Over the past decade, an increasing number of observational studies have examined the effectiveness or safety of treatments for rheumatoid arthritis. Unlike randomized controlled trials (RCTs), ...

CHICAGO -- A study comparing different statistical methods used to remove the effects of selection bias in observational studies finds that results may vary and caution may be warranted when ...

Mutational Analysis of Patients With Colorectal Cancer in CALGB/SWOG 80405 Identifies New Roles of Microsatellite Instability and Tumor Mutational Burden for Patient Outcome Comparative efficacy ...

Outside the field of statistics, the literature on observational studies offers advice about research designs or strategies for judging whether or not an association is causal, such as multiple ...

The pharmaceutical industry is facing growing pressure to make drug development more patient-focused. Traditionally, most observational research has been derived from clinical and payer data, but has ...

Nutritional epidemiology is notorious for producing sensational, conflicting results that confuse us all. We’re stuck with observational studies that can be twisted in countless ways to get different ...

Menopause hormone therapy neither increases nor decreases the risk for dementia or mild cognitive impairment in ...