Change point detection has been recognized as an essential effort of root cause analyses within quality control programs since enables clinical experts to search for potential causes of disturbance in hospital outcomes more effectively. In this paper, we consider estimation of the time when a drop has occurred in the mean survival time observed over patients undergone an in-control cardiac surg...

OBJECTIVE Nearly all hospital-specific comparative analyses, based on administrative data, are presented using cross-sectional displays. In this paper, we compare cross-sectional analyses with sequential monitoring using control charts. DESIGN ANALYSIS of administrative data to compare cross-sectional funnel plots with one type of control chart: the risk-adjusted, expected-minus-observed p...

INTRODUCTION Patient-safety monitoring based on health-outcome indicators can lead to misinterpretation of changes in case mix. This study aimed to compare the detection of indicator variations between crude and case-mix-adjusted control charts using data from thyroid surgeries. METHODS The study population included each patient who underwent thyroid surgery in a teaching hospital from Januar...

BACKGROUND The objective of this study was to evaluate risk-adjusted sequential probability ratio test control charts for the detection of significant discrepancies between institution or individual interventional cardiologist postprocedural mortality rates and national or local event rate expectations. METHODS Eight thousand nine hundred forty-two percutaneous coronary interventional procedu...

In order to achieve the maximum flexibility in adaptation to ever changing customer’s expectations in customer relationship management, appropriate measures of customer behavior should be continually monitored. To this end, control charts adjusted for buyer’s/visitor’s prior intention to repurchase or visit again are suitable means taking into account the heterogeneity across customers. In the ...

OBJECTIVE Customized growth charts developed for singleton pregnancies have been shown to be more effective than population-based ones at identifying small-for-gestational age (SGA) fetuses at risk for intrauterine fetal death (IUFD). We sought to compare the association between SGA and IUFD in twins using customized growth charts designed for twin gestations compared to those designed for sing...