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Day 5

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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Day 5

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  1. Day 5 Proportions and Sample Size

  2. Motivating Question • What factors are associated with mortality? • ICU characteristics • patient characteristics • complications • comorbid diseases

  3. 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

  4. Binomial Test • Fisher’s exact test • 2 test tab cc cs

  5. Fisher’s exact test • tab death ruptured, exact col • cs death ruptured, exact col

  6. Fisher’s exact test • gen diabetes=cond(mdmR==1 |sdmR==1,1,0) • tab death diabetes, exact col • cs death diabetes, exact

  7. 2test • tab death reintub, chi col • tab death reintub, chi exact col

  8. 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

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