DATA USERCOHORT1_1;
    SET USERCOHORT1;
    FORMAT CONDITION_START_DATE DRUG_EXPOSURE_START_DATE LAST_VISIT_END_DATE YYMMDD10.;
    LAG1_DRUG_EXPOSURE_START_DATE=LAG(DRUG_EXPOSURE_START_DATE);
    IF RN=1 THEN LAG1_DRUG_EXPOSURE_START_DATE=.;
    FORMAT LAG1_DRUG_EXPOSURE_START_DATE YYMMDD10.;
    IF RN>1 THEN PRESCRIBE_DATE_DIFF=DRUG_EXPOSURE_START_DATE-LAG1_DRUG_EXPOSURE_START_DATE;
    ELSE PRESCRIBE_DATE_DIFF=0;
RUN;
DATA USERCOHORT1_2;
    SET USERCOHORT1_1;
    IF RN=1 THEN COMPLETE_TRT_CYCLE=1;
    RETAIN COMPLETE_TRT_CYCLE;   ---主要是该功能如何实现
    IF PRESCRIBE_DATE_DIFF>60 THEN COMPLETE_TRT_CYCLE+1;
RUN;