Table 3

Mean and standard deviation of hearing level in dB for each frequency at baseline and mean and standard deviation of change in hearing level (average of R & L ear).

Frequency (Hz)

Baseline – All subjects (dB)

Baseline – Subjects with follow up (dB)

Change at 16 wks* (dB)

Change at 32 wks* (dB)


Number of subjects

33

23

22

19

250

13.3 +/- 8.0

14.8 +/- 8.3

-1.6 +/- 5.1

-2.1 +/- 5.1

500

11.3 +/- 8.6

12.7 +/- 9.8

-0.6 +/- 5.1

-2.1 +/- 5.1

1000

11.2 +/- 9.8

11.4 +/- 11.3

-0.6 +/- 3.2

0.0 +/- 3.0

2000

9.6 +/- 12.0

11.3 +/- 13.1

-0.5 +/- 3.9

0.0 +/- 2.8

3000

13.6 +/- 13.7

16.1 +/- 14.8

-0.3 +/- 4.5

0.0 +/- 2.8

4000

17.4 +/- 14.9

19.1 +/- 15.8

-0.9 +/- 4.5

-1.1 +/- 5.7

6000

20.5 +/- 13.7

22.6 +/- 14.7

0.6 +/- 5.6

-0.2 +/- 6.9

8000

23.4 +/- 14.5

25.0 +/- 15.0

-2.2 +/- 5.6

-0.4 +/- 7.2

12000

36.3 +/- 19.7

37.9 +/- 19.1

-0.6 +/- 8.4

0.0 +/- 11.4

Low Freq PTA

11.5 +/- 9.8

12.1 +/- 10.8

-0.6 +/- 2.5

-0.9 +/- 2.0

High Freq PTA

20.4 +/- 13.4

22.2 +/- 14.2

-0.8 +/- 4.8

-0.6 +/- 5.2


*A negative value indicates improved hearing and a positive value indicates worse hearing

Schouten et al. BMC Infectious Diseases 2006 6:28   doi:10.1186/1471-2334-6-28

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