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LILACS (Latin American and Caribbean Health Sciences Literature)
An electronic database based on a regional database of medical and science literature. It is compiled by the Latin American and Caribbean Center for Health Science Information, a unit of the Pan American Health Organisation.

Logistic regression
A form of regression analysis that models an individual's odds of disease or some other outcome as a function of a risk factor or intervention. It is widely used for dichotomous outcomes, in particular to carry out adjusted analysis. See also meta-regression.

Log-odds ratio
The (natural) log of the odds ratio. It is used in statistical calculations and in graphical displays of odds ratios in systematic reviews.

Loss to follow up
See attrition.