In a multivariate logistic regression , failed quitting was predicted by higher habit/automatism score ( odds ratio = 1.44 , 95 % CI = 1.06-1 .95 , P = 0.02 ) and greater number of cigarettes smoked per day ( odds ratio = 1.03 , 95 % CI = 1.01-1 .06 , p = 0.03 ) .
