TABLE 3

Tobit Regression Model Predicting the Percentage Change in the Geometric Mean of Cotinine

VariableHousing TypePercentage Change (95% Confidence Interval)P
Federal poverty-level ratio−28.3 (−34.6 to −21.5)<.001
WhiteDetached house0.0
Attached house−5.5 (−45.4 to 63.6).838
Apartment212.2 (50.3–548.7).003
BlackDetached house0.0
Attached house40.0 (−0.03 to 96.8).052
Apartment45.6 (5.4–101.1).024
HispanicDetached house0.0
Attached house4.7 (−38.1 to 76.9).863
Apartment7.8 (−23.0 to 50.9).656
OtherDetached house0.0
Attached house12.7 (−75.9 to 427.1).877
Apartment−18.5 (−71.1 to 130.2).694
  • Other variables included gender and age; includes the housing-by-race interaction.