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Table 2 Comparison between the 3 groups as regards follow-up tympanogram data using chi-square test

From: Effect of head and neck radiotherapy on the Eustachian tube functions

Variable

Glottic group (20)

Sub-glottic group (3)

Supra-glottic group (7)

Chi-square test

p value

Tympanogram before treatment in both ears

Normal

20 (100%)

3 (100%)

7 (100%)

 

Tympanogram (end of ttt) (contralateral)

A—Normal

15 (75%)

3 (100%)

4 (57.1%)

= 0.3761

B—Effusion

2 (10%)

0 (0%)

0 (0%)

C—ET dysfunction

3 (15%)

0 (0%)

3 (42.9%)

Tympanogram (end of ttt) (ipsilateral)

A—Normal

10 (50%)

1 (33.3%)

3 (42.9%)

= 0.037*

B—Effusion

2 (10%)

0 (0%)

4 (57.1%)

C—ET dysfunction

8 (40%)

2 (66.7%)

0 (0%)

Tympanogram (12 weeks) (contralateral)

A—Normal

16 (80%)

3 (100%)

6 (85.7%)

= 0.8160

B—Effusion

2 (10%)

0 (0%)

0 (0%)

C—ET dysfunction

2 (10%)

0 (0%)

1 (14.3%)

Tympanogram (12 weeks) (ipsilateral)

A—Normal

15 (75%)

2 (66.7%)

5 (71.4%)

= 0.0744

B—Effusion

0 (0%)

0 (0%)

2 (28.6%)

C—ET dysfunction

5 (25%)

1 (33.3%)

0 (0%)

  1. *Percentage of Column Total