Loss of fat below the skin in the cheeks, temples, chin, nose, and eye area may result in loosening skin, sunken eyes, and a skeletal appearance. Bone loss, mostly around the mouth and chin, may become evident after age 60 and cause puckering of the skin around the mouth.
Logistic regression allows one to predict a discrete outcome, such as group membership, from a set of variables that may be continuous, discrete, dichotomous, or a mix of any of these. Generally, the dependent or response variable is dichotomous, such as presence/absence or success/failure.
A type of generalized linear model that uses statistical analysis to predict an event based on known factors. A logistics regression can make predictions about whether a customer will buy a product based on age, gender, geography, and other demographic data. Also called logistic model and logit model. http://www.businessdictionary.com/definition/logistics-regression.html.