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Table 7 Mean, SD, and t test of (PTA) hearing threshold levels across tested frequencies (250 Hz–4000 Hz) and Ds% in right and left ears in both study and control groups

From: Effects of aging on dichotic listening ability

 

Study

Control

P

Mean

SD

Mean

SD

250 R

27.7

10.6

21.3

2.5

.000

500R

26.3

13.8

16.6

2.6

.000

1000R

31.3

14.3

21.2

2.8

.000

2000R

36.0

13.4

26.1

3.2

.000

4000R

47.7

14.9

30.1

8.6

.000

8000R

54.1

16.0

36.0

9.1

.000

250L

27.7

12.9

17.9

4.5

.000

500L

28.7

14.6

20.1

.7

.000

1000L

31.2

13.5

21.2

2.6

.000

2000L

39.9

14.3

22.8

5.0

.000

4000L

50.0

15.4

31.9

7.7

.000

8000L

56.3

15.3

37.0

8.1

.000

Ds%R

86.3

13.8

95.7

5.2

.000

Ds% L

85.2

14.7

95.7

6.1

.000

  1. Table 7 shows that the study (elderly) group mean PTA was mild to moderate high-frequency hearing loss