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SASPhile
Quartz | Level 8

 

SubjectIDTest_NameDateCollection_TimeResult_ValueResult_Units
123456Height6/8/2010NA1.53m
123456Height6/22/2010NA1.51m
123456HeightNANA1.51m
123456Weight6/8/2010NA63kg
123456Weight6/22/2010NA62kg
123456WeightNANA61kg
123456WeightNANA61kg
456789Height8/12/2010NA1.36m
456789HeightNANA1.36m
456789Height7/30/2010NA1.36m
456789Weight8/12/2010NA36kg
456789WeightNANA36kg
456789Weight7/30/2010NA36kg

 

Now if height is missing in all visits, then BMI is blank
if height is missing in one of the visits, take height from previous visits(from the last visit ordered by visit date)
if weight is missing in one of the visits, leave BMI blank

 

 

5 REPLIES 5
PaigeMiller
Diamond | Level 26

BMI is not present in this data set. Please explain further what you want to do and provide lots of details so we can understand your problem.

--
Paige Miller
SASPhile
Quartz | Level 8

need to derive BMI. using below formula

BMI = Weight/(Height * Height)

lakshmi_74
Quartz | Level 8
data want(drop=new_bmi_height);
set have;
by subjectid date; retain bmi new_bmi_height;
if first.subjectid then do; bmi=0; new_bmi_height=0; end;
if missing(result_value) then
do;
if upper(test_name) eq 'HEIGHT' then bmi=new_bmi_height;
else if upper(test_name) eq 'WEIGHT' then bmi=0;
end;
else
do;
if upper(test_name) eq 'HEIGHT' then
do; bmi=/*Calculate BMI Value */; new_bmi_height=bmi; end;
else if upper(test_name) eq 'WEIGHT' then bmi=result_value;
end;
output;
run;
SASPhile
Quartz | Level 8

result_value is not BMI. it is actually weight and height values

lakshmi_74
Quartz | Level 8
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