Ranking hospitals on surgical quality: does risk-adjustment always matter?
Based on data from two prominent state registries, risk-adjusted and unadjusted mortality rates provide nearly identical estimates of hospital performance with coronary artery bypass. Risk-adjustment may not always be important for identifying high quality hospitals.
In female adolescents, BMI is inversely related to osteocalcin, even after consideration of several factors that may affect bone and fat mass. As bone mineral density, 25(OH)D and PTH did not differ between groups, it is possible that the relation between osteocalcin and BMI could be unrelated to bone tissue itself.