Table 2 High risk rate of upper extremities musculoskeletal symptoms by characteristics of subjects (n = 166)

Total

166(100)

13(7.8)

24(14.5)

10(6.0)

11(6.6)

34(20.5)

Age (year)

30-39

35(21.1)

5(14.3)

3(8.6)

2(5.7)

2(5.7)

5(14.3)

40-49

66(39.8)

1(1.5)

9(13.6)

3(4.5)

4(6.1)

12(18.2)

≥50

65(39.2)

7(10.8)

12(18.5)

5(7.7)

5(7.7)

17(26.2)

BMI (kg/m ² )

<25

90(63.8)

4(4.4)

6(6.7)*

2(2.2)*

3(3.3)*

7(10.0)^†

≥25

51(36.2)

6(11.8)

14(27.5)

7(13.7)

7(13.7)

18(37.3)

Tenure (month)

12-117

46(27.7)

4(8.7)

5(10.9)

2(4.3)

4(8.7)

8(17.4)

118-212

37(22.3)

1(2.7)

3(8.1)

1(2.7)

2(5.4)

4(10.8)

213-324

44(26.5)

4(9.1)

6(13.6)

3(6.8)

3(6.8)

10(22.7)

≥325

39(23.5)

4(10.3)

10(25.6)

4(10.3)

2(5.1)

12(30.8)

Working

<9

77(50.0)

4(4.4)

8(10.4)

3(3.9)

2(2.6)*

10(13.0)*

Hours (hour)

≥9

77(50.0)

6(11.8)

14(18.2)

7(9.1)

9(11.7)

22(28.6)

Break time

<30

80(54.2)

7(8.8)

13(14.4)

3(3.3)

4(4.4)

19(21.1)

(minute)

≥30

52(31.3)

6(9.5)

7(13.5)

4(7.7)

6(11.5)

10(19.2)

Exercise ^‡

Yes

69(41.6)

4(5.8)

5(7.2)*

2(2.9)

3(4.3)

6(8.7)^†

No

96(57.8)

9(9.4)

19(19.8)

8(8.3)

8(8.3)

28(29.2)

House work

<1 hr/day

134(80.7)

8(6.4)

20(14.9)

8(6.0)

9(6.7)

30(22.4)

≥1 hr/day

29(17.5)

4(10.5)

3(10.3)

1(3.4)

1(3.4)

3(10.3)

Physical

N to M^§

75(45.2)

1(1.3)*

7(9.3)†

5(6.7)

2(2.7)*

10(13.3)^†

burden

Hard

70(42.2)

7(10.0)

8(11.4)

3(4.3)

5(7.1)

13(18.6)

Very hard

21(12.7)

5(23.8)

9(42.9)

2(9.5)

4(19.0)

11(52.4)

Ergonomics ^∥

Low risk

78(51.3)

3(3.8)*

7(9.0)^†

4(5.1)

2(2.6)*

11(14.1)^†

High risk

74(48.7)

10(13.5)

17(23.0)

6(8.1)

9(12.2)

23(31.1)