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Table 3 Stepwise Logistic Regression Model for GP Use

From: Air pollution and general practitioner access and utilization: a population based study in Sarnia, 'Chemical Valley,' Ontario

 

A priori

SES

Health & Behaviour

Community Context

Pollution Health Effects (CI)

Sex (Female)

1.514*

1.532*

1.530*

1.426

1.295

(0.893-1.878)

Age (18-24)

      

   25-44

2.953*

3.790*

3.560*

3.313*

3.690*

(1.201-11.342)

   45-64

2.398

3.246*

2.932

2.675

3.162*

(1.204-9.763)

   65+

2.339

3.100*

3.147*

3.047

4.306*

(1.330-13.938)

Chronic Conditions

1.193***

1.194***

1.210***

1.207***

1.131*

(1.020-1.256)

GHQ 4+

1.225

1.194

1.199

1.177

1.046

(0.696-1.574)

GP Access

2.705*

3.235*

3.388*

2.978*

3.091*

(1.141-8.374)

Housing Tenure

 

1.857***

1.819**

1.844**

1.866**

(1.279-2.723)

Smoking

  

1.598*

1.608*

1.581*

(1.051-2.378)

Medical Check-up

  

1.611*

1.546*

1.622*

(1.060-2.484)

Community Satisfaction

   

1.514*

1.625*

(1.088-2.428)

Odour Annoyance

   

1.068*

1.052

(0.995-1.113)

Stress Symptoms

    

6.236**

(2.128-18.273)

Diagnostics

     

Model Likelihood Ratio

χ2 = 37.48, df = 7, p < 0.001

χ2 = 48.67, df = 8, p < 0.001

χ2 = 58.61, df = 10, p < 0.001

χ2 = 66.69, df = 12 p < 0.001

χ2 = 78.13, df = 13, p < 0.001

McFadden R 2

0.05

0.06

0.07

0.11

0.11

Hosmer-Lemeshow Test

χ2= 12.05, df = 8, p = 0.15

χ2= 4.35, df = 8, p = 0.82

χ2= 6.80, df = 8, p = 0.56

χ2= 16.00, df = 8, p = 0.04

χ2= 12.55, df = 8, p = 0.128

  1. Significance level: * < 0.05, ** < 0.01 *** < 0.001.