For a school assignment I have to compute the population specific odds ratio and the subject specific odds ratio from the table below.

No GAD GAD Total

No MDD 350 (93%) 26 376 (62.7%)

MDD 153 71 224 (37.3%)

Total 503 (83.8%) 97 (16.2%) 600 (100%)

This is what I have on it so far:

The odds of no GAD in the no MDD group are 13.46 (350/26), and the odds of no GAD in the MDD group is 2.15 (153/71). The odds ratio in this case is 6.26 (13.46 / 2.15). So it can be said that the odds of having no GAD and no MDD is 6.12 times larger than the odds of having no GAD and having MDD.

Did I calculate the population or subject specific odds ratio there? And how to do the other one?