Table 1.
Univariate analysis
| Variable | No. of patients(n = 149)(%) | No. of contralateral nodal recurrence(n = 13)(%) | p value |
|---|---|---|---|
| Sex | 0.549 | ||
| Male | 102(68.5) | 8(61.5) | |
| Female | 47(31.5) | 5(38.5) | |
| Age(median = 51 years) | 0.294 | ||
| Less than median | 71(47.6) | 8(61.5) | |
| More than median | 78(52.4) | 5(38.5) | |
| Staging | |||
| Pathological T stage | < 0.001 | ||
| T1,T2 | 95(63.8) | 2(15.4) | |
| T3,T4 | 49(32.9) | 9(69.2) | |
| Complete NACT tumor response | 5(3.3) | 2(15.4) | |
| Pathological N stage | < 0.001 | ||
| N0 | 83(55.7) | 2(15.4) | |
| N1 | 16(10.7) | 0(0) | |
| N2 | 29(19.5) | 3(23.1) | |
| N3 | 21(14.1) | 8(61.5) | |
| Composite stage | 0.011 | ||
| Early stage (1/II) | 63(42.3) | 1(7.7) | |
| Advanced stage(III/IV) | 82(55.0) | 10(76.9) | |
| Complete NACT tumor response | 5(3.3) | 2(15.4) | |
| Pathology | |||
| Tumor grade | 0.093 | ||
| Not ascertained | 5(3.3) | 2(15.4) | |
| Well | 20(13.4) | 1(7.7) | |
| Moderate/poor | 124(83.2) | 10(76.9) | |
| Perineural invasion | 0.071 | ||
| Present | 79(53) | 10(76.9) | |
| Absent | 70(47) | 3(23.1) | |
| Lymphovascular emboli | 0.221 | ||
| Present | 52(34.9) | 7(53.8) | |
| Absent | 97(65.1) | 6(46.2) | |
| Tumor depth | 0.012 | ||
| 0.1–0.5 cm | 53(35.6) | 1(7.7) | |
| 0.6–1.0 cm | 48(32.2) | 3(23.1) | |
| More than 1 cm | 48(32.2) | 9(69.2) | |
| Primary resection margin in frozen | 0.179 | ||
| Clear(> 0.5 cm) | 72(48.3) | 5(38.5) | |
| Close(0.2 to 0.5 cm) | 70(46.9) | 6(46.2) | |
| Involved(< 0.1 cm) | 7(4.7) | 2(15.4) | |
| I/L Node ratio | 0.002 | ||
| < 0.09 | 114(76.5) | 5(38..5) | |
| > 0.09 | 35(23.5) | 8(61.5) | |
| Extracapsular spread in I/L node | < 0.001 | ||
| Present | 25(16.8) | 9(69.2) | |
| Absent | 124(83.2) | 4(30.8) | |
| Clinical/surgical | |||
| I/L clinical neck node | 0.081 | ||
| Involved | 57(38.3) | 8(61.5) | |
| Not involved | 92(61.7) | 5(38.5) | |
| C/L clinical neck node | < 0.001 | ||
| Involved | 8(5.4) | 7(53.8) | |
| Not involved | 141(94.6) | 6(46.2) | |
| Floor of mouth | 0.001 | ||
| Involved | 39(26.2) | 9(69.2) | |
| Not involved | 110(73.8) | 4(30.8) | |
| Lesion crossing midline | < 0.001 | ||
| Present | 33(24.1) | 9(69.2) | |
| Absent | 116(75.9) | 4(30.8) | |
| Base of tongue involvement | 0.054 | ||
| Involved | 18(12.1) | 4(30.8) | |
| Not involved | 131(87.9) | 9(69.2) | |
| Reconstructions | 0.001 | ||
| Primary closure | 85(57) | 3(23) | |
| Pedicled flap | 14(9.4) | 5(38.5) | |
| Local/Free flap | 50(33.6) | 5(38.5) | |
| Therapy | |||
| NACT | 0.103 | ||
| Given | 22(14.8) | 4(30.8) | |
| Not given | 127(85.2) | 9(69.2) | |
| Radiotherapy | 0.185 | ||
| Given | 110(73.8) | 12(92.3) | |
| Not given | 39(26.2) | 1(7.7) | |