To assess the relationship between depression and obesity among teenagers, a study was carried out to determine whether depression might be a risk factor. The study involved cases of high school students with a current diagnosis of depression, and healthy controls (students without a diagnosis of clinical depression). The results were stratified based on the occurrence of any previous depressive episode among the participants. The following tables indicate the results

Previous depressive episode:

	Obesity	No Obesity	Total
Depression	25	50	75
No depression	15	50	65
Total	40	100	140

No previous depressive episode:

	Obesity	No Obesity	Total
Depression	2	50	52
No depression	15	600	615
Total	17	650	667

What is the crude OR relating obesity to depression?

Group of answer choices

1.8

2.8

3.8

5.8

it is not appropriate to calculate the OR