Biostats question

[Eilat87]

How do you guys know how to arrange the categories? Disease vs Test? On top or on the side? I can get around it with the calculation of Odds ratio since I can just cross multiple but I can't do that with relative risk.

Oh yeah and obviously if it was just as simple as Disease vs Risk factor, I can just put disease on top and risk factor on side like First Aid says but it's not always those two variables that they give us.

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[johndoe3344]

If you always want to label the chart as the "typical"

a b
c d

then you always put disease on the top and risk on the side. To generalize that, put on the top the current "state" of the patient, and put on the side any modifications that you want to use. For example, a drug X vs placebo to see if longevitiy is increased -- you'd put the state of longevitiy (yes, no) at the top, and whether you got the drug (yes, no) at the side, where no = placebo.

 

[Eilat87]

Hmm.. That helps. Thanks!