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

From: Imaging of metastatic cervical nodes: is CT helpful in differentiation of squamous cell carcinoma (SCC) from non-SCC groups?

  SCC χ2 p
SCC (n = 94) Non-SCC (n = 63)
Laterality
 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%)
Involved nodal groups and levels
 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*
  1. χ2 chi-square test, MC Monte Carlo, FE Fisher’s exact, p p value for comparing between the two studied groups
  2. *Statistically significant at p ≤ 0.05