Chart 3.

Data from the relationship between the likelihood of occurrence and non-occurrence of post-radiotherapy hearing loss, taking into account the variables: age, total dose of radiation and volume of radiotherapy treatment volume with ASHA criteria.

			Age		Total	p-value
			≤ 64 years	> 64 years
	Hearing loss	Yes	8	7	15	0,667
	ASHA	No	2	2	4
Total			10	9	19
			RT total dose		Total	p-value
			≤ 64 Gy	> 64 Gy
	Hearing loss	Yes	1	2	3	0,41
	ASHA	No	8	16	24
Total			9	18	27
			RT Treatment volume		Total	p-value
			≤ 1800 cm	> 1800 cm
	Hearing loss	Yes	1	3	4	0,333
	ASHA	No	8	7	15
Total			9	10	19