Table 1.

Participants’ characteristics by age group

		Age	Years of education	MOCAa	Depression scaleb	Laterality quotientc	Right ear PTA (Hz)	Left ear PTA (Hz)
Group 1 (22–34 years) (n = 20, 13 females)	Minimum	22	13	26	0	90	−28,67	−27
	Maximum	34	24	30	8	100	−16	−12
	Mean ±SD	28.05 ± 4.17	17.70 ± 2.64	28.80 ± 1.20	2.50 ± 2.28	99.50 ± 2.24	−20.12 ± 3.76	−19.28 ± 3.47
Group 2 (37–54 years) (n = 17, 8 females)	Minimum	37	11	25	0	70	−39.33	−36
	Maximum	54	24	30	9	100	−15.33	−12
	Mean ± SD	45.94 ± 5.45	16.65 ± 4.17	27.64 ± 1.56	1.65 ± 2.50	97.06 ± 8.49	−22.02 ± 6.25	−19.39 ± 5.41
Group 3 (55–69 years) (n = 21, 17 females)	Minimum	55	12	26	0	90	−42.33	−35.67
	Maximum	69	29	30	8	100	−18.67	−13
	Mean ± SD	61.81 ± 5.17	18.14 ± 4.07	28.19 ± 1.63	1.48 ± 2.18	99.52 ± 2.18	−25.81 ± 6.17	−23.22 ± 6.18
Group 4 (70–93 years) (n = 18, 12 females)	Minimum	70	6	23	0	78.95	−48.67	−51.33
	Maximum	93	24	30	9	100	−20.33	−17.67
	Mean ± SD	76.89 ± 5.71	14.78 ± 5.19	26.67 ± 1.68	2.28 ± 2.59	97.07 ± 6.06	−32.46 ± 7.79	−32.07 ± 7.85

PTA pure tone average, MOCA Montreal Cognitive Assessment scale, SD standard deviation

^aMax score at the MOCA is 30

^bMax score for the depression scale is 30

^cMax score for the laterality quotient is 100