Click Here!

Home |

3: Changes in otoacoustic emissions with personal stereo use, industrial noise exposure and with age

 

Figure 3 The bottom four curves compare the effects of different kinds of exposure versus age for males only. Females with negligible personal stereo use and no industrial exposure are shown for reference. Data points represent mean values and error bars indicate plus or minus 1 standard error.

 

Sample sizes for males in the four mutually exclusive groups of personal stereo (PS) use and industrial noise exposure

Age group (years)
Noise exposure
10-19
20-29
30-39
40-49
50-59
Total
Negligible PS, no industrial (PS 0, IND 0)
47
138
150
126
79
540
PS only (PS 1&2, IND 0)
61
88
40
30
21
240
Industrial only (PS 0, IND 1)
13
44
25
21
10
113
PS and industrial (PS 1&2, IND 1)
4
93
28
30
18
173
Total
125
363
243
207
128
1066
Corresponding sample sizes for females in the PS 0, IND 0 group were: 10-19y, 45; 20-29y, 158; 30-39y, 136; 40-49y, 107; 50-59y, 55. Total, 501.

©MJA 1998

Contents |

Home | Issues | eMJA shop | My account | Classifieds | More... | Contact | Topics | Search

The Medical Journal of Australia    eMJA  


Readers may print a single copy for personal use. No further reproduction or distribution of the articles should proceed without the permission of the publisher. For permission, contact the Australasian Medical Publishing Company.
Journalists are welcome to write news stories based on what they read here, but should acknowledge their source as "an article published on the Internet by The Medical Journal of Australia <http://www.mja.com.au>".
<URL: http://www.mja.com.au/> © 1998 Medical Journal of Australia.
We appreciate your comments.