Strawn M, et al. - Researchers performed this prospective, observational, cohort study evaluating consenting, adult, women that provided a clean catch, mid-stream sample at an inner-city emergency department to test their hypothesis that contaminated urine samples (UAs) are more frequently provided by patients with higher body mass index (BMI) vs women with low BMI. The study group comprised 350 patients; 22% overweight, 35% obese, 17% morbidly obese, mean BMI 31. 5. Contaminated specimens were provided by 60%. Multiple variable logistic regression model revealed a higher tendency of obese and morbidly obese patients to provide contaminated UAs, while no significant associations for contamination with other variables except for hypertension were identified.