2 Mantel-Haenszel Tests

1
(No Transcript)
2
(No Transcript)
3
2 Mantel-Haenszel Tests
Suppose we have k strata producing k tables such
as

• Mantel-Haenszel Test for association in
  stratified 2x2 tables
• O a1ak
• E (a1b1) (a1c1)/n1 (akbk) (akck)/nk
• M-H (O-E-0.5)2/V
• Mantel-Haenszel Test for common OR in stratified
  2x2 tables

4
Dataset EAR Column Variable
Format or Code ----------------------------------
------------------ 1-3 ID 5 Clearance by 14
days 1yes/0no 7 Antibiotic
1CEF/2AMO 9 Age 1lt2
yrs/22-5 yrs/36 yrs 11 Ear
11st ear/22nd ear -------------------------
---------------------------
5
Logistic Regression Analysis

• When to Use it
• Response is categorical
• Several Confounding factors or
• Numeric Covariates
• Logistic Regression model
• Logit(p) log(p/(1-p)) ??1x1 ?kxk

6
(No Transcript)
7
Odds Ratio Assume that x1 is a binary factor. B
is the group x10 A is the group x11 Then
the odds ratio OR pA(1- pA)/(pB(1- pB))
exp?1