A Natural History Study of Metabolic Sizing in Health and Disease

Description

Study Description:

This study will examine the relationships between comprehensively measured resting energy expenditure (REE), body composition, and body surface area (BSA) in a wide range of healthy and diseased individuals.

Objectives:

Primary Objectives:

* To compare estimated and measured BSA.
* To determine if measured BSA is associated with REE independent of body composition measures

Endpoints:

Primary Endpoints:

* Mean difference and limits of agreement at baseline between measured BSA and predicted BSA calculated from traditional biometrics such as height and weight.
* Increase in R^2 when measured BSA is added to equations predicting REE.