Table 2

Zero inflated negative binomial regression: incidence rate ratio (job strain and the use of health services)

General practitioner visits

Specialist visits

model(1)

model (2)

model (3)

model(1)

model (2)

model (3)

Whole population

High job strain

1.26***

(1.19-1.31)

1.23***

(1.18-1.29)

1.10***

(1.05-1.14)

1.27***

(1.14-1.42)

1.23***

(1.11-1.37)

1.14***

(1.04-1.25)

Medium job strain

1.07***

(1.02-1.12)

1.06***

(1.02-1.11)

1.01

(0.97-1.05)

1.15***

(1.04-1.28)

1.14***

(1.03-1.26)

1.11**

(1.01-1.22)

N

29110

29105

Males

High job strain

1.27***

(1.18-1.38)

1.26***

(1.17-1.36)

1.11***

(1.04-1.19)

1.28***

(1.07-1.54)

1.26***

(1.06-1.50)

1.16*

(1.00-1.34)

Medium job strain

1.03

(0.96-1.10)

1.02

(0.95-1.09)

0.96

(0.90-1.02)

1.04

(0.88-1.23)

1.04

(0.88-1.22)

1.00

(0.86-1.17)

N

14328

14324

Females

High job strain

1.24***

(1.17-1.31)

1.23***

(1.16-1.31)

1.10***

(1.05-1.16)

1.27***

(1.13-1.44)

1.23***

(1.08-1.39)

1.13**

(1.01-1.26)

Medium job strain

1.11***

(1.04-1.18)

1.10***

(1.04-1.17)

1.06**

(1.00-1.12)

1.24***

(1.10-1.39)

1.22***

(1.09-1.37)

1.19***

(1.06-1.33)

N

14782

14781

This table reports estimated coefficients (β_i) of the zero-inflated negative binomial regression transformed to incidence-rate ratios , *** p < 0.01, ** p < 0.05, * p < 0.1, confidence interval at 95% are in parentheses. Model 1 is the baseline specification, while model 2 includes an additional confounding variable, workplace social support. In model 3, covariates representing: individual's health status, number of chronic conditions, having a family doctor, province and occupational fixed effects are included

Azagba and Sharaf BMC Public Health 2011 11:642   doi:10.1186/1471-2458-11-642