Table 1 Call center operators’ work history
From: Otologic symptoms and hearing thresholds among a cohort of call center operators in Lagos
Variable | Frequency (n = 90) n (%) |
|---|---|
Duration of working with headphones (years) | |
1–3 | 68 (75.6) |
> 3–10 | 19 (21.1) |
> 10 | 3 (3.3) |
Type of headphones | |
Monaural | 9 (10.0) |
Right ear | 5 (5.6) |
Left ear | 4 (4.4) |
Binaural | 81 (90.0) |
Length of a work shift (h) | |
≤ 8 | 66 (73.3) |
9–12 | 24 (26.7) |
Mean ± SD | 8.42 ± 1.0 |
Number of days per week spent working with headphones | |
≤ 5 | 84 (93.3) |
> 5 | 6 (6.7) |
Mean ± SD | 5.07 ± 0.3 |