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Annotated monthly p’ Laney chart for AUR for all infants diagnosed with possible LOS. The solid light blue line represents the mean AUR. Broken red lines represent the upper control limits (UCL) and the lower control limits (LCL). The seven red points represent successive consecutive points above the mean and may constitute a “trend”; however, the Institute for Health Care Improvement uses the rule of 8 to prevent a type I error.
