Table 4 Results of multiple logistic regression for frequent voice disorder (fVD): secondary 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 | |
School type | ||||
Middle | 1.27 | (0.63–2.59) | 1.41 | (0.61–3.42) |
General high | 0.99 | (0.50–2.01) | 1.03 | (0.43–2.60) |
Vocational high | 1 | 1 | ||
Age (yrs) | ||||
< 30 | 1 | 1 | ||
30–39 | 1.49 | (0.54–4.82) | 1.38 | (0.50–4.61) |
40–49 | 1.47 | (0.52–4.89) | 0.98 | (0.31–3.44) |
≥ 50 | 1.87 | (0.68–6.14) | 1.87 | (0.64–6.40) |
Sex | ||||
Male | 1 | – | ||
Female | 3.04 | (1.42–7.26)c | – | |
Smoking status | ||||
Never smoker | 1 | – | ||
Ex-smoker | 0.55 | (0.18–1.59) | – | |
Current smoker | 0.96 | (0.30–2.91) | – | |
Sleep hours (hrs/day) | ||||
< 6 | 1.42 | (0.71–2.82) | 1.15 | (0.52–2.51) |
6–7 | 1.18 | (0.66–2.17) | 0.96 | (0.49–1.91) |
≥ 7 | 1 | 1 | ||
Class hours (hrs/wk) | ||||
< 16 | 1 | 1 | ||
16–19 | 1.33 | (0.66–2.94) | 1.65 | (0.68–4.66) |
≥ 20 | 1.90 | (0.80–4.73) | 2.37 | (0.82–7.58) |
Working hours (hrswk) | ||||
40 | 1 | 1 | ||
41–52 | 0.96 | (0.49–1.98) | 0.98 | (0.46–2.19) |
> 52 | 1.03 | (0.38–2.73) | 0.94 | (0.28–3.01) |
Homeroom teacher | ||||
Yes | 1.52 | (0.90–2.62) | 1.85 | (0.98–3.60) |
No | 1 | 1 | ||
Subject | ||||
Physical education | 1.03 | (0.16–3.95) | – | |
Music | 0.60 | (0.09–2.39) | – | |
Others | 1 | – | ||
Sick leave as needed | ||||
Yes | 1 | 1 | ||
No | 2.40 | (1.41–4.16)c | 1.93 | (1.03–3.73)c |