Reporting Results in 2x2 Tables
Technical Summary
H0: The odds of a CA abnormality in the GG group is the same as in the ASA group (OR = 1).
H1: The odds of a CA abnormality in the GG group is not the same as in the ASA group (OR ≠ 1).
Level of significance: 0.05
Estimates of interest:
Conclusion:
Reject H0. There is significant evidence (at α=0.05) that the OR is not equal to 1 (p-value < 0.001). The estimated OR = 0.19 (95% CI= 0.0686, 0.5388) with the odds for developing CA abnormalities in the GG group being 0.19 times the odds for developing CA abnormalities in the ASA group.
Write-up
Methods
A chi-square test was performed to compare the probability of coronary artery abnormalities in patients with Kawasaki disease receiving gamma globulin treatment compared to those receiving aspirin treatment. We employed a 0.05 significance level for this test.
Results
We calculated an odds ratio of 0.19 with a 95% confidence interval of 0.0686-0.5388. With a p-value of 0.0007 we reject the null hypothesis and conclude that the odds of a CA abnormality in the GG group is not the same as the ASA group.