Skip to main content
Search type Search syntax
Tags [tag]
Exact "words here"
Author user:1234
user:me (yours)
Score score:3 (3+)
score:0 (none)
Answers answers:3 (3+)
answers:0 (none)
isaccepted:yes
hasaccepted:no
inquestion:1234
Views views:250
Code code:"if (foo != bar)"
Sections title:apples
body:"apples oranges"
URL url:"*.example.com"
Saves in:saves
Status closed:yes
duplicate:no
migrated:no
wiki:no
Types is:question
is:answer
Exclude -[tag]
-apples
For more details on advanced search visit our help page
Results tagged with
Search options not deleted user 252997

Situations where a level of a categorical variable occurs very rarely (eg, a rare disease). This can be a problem especially when the variable is the response variable in a model.

0 votes
0 answers
51 views

How can I obtain reliable variance estimates for an exposure with low frequency?

I have a sample of 3000 observations. I wish to model the effect of a rare binary exposure (frequency of less than 50) on a binary outcome (frequency of 300). I also wish to adjust for approximately f …