Day 5

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# Day 5 - PowerPoint PPT Presentation

Day 5. Proportions and Sample Size. Motivating Question. What factors are associated with mortality? ICU characteristics patient characteristics complications comorbid diseases. Confidence Intervals. ci death, bi ci death, bi by(phys) ci death, bi by(npnight)

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## PowerPoint Slideshow about 'Day 5' - shawn

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Presentation Transcript

### Day 5

Proportions

and

Sample Size

Motivating Question
• What factors are associated with mortality?
• ICU characteristics
• patient characteristics
• complications
• comorbid diseases
Confidence Intervals
• ci death, bi
• ci death, bi by(phys)
• ci death, bi by(npnight)
• ci death, by(nonwhite) bi
• ci death, by(reint) bi
Binomial Test
• Fisher’s exact test
• 2 test

tab

cc

cs

Fisher’s exact test
• tab death ruptured, exact col
• cs death ruptured, exact col
Fisher’s exact test
• gen diabetes=cond(mdmR==1 |sdmR==1,1,0)
• tab death diabetes, exact col
• cs death diabetes, exact
2test
• tab death reintub, chi col
• tab death reintub, chi exact col
Sample Size
• Comparing 2 means
• sampsi m1 m2, sd1(s1) sd2(s2)
• sampsi m1 m2, sd1(s)
• Comparing 2 proportions
• sampsi p1 p2
• Options
• power
• alpha