Disability stories: personal perspectives of people with disabilities on navigating the U.S. health system.

Americans with disabilities and chronic illness or injury tend to be in poorer health, use more health services, and pay more for healthcare than those without disabilities. Consequently, their lives can be profoundly affected by federal and state health policies. The concerns of this population do not figure prominently in national health policy discourse and related public health and health services research efforts.

Testing informative missingness in genetic studies using case-parent triads.

In genetic studies, the transmission/disequilibrium test (TDT) using case-parent triads has gained popularity attributable to its robustness to population admixture. Several extensions have been proposed to accommodate incomplete triads. Some strategies assume that parental genotypes are missing completely at random (MCAR) to insure an unbiased conclusion and some methods allow parental genotypes to be missing informatively, resulting in reduced power when the missing data pattern is indeed MCAR.