Respondent answer “Yes” for having symptoms

Respondent answer “Yes” for having symptoms AND “Yes” it is related to work AND “Yes” it become better when off-work

Nonexposed

Group %

Exposed

Group %

X² (1)

p

Nonexposed

Group %

Exposed

Group %

X²

(1)

p

Strained eyes

57.0

66.7

1.10

0.294

38.0

47.4

1.090

0.297

Eyes irritation

19.0

41.7

8.17

0.004^a

24.6

50.0

9.175

0.002^a

Headache

34.5

55.6

5.360

0.021^a

14.1

34.2

8.110

0.004^a

Drowsiness

32.4

52.8

5.147

0.023^a

16.2

36.8

7.824

0.005^a

Sore or dry throat

35.2

41.7

0.516

0.472

13.4

34.2

8.899

0.003^a

Runny nose

24.6

33.3

1.115

0.291

6.3

18.4

0.047^b

Chest tightness

7.7

22.2

0.029^b

1.4

21.1

<0.001^b

Cough

27.5

25.0

0.089

0.766

7.7

10.5

0.525

Sneezing

21.1

8.3

3.112

0.078

9.9

5.3

0.529

Shortness of breath

9.9

8.3

1.00

3.5

7.9

0.368