Drill-down Graphs By Heather Hoffman

Family Practice Department Project  Create drill-down graphs that depict % of patients for each CCS* over a given year  CCS defines diagnostic groups based on ICD-9-CM diagnostic codes  Create a level 1 graph with links to 19 level 2 graphs  A patient may appear in more than one category *Clinical Classification System

What is a drill-down graph?  Has “hot zones” linked to target output  Create hot zones in graphic areas using HTML option  Provide link info by storing paths to target output in HTML variable  Idea is to provide link info needed to connect graph to related output

Using ODS to Generate Graphs  To create a drill-down graph, write a SAS program to:  Create initial chart using SAS/GRAPH software which will be primary chart in linked series of graphs  Create variable to hold HREF addresses for linked HTML files  Define values for new variable  Set ODS (Output Delivery System) output to HTML  Attach links to the primary chart  Create secondary, linked charts

Syntax  DATA SAS-data-set; SET SAS-data-set; IF expression THEN statement;IF expression THEN statement; <ELSE statement;> RUN; ODS LISTING CLOSEODS LISTING CLOSE; ODS HTML <PATH='html-file-path'>ODS HTML ;<BODY='html-file-name'> GOPTIONS ; TITLE<n> <'text' | "text">; PROC GCHART <DATA=SAS-data-set>;PROC GCHART ; HBAR chart-variable(s) HBAR chart-variable(s) HTML=chart-drill-down-variable;HTML=chart-drill-down-variable; WHERE where-expression; RUN; QUIT; ODS HTML CLOSE;QUIT;ODS HTML CLOSE;

PROC GCHART  General form, basic GCHART step: PROC GCHART ; chart-form chart-variable ; RUN; where: SAS-data-set=name of SAS data set to be used, chart-form=HBAR, VBAR, VBAR3D, PIE, PIE3D, chart-variable=variable determines # bars/pie slices, / (slash) indicates that options follow, and options are valid options for the chart form specified.

Options  DESCENDING  NOSTATS  SUMVAR=summary-variable  values of summary-variable are summarized for each unique value of chart-variable  default statistic is SUM (chart displays total of values of summary variable for each unique value of the chart variable)

More Options  HTML=variable  Identifies variable in input data set whose values create links in HTML file created by ODS HTML statement  Links are associated with an area of chart and point to graph to be displayed

QUESTIONS?