ANÁLISE DE SOBREVIDA José Maria Pacheco de Souza
ANÁLISE DE SOBREVIDA José Maria Pacheco de Souza
ANÁLISE DE SOBREVIDA José Maria Pacheco de Souza
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Figura 14a<br />
Análise caso-controle, com mo<strong>de</strong>lagem logística<br />
logistic evento droga, or<br />
Logistic regression Number of obs = 23<br />
LR chi2(1) = 8.42<br />
Prob > chi2 = 0.0037<br />
Log likelihood = -10.652331 Pseudo R2 = 0.2832<br />
-----------------------------------------------------------------------------------------------<br />
evento | Odds Ratio Std. Err. z P>|z| [95% Conf. Interval]<br />
- ------------+-------------------------------------------------------------------------------<br />
droga | 19.25 23.44832 2.43 0.015 1.768426 209.5437<br />
------------------------------------------------------------------------------------------------<br />
Obs.: outro comando equivalente é<br />
glm evento droga, eform family(binomial link(log)<br />
cc evento droga,woolf<br />
Figura 14b<br />
Análise caso-controle, sem mo<strong>de</strong>lagem<br />
| droga | Proportion<br />
| Exposed Unexposed | Total Exposed<br />
------------------+-----------------------------------+----------------------------<br />
Cases | 11 4 | 15 0.7333<br />
Controls | 1 7 | 8 0.1250<br />
------------------+-----------------------------------+-----------------------------<br />
Total | 12 11 | 23 0.5217<br />
| |<br />
| Point estimate | [95% Conf. Interval]<br />
|----------------------------------+---------------------------------------------<br />
Odds ratio | 19.25 | 1.768409 209.5457 (Woolf)<br />
Attr. frac. ex. | .9480519 | .4345198 .9952278 (Woolf)<br />
Attr. frac. pop | .6952381 |<br />
+--------------------------------------------------------------------------------<br />
chi2(1) = 7.74 Pr>chi2 = 0.0054<br />
Obs.: a odds ratio po<strong>de</strong> ser obtida fazendo a operação<br />
11x7/4/1= (11x7)/(4x1)<br />
PIRACICABA2009 apresentação.42.51
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