單項(xiàng)選擇題欲研究高血壓(HBP,1=患病、0=未患?。┡c年齡(age)、性別(gender)、體質(zhì)指數(shù)(BMI)、日攝入鈉量(NA)的關(guān)系。欲研究日攝入鈉量、體質(zhì)指數(shù)與高血壓的關(guān)系,同時(shí)判斷日攝入鈉量和體質(zhì)指數(shù)是否存在交互效應(yīng),下列哪個(gè)程序是正確的?()

A.proc logistic data=file-name;model HBP(event="1")=na bmi na*bmi;run;
B.proc logistic data=file-name;model HBP(event="1")=na bmii;run;proc logistic data=file-name;model HBP(event="1")=na bmi na*bmi;run;
C.proc freq data=file-name;table na*bmi;run;proc logistic data=file-name;model HBP(event="1")=na bmi na*bmi;run;
D.proc corr;var na;with bmi;run;proc logistic data=file-name;model HBP(event="1")=na bmi na*bmi;run;


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2.單項(xiàng)選擇題欲研究高血壓(HBP,1=患病、0=未患病)與年齡(age)、性別(gender)、體質(zhì)指數(shù)(BMI)、日攝入鈉量(NA)的關(guān)系。將年齡分組處理,以及根據(jù)我國(guó)體質(zhì)指數(shù)標(biāo)準(zhǔn)劃分體型后,用logistic回歸對(duì)高血壓與所有自變量建模,下面代碼哪個(gè)是正確的?()

A.proc logistic data=file-name;model HBP(event="1")=age gender bmi na;run;
B.proc logistic data=file-name;class age bmi;model HBP=age gender bmi na;run;
C.proc logistic data=file-name;class age bmi;model HBP(event="0")=age gender bmi na;run;
D.proc logistic data=file-name descending;class age bmi;model HBP=age gender bmi na;run;

4.單項(xiàng)選擇題下列哪個(gè)選項(xiàng)在回歸分析中不可用于強(qiáng)影響點(diǎn)的判斷?()

A.RSTUDENT
B.COOK’S D
C.DFFITS
D.SLECTION=STEPWISE

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