QSO 510 Discussion 9 Reply - could lead to inappropriate...

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Hello Marchel, You gave a great example by mentioning the use of control charts in healthcare. They are definitely used for many reasons in this industry. Understanding, monitoring and controlling variation in clinical variables is an integral part of clinical practice. Changes in clinical variables, such as blood glucose levels or blood pressure measurements may be due to changes in the patients' underlying condition or biological processes, measurement error, or random variation. Monitoring systems need to be able to detect material changes in the clinical variable (i.e. detect a signal) from background noise to support appropriate clinical decision-making. Monitoring systems must also minimize false positives/negatives that may arise from background noise that
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Unformatted text preview: could lead to inappropriate clinical decision-making. Recently, statistical process control charts have been advocated for use in chronic disease monitoring. For example, the figure below represents an X-chart, showing daily systolic blood pressure (mmHg) readings for a hypertensive patient. The horizontal upper and lower dotted lines represent the upper and lower three-sigma control limits, respectively. The middle dotted horizontal line is the mean. Day 6 shows evidence of low-special cause variation. Tennant R., Mohammed M., J., & Martin, U. . (2007). Monitoring patients using control charts: a systematic review . Oxford University Press. Retrieved 2/21/16. http://intqhc.oxfordjournals.org/content/19/4/187....
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