A case-control study measured the association between myocardial infarction (hea

Question

A case-control study measured the association between myocardial infarction (heart attack) and feeling depressed. The result was an odds ratio of 1.72 with a 95% confidence interval of 1.34-2.20. What does the 95% confidence interval tell you? Is this study result statistically significant and how do you know? I am confused on how to answer because I think this is not significant given that 1.72 falls between the confidence interval but for odds ratio greater than 1.0 indicates that the odds of expsoure among case-patients are greater than the odds of exposure among controls. The expsoure might be a risk factor for the disease.

Explanation / Answer

We are 95% confident that the odd ratio is between 1.34 and 2.20.

Here the value 1.72 is with in the confidence interval so we can conclude that the result is not significant.

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