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Table 4 Logistic Regression Models of GP Use with NO2, SO2, BTEX and Odour Annoyance

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

 

No Pollution

NO2

SO2

BTEX

Odour Annoyance

  

1.155*

1.611*

1.407

1.060*

Age (18-24)

     

   25-44

3.765*

3.625*

2.821*

2.969*

3.707*

   45-64

3.234*

3.195*

2.459*

2.622

3.115*

   65+

4.242*

4.206*

3.218*

3.485*

4.390*

Chronic Conditions

1.139*

1.128*

1.134*

1.134*

1.133*

GP access

4.318**

4.516**

3.371*

3.432*

3.150*

Housing Tenure

1.932*

1.703**

1.778**

1.858***

1.879***

Smoking

1.613*

1.564*

1.471

1.529*

1.581*

Medical Check-up

1.679*

1.661*

1.603*

1.640*

1.633*

Community Satisfaction

1.536*

1.535*

1.604*

1.599*

1.639*

Stress Symptoms

8.523***

8.826***

9.126***

8.946***

7.402***

Diagnostics

     

Model Likelihood Ratio

χ2 = 74.81, df = 10, p < 0.001

χ2 = 80.42, df = 11, p < 0.001

χ2 = 76.11, df = 11, p < 0.001

χ2 = 73.63, df = 11 p < 0.001

χ2 = 78.21, df = 11 p < 0.001

McFadden R 2

0.09

0.10

0.10

0.09

0.10

Hosmer-Lemeshow Test

χ2= 11.79, df = 8, p = 0.16

χ2= 12.58, df = 8, p = 0.12

χ2= 9.76, df = 8, p = 0.28

χ2= 9.88, df = 8, p = 0.27

χ2= 14.85, df = 8, p = 0.06

Correctly Classified (%)

76.7

77.5

77.5

77.0

76.8

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