Twin Studies

BACKGROUND Adolescent depression is a common neuropsychiatric disorder that often continues into adulthood and is associated with… Expand

Heritability is the proportion of phenotypic variation in a population that is attributable to genetic variation among… Expand

OBJECTIVE To examine the influence of genetic factors on plasma leptin levels. SUBJECTS AND METHODS We measured plasma leptin… Expand

A classical twin study was performed to assess the extent to which genetic factors explain individual differences in age at… Expand

Bone mineral density (BMD) and bone turnover are both heritable. Although bone turnover affects bone mass, it is not clear… Expand

This study was designed to assess the relative contributions of genetic and environmental factors to the variation and… Expand

Various studies have investigated potential predictors of age at natural menopause but have produced inconsistent results. The… Expand

Are the associations between muscle strength, lean mass, and bone mineral density (BMD) genetically determined? Based on within… Expand

The relative importance of genetic factors in determining bone mass in different parts of the skeleton is poorly understood… Expand

Coronary heart disease (CHD) risk factors were studied in 250 monozygotic (MZ) and 264 dizygotic (DZ) male veteran twin pairs… Expand