Table 3.

The adjusted associations between exposure to silica dust and the pulmonary function.

Parameters	Crude β	CI (95%)	p-value	Adjusted β	CI (95%)	p-value∗
FVC	−4.72	−9.1 to -0.3	0.037	−4.10	−8.3 to −0.02	0.049
FEV1	−10.40	−15.3 to -5.5	<0.001	−8.64	−13.4 to −3.7	0.001
FEV1/FVC	−6.27	−10.1 to -2.4	0.002	−5.22	−9.1 to −1.2	0.009
PEF	−9.14	−14.5 to -3.8	0.001	−8.41	−13.7 to −13.1	0.002

^∗Multiple linear regression analysis adjusted for age, BMI, job tenure, smoking, and duration of cigarette and Ghalyan smoking. CI: confidence interval; FVC: forced vital capacity; FEV1: forced expiratory volume in the first second; PEF: peak expiratory flow.