1. EXCEL’ing at : June 19, 2003 Ruth Sanderson, Epidemiologist

2. Overview Why Innovate? RRFSS analysis requirements and analysis tools Overview of AutoCi Output, Description Demonstration of AutoCI Tricks Conclusions

3. Why Innovate? Needed faster way to comply with Analysis Guidelines: Denominator cell size<30 not to be released Numerator cell size<5 not to be released Coefficient of Variation >33.3 not to be released (16.6-33.3 interpret with caution) Estimates include 95% confidence intervals

4. Why Innovate? Wanted: Excel graphs with error bars that can be pasted into a Word document for a clean report

5. Current Analysis Tools SPSS Syntax files or crosstab to get unweighted/ weighted estimates –Does not provide CV, CI or flag small cells Confidence Interval Syntax File from P. Holowaty, 1999 –Requires transcription of numbers- prone to human error & labour intensive

6. AutoCI - Output Overview Outputs: 3 Components in Excel Spreadsheet: Unweighted Table Weighted Table –Includes CI, CV and Warnings in Colour Excel Bar Graph with Error Bars –Basis for customized Graphs

7. AutoCI Overview- Output

8. AutoCI Output Warnings Linked back to unweighted table

9. Output Graph & Error Bars

10. Auto CI- How does it Work? Run SPSS Syntax File calls on a script file Script File: – instructs SPSS to copy and past the unweighted and weighted output tables into Excel –instructs macro in Excel to run and return to SPSS Excel macro calculates CI’s, CV’s, inserts warning colours & creates graph/ error bars

11. Auto CI- What do you need to make it Work? Software: SPSS, Excel SPSS file title: test.sps Excel file titled: autoci.xls Files by B. Lueske, MLHU must have already established/created variable of interest & proper weight variable Demo

12. Conclusions AutoCi builds on and is dependent on the work of other RRFSS partners –syntax files, CI calculator, weighting calculations, analysis requirements AutoCI automates analysis requirements –calculating CV’s, CI, small cell count identification AutoCi provides quick visual of differences in estimates –Excel bar graph with error bars that can be modified or pasted into Word documents