The workshop focused on challenges that are specific to the types of longitudinal studies supported by NIA and aimed to identify areas of methodological research that could be pursued in order to ...

Discover how longitudinal data helps analyze financial trends, business risks, and economic changes with repeated observations of the same subjects over time.

In patients with isolated syndromes that are clinically suggestive of multiple sclerosis, such as optic neuritis or brain-stem or spinal cord syndromes, the presence of lesions as determined by T ...

We study quantile regression (QR) for longitudinal measurements with nonignorable intermittent missing data and dropout. Compared to conventional mean regression, quantile regression can characterize ...

A longitudinal, relationship-based case management approach significantly reduced health care costs and improved quality of life for Medicaid enrollees with complex needs over 1 year. Objectives: This ...

The National Longitudinal Study of Adolescent Health (AddHealth) is a nationally representative study that explores the causes of health-related behaviors of adolescents in grades 7 through 12 and ...

Physician-scientists at Oregon Health & Science University warn that exposure to air pollution may have serious implications ...