Table 3 Comparison of the pre-shift hearing thresholds of study subjects with the hearing thresholds of the control subjects
From: Otologic symptoms and hearing thresholds among a cohort of call center operators in Lagos
Hearing threshold (dB) | |||
|---|---|---|---|
Frequency (kHz) | Study group Mean ± SD | Control group Mean ± SD | Significance (2-tailed) |
2-tailed | Right ear | ||
0.5 | 35.0 ± 11.0 | 34.9 ± 13.5 | |
1 | 22.4 ± 8.4 | 22.9 ± 7.3 | |
2 | 18.3 ± 9.1 | 19.3 ± 6.3 | |
3 | 17.3 ± 8.6 | 18.4 ± 7.0 | |
4 | 17.3 ± 9.4 | 18.1 ± 7.1 | |
6 | 17.9 ± 10.2 | 22.5 ± 9.8 | |
8 | 13.7 ± 8.4 | 16.2 ± 11.4 | |
PTA average | 25.4 ± 8.2 | 25.9 ± 7.8 | 0.679 |
Left ear | |||
0.5 | 33.6 ± 10.8 | 32.4 ± 13.3 | |
1 | 21.9 ± 8.6 | 23.2 ± 8.3 | |
2 | 18.2 ± 9.0 | 18.4 ± 7.6 | |
3 | 16.9 ± 8.2 | 18.6 ± 7.4 | |
4 | 16.3 ± 8.8 | 18.4 ± 7.6 | |
6 | 18.9 ± 8.4 | 22.2 ± 9.9 | |
8 | 13.9 ± 9.0 | 15.7 ± 11.4 | |
PTA average | 24.8 ± 8.5 | 24.7 ± 7.8 | 0.967 |