Variable Variable Low-budding High-budding P value
Age Age 59.13±7.19 60.2±8.11 0.525
Sex Male 49(96.1%) 32(91.4%) 0.365
Female 2(3.9%) 3(8.6%)
Histologic grade Well-differentiated 32(62.7%) 21(60%) 0.664
Moderately-differentiated 17(33.3%) 11(31.4%)
Poorly-differentiated 2(3.9%) 3(8.6%)
UICC/TNM stage II 9(17.6%) 2(5.7%) 0.011
III 14(27.5%) 3(8.6%)
IV 28(54.9%) 30(85.7%)
Nodal involvement Present 22(43.1%) 20(57.1%) 0.202
Absent 29(56.9%) 15(42.9%)
Extralaryngeal extension Present 26(51%) 28(80%) 0.006
Absent 25(49%) 7(20%)
Perineural invasion Present 17(33.3%) 10(28.6%) 0.640
Absent 34(66.7%) 25(71.4%)
Vascular invasion Present 11(21.6%) 8(22.9%) 0.887
Absent 40(78.4%) 27(77.1%)
Survival Disease-free patients 17(33.3%) 1(2.9%) 0.001
Recurrence and/or death 34(66.7%) 34(97.1%)