Cost-Effectiveness of Oral Antidiabetic Drugs: A Prospective Multicenter Study of Real-World Patients

Table 11

Algorithm of double selection for variable selection.

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(1) Select predictors of the outcome variable using adaptive lasso

(2) For each treatment arm {

Select predictors for treatment variable using adaptive lasso

}

(3) Take the covariates as the union of all predictors selected in steps 1 and 2

(4) Apply multivariate regression to the covariates selected

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