Osteopontin, asbestos exposure and pleural plaques: a cross-sectional study

BMC Public Health

Table 3 Linear regression coefficient (b), standard error of the coefficient (SE(b)) and p-value of the z test statistics at univariable and in two models of multivariable regression

Predictor variables ^§	Univariable analysis			Multivariable analysis
				Model 1 ^@			Model 2 ^#
	b	SE(b)	p-value	b	SE(b)	p-value	b	SE(b)	p-value
Age (years)	0.94	0.21	0.000				0.19	0.33	0.570
Time since last exposure (years)	0.83	0.22	0.000	1.13	0.23	0.000	0.98	0.35	0.005
Time since first exposure (years)	0.99	0.20	0.000
Length of exposure (years)	0.37	0.21	0.090	0.77	0.22	0.000	0.68	0.27	0.014
Cumulative exposure (ff/ml) × years	0.03	0.01	0.009
Peak exposure (ff/ml)	0.03	0.02	0.150
Smoking classes	- 0.77	2.36	0.746

^§ The dependent variable is Osteopontin in all models of linear regression analysis
^@ Estimated with forward stepwise selection of predictors
^# Estimated forcing age in the model 1.

ISSN: 1471-2458