Table 6 Predictors of respiratory symptoms and Bronchial Asthma among flour mills workers, Assiut

Age (Ref = 40 years and older)

1.465 (0.831 -2.583)

0.186

1.629 (0.845 -3.143)

0.145

Sex (Ref = Female)

3.682 (0.785 -17.261)

0.098

0.802 (0.136 -4.714)

0.807

Education

(Ref = university education)

-------

 Illiterate, read and write

5.574 (1.903 -16.324)

0.002*

3.294 (0.997 -10.885)

0.051

 Primary and preparatory

4.909 (1.586 -15.199)

0.006*

2.231 (0.631 -7.880)

0.213

 Secondary and technical

3.510 (1.199 -10.278)

0.022*

2.087 (0.655 -6.652)

0.214

Residence (Ref = urban)

1.950 (1.105 -3.440)

0.021*

1.505 (0.806 -2.812)

0.200

Smoking (Ref = nonsmokers)

3.967 (2.042 -7.707)

0.0001*

3.536 (1.675 -7.464)

0.001*

Duration of work

(Ref = less than 10 years)

1.137 (0.638 -2.029)

0.663

-------

Exposure level

(Ref = low exposure)

1.821 (1.821 -3.218)

0.039*

1.167 (0.589 -2.310)

0.658

Bronchial Asthma predictors

 Age (Ref = 40 years and older)

8.700 (3.252 -23.273)

0.0001*

9.145 (3.220 -25.969)

0.0001*

 Sex (Ref = Female)

3.007 (0.377 -23.972)

0.299

0.683 (0.061 -7.645)

0.757

Education

(Ref = university education)

 Illiterate, read and write

2.045 (0.527 -7.928)

0.301

1.114 (0.229 -5.427)

0.893

 Primary and preparatory

4.333 (1.116 -16.830)

0.034*

1.247 (0.250 -6.232)

0.788

 Secondary and technical

2.843 (0.759 -10.651)

0.121

1.149 (0.254 -5.198)

0.857

Residence (Ref = urban)

1.686 (0.846 -3.361)

0.138

-------

Smoking (Ref = nonsmokers)

3.299 (1.381 -7.880)

0.007*

4.101 (1.491 -11.280)

0.006*

Duration of work

(Ref = less than 10 years)

3.083 (1.532 -6.202)

0.002*

-------

Exposure level

(Ref = low exposure)

2.374 (1.151 -4.894)

0.019*

1.488 (0.620 -3.573)

0.374