Peter:
There are two issues here: First, should age be added as a single
linear variables. Lets say you are interested in whether or not a
women gets a child, and the variable age has a range of 0-100 years.
Adding it as a linear term would clearly be nonsense. In this case I
would start with creating a series of dummies: say 0-12, 12-18, 18-
30, >30. So how you want to include a variable depends on how you
think the variable effects the probability of experiencing the event
(= your theory).
Second, some recent posts have suggested that there are still
problems after you correctly entered the controll variable: see
http://www.stata.com/statalist/archive/2004-10/msg00694.html
Maarten
> I am doing a logistic regression to determine the effect of risk
> factors to the outcome. What I want to do is adjust for age and I
> am including the age variable (continuous) into the model. What I
> am not sure of is if this is the right approach.
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