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Table 3 Adjusted odds ratios and 95% confidence intervals of macro-level demographic and environmental factors and increased odds of legionellosis occurrence

From: Analysis of population-level determinants of legionellosis: spatial and geovisual methods for enhancing classification of high-risk areas

 

Model Aa

Model Bb

OR

95% CI

OR

95% CI

% ≥ 65 years of age

 < 10

–

 

–

 

 ≥ 10 to < 15

0.62

0.40–0.97

0.65

0.41–1.03

 ≥ 15

0.38

0.22–0.67

0.38

0.21–0.70

% non-white race

 < 10

–

 

–

 

 ≥ 10 to < 50

0.85

0.49–1.48

0.82

0.45–1.51

 ≥ 50

1.68

0.92–3.07

1.27

0.61–2.65

% hispanic ethnicity

 < 5

–

 

–

 

 ≥ 5 to < 20

0.46

0.28–0.74

0.46

0.28–0.75

 ≥ 20

0.10

0.05–0.19

0.10

0.05–0.21

% poverty

 < 5

–

 

–

 

 ≥ 5 to < 15

1.52

0.91–2.52

1.39

0.82–2.33

 ≥ 15

7.21

4.04–12.86

6.26

3.46–11.34

% less or some high school

 < 5

–

 

–

 

 ≥ 5 to < 10

  

1.37

0.78–2.39

 ≥ 10

  

1.25

0.67–2.32

% homes built pre-1950

 < 5

–

 

–

 

 ≥ 5 to < 20

4.63

2.43–8.82

4.52

2.37–8.65

 ≥ 20

5.69

2.82–11.50

5.38

2.66–10.91

% renter occupied

 < 10

–

 

–

 

 ≥ 10 to < 55

  

0.99

0.51–1.95

 ≥ 55

  

1.28

0.54–3.02

% vacant housing

 < 5

–

 

–

 

 ≥ 5 to < 10

  

1.19

0.70–2.03

 ≥ 10

  

1.49

0.81–2.74

Primary water sourcec

 Groundwater

–

 

–

 

 Surface water

  

0.70

0.41–1.22

  1. Missing values were excluded from analysis
  2. Values in italics are statistically significantly at a significance level of 5%
  3. Ecological study design at the census tract level
  4. aMultivariate stepwise logistic regression model
  5. bFull multivariate logistic regression model
  6. cPopulation-weighted centroids of census tracts were joined with public water system polygons