 [29] 26 [22] 124 [27] 29 [30] 116 [29]

*, χ2 test or Fisher’s exact test. NS, lymph node sampling; LS-ND, lobe-specific lymph node dissection; SND, systematic nodal dissection.