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IHI QI 104; Interpreting Data; Run Charts, Control Charts, and Other Measurement Tools Test
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IHI QI 104; Interpreting Data; Run Charts, ControlCharts, and Other Measurement Tools Test
Use the following scenario to answer questions 1-2:
During a clinical rotation on the medical-surgical floor of a hospital, you notice several patients
have developed urinary tract infections (UTIs) associated with their Foley catheters (tubes inserted
into the bladder to drain urine). Your staff physician agrees that this is a problem and offers to
help with an improvement project. Together, you work through several PDSA cycles to reduce the
rate of UTIs on your floor.
Which of the following methods would you recommend to display your improvement data? -
answerDraw a run chart.
Run charts are an effective way to view changes over time. They are much easier to interpret
visually than a list of numbers or a static display of data such as a bar chart.
When designing the run chart, it is important to include: - answerUnits of time on the X axis
The run chart should display units of time — whether it's days, weeks, or months — on the X axis.
The Y axis is where you plot the key variable you are measuring, which in this case is the rate of
UTIs.
What is the minimum number of data points you should usually have to look for signs of
improvement on a run chart? - answer10
A run chart becomes more powerful as you add more data points because there will be more
opportunities to identify patterns. If you're looking for signs of improvement, usually you need at
least 10 data points.
Which of the following is a problem with static data? - answerIt doesn't adequately portray
variation.
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