Health care quality improvement experts often argue that "you can't
manage what you can't measure." Suitable yardsticks are essential to judge
the magnitude of potential quality problems and track whether interventions
improve care. However, this aphorism needs one critical addendum: "You can't
measure what you can't define."
Measurement and definitional issues loom large when discussing patient
safety. The bellwether 1999 Institute of Medicine report To Err Is Human provided compelling evidence that medical errors pose
daily risks throughout the US health care system but failed to quash controversy
about the magnitude of that risk.1 The best-known
estimates of the extent of medical error rely on extrapolations from medical
record review studies,2,3 although
these numbers have generated heated debate.4- 6
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Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature
Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal
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