*******************************************************************
* Program:  C:\NHANES\CleanRecode_CheckSkip.sas                   *
* Proposal:  Check skip patterns for blood pressure questionnaire *
*******************************************************************;

libname NH "C:\your_dir";

/*change the name of the directory folder to the location that you saved your downloaded dataset
 from the sample code and dataset downloads module: for example "c:\nhanes\data"*/

/*Check ship pattern using cross table*/
Proc freq data=NH.demo_BP1;
where ridstatr=2 and ridageyr>=20; * interviewed and examined(ridstatr=2), adults age 20+;
	table BPQ020 BPQ030 BPQ050a BPQ020*(BPQ030 BPQ050a)/list missing;
	title 'Check skip pattern for BP questionnaire';
run;