Table 3 Comparison between the two studied groups according to distribution (laterality and nodal level)

 Unilateral

77 (81.9%)

54 (85.7%)

1.876

^MCp = 0.380

 Midline

1 (1.1%)

2 (3.2%)

 Bilateral

16 (17%)

7 (11.1%)

 IA

27 (28.7%)

30 (47.6%)

5.824*

0.016*

 IB

21 (22.3%)

4 (6.3%)

7.205*

0.007*

 IIA

67 (71.3%)

25 (39.7%)

15.519*

< 0.001*

 IIB

41 (43.6%)

22 (34.9%)

1.187

0.276

 III

25 (26.6%)

32 (50.8%)

9.551*

0.002*

 IVA

3 (3.2%)

12 (19%)

10.974*

0.001*

 IVB

3 (3.2%)

27 (42.9%)

38.395*

< 0.001*

 V

3 (3.2%)

9 (14.3%)

6.577*

^FEp = 0.014^*

 VI

5 (5.3%)

7 (11.1%)

1.793

^FEp = 0.225

 Parotid

5 (5.3%)

0 (0%)

3.461

^FEp = 0.083

 Para pharyngeal

1 (1.1%)

3 (4.8%)

2.078

^FEp = 0.303

 Pre auricular

1 (1.1%)

0 (0%)

0.675

^FEp = 1.000

 Retropharyngeal

7 (7.4%)

5 (7.9%)

0.013

^FEp = 1.000

 Peri vertebral

1 (1.1%)

1(1.6%)

0.082

^FEp = 1.000

 Supra clavicualr

11 (11.7%)

15 (23.8%)

4.002*

0.045*

 Dissection bed

1 (1.1%)

1(1.6%)

0.082

^FEp = 1.000

 Mediastinal

0 (0%)

2 (3.2%)

3.023

^FEp = 0.159

 Delphian

0 (0%)

8 (12.7%)

12.577*

^FEp = 0.001*

 EJV

9 (9.6%)

0 (0%)

6.399*

^FEp = 0.011*