Table 1.
General characteristics of the subjects (n = 166)
| Total | Symptom high risk group | Symptom low risk group | |||||
|---|---|---|---|---|---|---|---|
| Group | Number (%) | Mean (SD) | Number (%) | Mean (SD) | Number (%) | Mean (SD) | |
| Age (year) | 46.2(7.7) | 47.6(8.4) | 45.9(7.5) | ||||
| BMI (kg/m 2 ) | 24.1(2.4) | 24.8(2.4) | 23.9(2.4) | ||||
| Tenure (month) | 202.8(116.0) | 233(122.5) | 194(113.4) | ||||
| Working hours (hour) | 9.4(5.5) | 10.2(2.7) | 9.2(2.4) | ||||
| Break time (minute) | 42.0(32.4) | 36.3(39.7) | 43.5(30.2) | ||||
| Marital status | Yes | 154(92.8) | 31(91.2) | 123(93.2) | |||
| No | 10(6.0) | 3(8.8) | 7(5.3) | ||||
| Exercise | Yes* | 69(41.6) | 6(17.6) | 63(48.1) | |||
| No | 96(57.8) | 28(82.4) | 68(51.9) | ||||
| House work (hour) | ≥1 hour | 29(17.5) | 30(88.2) | 104(78.8) | |||
| < 1 hour | 134(80.7) | 3(8.8) | 26(19.7) | ||||
| Physical burden † | N to M‡ | 75(45.2) | 10(29.4) | 65(49.2) | |||
| Hard | 70(42.2) | 13(38.2) | 57(43.2) | ||||
| Very hard | 21(12.7) | 11(32.4) | 10(7.6) | ||||
| Ergonomics § | High risk | 75(45.2) | 24(70.6) | 51(43.2) | |||
| Low risk | 77(46.4) | 10(29.4) | 67(56.8) | ||||
| Symptoms ∥ | High risk | 34(20.5) | |||||
| Low risk | 132(79.5) | ||||||
* Exercise Yes: >3 times/week, >40 minutes/one time.
†Physical burden: level of physical fatigue when working.
‡None to moderate.
§Ergonomics: check list from OSHA Draft Ergonomics Standard, a score of 10 or above is high risk group.
∥Symptoms: experience of any pain or discomfort during past 1 year. Any pain continued longer than 1 week or occurred more than 1 time during 1 month are classified into high risk groups.