Table 2.
Working conditions and frequent voice disorder (fVD) of teachers
| Variables | Primary school | Secondary school | ||||
|---|---|---|---|---|---|---|
| N(%) | fVD | N(%) | fVD | |||
| N (%) | P-value* | N (%) | P-value* | |||
| Total | 558 (100) | 71 (12.7) | – | 743 (100) | 80 (10.8) | – |
| Number of students (N/class) | ||||||
| < 22 | 115 (20.6) | 11 (9.6) | 0.651 | 57 (7.7) | 8 (14.0) | 0.249 |
| 22–24 | 225 (40.3) | 32 (14.2) | 42 (5.7) | 5 (11.9) | ||
| 25–27 | 207 (43.4) | 27 (13.0) | 270 (36.3) | 21 (7.8) | ||
| ≥ 28 | 11 (2.0) | 1 (9.1) | 374 (50.3) | 46 (12.3) | ||
| Class hours (hrs/wk) | ||||||
| < 16 | 32 (5.7) | 2 (6.3) | 0.566 | 153 (20.6) | 10 (6.5) | 0.060 |
| 16–19 | 33 (5.9) | 5 (15.2) | 457 (61.5) | 49 (10.7) | ||
| 20–23 | 415 (74.4) | 56 (13.5) | 129 (17.4) | 21 (16.3) | ||
| ≥ 24 | 78 (14.0) | 8 (10.3) | 4 (0.5) | 0 (0) | ||
| Working hours (hrs/wk) | ||||||
| 40 | 213 (38.2) | 20 (9.4) | 0.034† | 125 (16.8) | 13 (10.4) | 0.988 |
| 41–52 | 323 (57.9) | 45 (13.9) | 518 (69.7) | 56 (10.8) | ||
| > 52 | 22 (3.9) | 6 (27.3) | 100 (13.5) | 11 (11.0) | ||
| Homeroom teacher | ||||||
| Yes | 460 (82.4) | 57 (12.4) | 0.609 | 404 (54.4) | 53 (13.1) | 0.024† |
| No | 98 (17.6) | 14 (14.3) | 339 (45.6) | 27 (8.0) | ||
| Subject | ||||||
| Physical education | 18 (3.3) | 1 (5.6) | 0.003† | 29 (3.9) | 2 (6.9) | 0.789 |
| Music | 11 (2.0) | 5 (45.5) | 19 (2.6) | 2 (10.5) | ||
| Others | 521 (94.7) | 65 (12.3) | 690 (93.5) | 76 (11.0) | ||
| Sick leave as needed | ||||||
| Yes | 295 (52.9) | 27 (9.2) | 0.007† | 417 (56.1) | 26 (6.2) | <.001† |
| No | 263 (47.1) | 44 (16.7) | 326 (43.9) | 54 (16.6) | ||
| Employment status | ||||||
| Regular | 540 (96.8) | 67 (12.4) | 0.219 | 638 (85.9) | 70 (11.0) | 0.657 |
| Part-time | 18 (3.2) | 4 (22.2) | 105 (14.1) | 10 (9.5) | ||
*by Chi-square test, †Statistically significant (P - value < 0.05)