Table 1.

Multiple regression modeling of quit attempts and abstinence before and after the availability of NRT products OTC controlling for biased recall of quits

Model covariatesModel 1
Model 2
Model 3
Model 3
Quit attempts with patch
Abstinence with patch
Quit attempts with gum
Abstinence with gum
βPβPβPβP
Number of months between quit and interview−0.052*0.004−0.015*0.0820.2210.0400.0880.143
Before/after OTC NRT0.2630.0280.1590.0080.557<0.0010.2170.001
R20.477R20.402R20.438R20.269
  • * Linear term.

  • Logarithmic term.