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Table 1

Logistic regression summary for predicting unfiltered tap water use at home (n = 3,256)

PredictorBetaStandard errorsOdd ratios95% Confidence intervalWald statisticp
Female −0.32 0.09 0.73 [0.61, 0.86] 13.80 <0.001 
Age −0.01 0.01 0.99 [0.98, 1.01] 0.37 0.544 
Origin from West Virginia −0.45 0.09 0.64 [0.54, 0.76] 26.45 <0.001 
Student type (control Freshmen)     24.26 <0.001 
 Sophomore 0.25 0.16 1.23 [0.93, 1.75] 2.32 0.127 
 Junior 0.41 0.16 1.50 [1.10, 2.04] 6.65 0.010 
 Senior 0.61 0.15 1.85 [1.38, 2.49] 16.54 <0.001 
 Graduate or professional 0.67 0.15 1.96 [1.46, 2.64] 19.73 <0.001 
Organoleptic perceptions 0.52 0.06 1.69 [1.50, 1.90] 75.53 <0.001 
Perceived health risks −0.38 0.07 0.68 [0.60, 0.78] 32.72 <0.001 
Environmental concern 0.25 0.05 1.29 [1.16, 1.42] 24.17 <0.001 
Trust in EPA −0.01 0.01 0.99 [0.98, 1.01] 0.43 0.512 
Trust in US government (squared) 0.00 0.00 1.00 [0.99, 1.00] 0.41 0.521 
Pseudo R2 (Nagelkerke) 0.274 
PredictorBetaStandard errorsOdd ratios95% Confidence intervalWald statisticp
Female −0.32 0.09 0.73 [0.61, 0.86] 13.80 <0.001 
Age −0.01 0.01 0.99 [0.98, 1.01] 0.37 0.544 
Origin from West Virginia −0.45 0.09 0.64 [0.54, 0.76] 26.45 <0.001 
Student type (control Freshmen)     24.26 <0.001 
 Sophomore 0.25 0.16 1.23 [0.93, 1.75] 2.32 0.127 
 Junior 0.41 0.16 1.50 [1.10, 2.04] 6.65 0.010 
 Senior 0.61 0.15 1.85 [1.38, 2.49] 16.54 <0.001 
 Graduate or professional 0.67 0.15 1.96 [1.46, 2.64] 19.73 <0.001 
Organoleptic perceptions 0.52 0.06 1.69 [1.50, 1.90] 75.53 <0.001 
Perceived health risks −0.38 0.07 0.68 [0.60, 0.78] 32.72 <0.001 
Environmental concern 0.25 0.05 1.29 [1.16, 1.42] 24.17 <0.001 
Trust in EPA −0.01 0.01 0.99 [0.98, 1.01] 0.43 0.512 
Trust in US government (squared) 0.00 0.00 1.00 [0.99, 1.00] 0.41 0.521 
Pseudo R2 (Nagelkerke) 0.274 
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