Crude M-H combined 2.256993 2.279816 Test of homogeneity (M-H) 1.870088 2.723988 2.742356 1.895291 chi2 (8) - 8.22 Pr>chi2 = 0.4127 Test that combined OR 1: Mantel-Haenszel chi2(1) - Pr>chi2 c. Is birth-year a confounder? Briefly explain 79.34 0.0000 (exact)
Crude M-H combined 2.256993 2.279816 Test of homogeneity (M-H) 1.870088 2.723988 2.742356 1.895291 chi2 (8) - 8.22 Pr>chi2 = 0.4127 Test that combined OR 1: Mantel-Haenszel chi2(1) - Pr>chi2 c. Is birth-year a confounder? Briefly explain 79.34 0.0000 (exact)
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
Transcribed Image Text:2. The following exercises are based on a study by Scholer et el. (1997). This was
a nested case-control study obtained from a cohort of children age 0 through 4
years in Tennessee between January 1, 1991 and December 31, 1995. Case
patients consist of all cohort members who suffered injury deaths. Control
patients were frequency matched to case patients by birth year. The variables
are;
Pnclate
Byear
injflag
byear
986
987
988
989
990
991
993
994
995
Crude
M-H combined
Illegit
OR
=
1.366071
1.171363
3.292431
2.18427
2.561502
2.484556
2.431203
2.900458
1.894737
2.256993
2.279816
Test of homogeneity (M-H)
year of birth
1:
a. The results below were obtained using the Mantel-Haenszel estimate of birth-
year adjusted odds ratio for injury death among children with unmarried
mothers compared with those with married mothers. Note: the reference group
is married mothers.
cc injflag illegit, by (byear)
{
if subject died of injuries
0:
otherwise,
1: if no prenatal care was received in the first four
months of pregnancy
0: if such care was given, or if information is missing.
1: if born out of wedlock
{
0: otherwise.
[95% Conf. Intervall
.6399061 2.796052
.5360591 2.439314
1.579069 6.964359
1.209814 3.917627
1.766975 3.715594
1.431054 4.341334
1.368645 4.347954
1.52875 5.604574
.6730893 5.306853
1.870088
1.895291
chi2 (8) -
Test that combined OR 1:
2.723988
2.742356
M-H Weight
8.22 Pr>chi2 = 0.4127
Mantel-Haenszel chi2(1) -
Prochi?
c. Is birth-year a confounder? Briefly explain
(.817391 (exact)
.181176 (exact)
4.27451 (exact)
8.005997 (exact)
17.86557 (exact)
3.693706 (exact)
3.144118 (exact)
6.122592 (exact)
3.166667 (exact)
0.0000
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