Logistisk regression
Logistisk regression
Logistisk regression
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u n i v e r s i t y o f c o p e n h a g e n<br />
Eksempel 1: køn og CHD<br />
d e p a r t m e n t o f b i o s t a t i s t i c s<br />
Er der forskel på hyppigheden af CHD blandt mænd og kvinder<br />
Køn vs CHD<br />
> framing$chdI0,1,0)<br />
> framing$mand framingCHD attach(framingCHD)<br />
> table(mand,chdI)<br />
chdI<br />
mand 0 1<br />
0 616 104<br />
1 479 164<br />
> chisq.test(mand,chdI)<br />
Pearson’s Chi-squared test with Yates’ continuity correction<br />
data: mand and chdI<br />
X-squared = 25.6119, df = 1, p-value = 4.175e-07<br />
> fisher.test(mand,chdI)<br />
Fisher’s Exact Test for Count Data<br />
data: mand and chdI<br />
p-value = 3.831e-07<br />
alternative hypothesis: true odds ratio is not equal to 1<br />
95 percent confidence interval:<br />
1.530131 2.693462<br />
sample estimates:<br />
odds ratio<br />
2.026904<br />
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