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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 0.400.97 0.65 0.41–1.03
 ≥ 15 0.38 0.220.67 0.38 0.210.70
% 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 0.280.74 0.46 0.280.75
 ≥ 20 0.10 0.050.19 0.10 0.050.21
% poverty
 < 5   
 ≥ 5 to < 15 1.52 0.91–2.52 1.39 0.82–2.33
 ≥ 15 7.21 4.0412.86 6.26 3.4611.34
% 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 2.438.82 4.52 2.378.65
 ≥ 20 5.69 2.8211.50 5.38 2.6610.91
% 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