Table 3 Results of multiple logistic regression for frequent voice disorder (fVD): primary school teachers
From: Effect of teacher’s working conditions on voice disorder in Korea: a nationwide survey
General and work-related factors | Total | Female | ||
|---|---|---|---|---|
aORa | 95% CI | aORb | 95% CI | |
Age (yrs) | ||||
< 30 | 1 | 1 | ||
30–39 | 0.98 | (0.46–2.12) | 0.84 | (0.39–1.88) |
40–49 | 0.56 | (0.26–1.26) | 0.53 | (0.24–1.20) |
≥ 50 | 0.79 | (0.33–1.90) | 0.66 | (0.27–1.63) |
Sex | ||||
Male | 1 | – | ||
Female | 2.78 | (1.01–9.66)c | – | |
Smoking status | ||||
Nerver smoker | 1 | – | ||
Ex-smoker | 1.14 | (0.16–5.05) | – | |
Current smoker | 1.31 | (0.17–6.99) | – | |
Sleep hours (hrs/day) | ||||
< 6 | 2.24 | (1.03–4.77)c | 2.34 | (1.03–5.14)c |
6–7 | 1.69 | (0.93–3.05) | 1.69 | (0.91–3.13) |
≥ 7 | 1 | 1 | ||
Class hours (hrs/wk) | ||||
< 20 | 1 | 1 | ||
20–23 | 1.40 | (0.53–4.17) | 1.61 | (0.57–5.25) |
≥ 24 | 1.26 | (0.35–4.56) | 1.40 | (0.36–5.67) |
Working hours (hrs/wk) | ||||
40 | 1 | 1 | ||
41–52 | 1.25 | (0.69–2.33) | 1.21 | (0.65–2.34) |
> 52 | 2.72 | (0.83–8.10) | 2.42 | (0.67–7.87) |
Homeroom teacher | ||||
Yes | 0.94 | (0.40–2.45) | 0.80 | (0.33–2.12) |
No | 1 | 1 | ||
Subject | ||||
Physical education | 0.72 | (0.04–4.95) | 1.27 | (0.06–10.31) |
Music | 6.76 | (1.52–30.75)c | 4.66 | (0.93–22.94) |
Others | 1 | 1 | ||
Sick leave as needed | ||||
Yes | 1 | 1 | ||
No | 1.71 | (1.00–2.98)c | 1.76 | (1.00–3.16)c |