Correlation Between CMS Star Rating and HealthStream Jane ®
CMS quality measure results were downloaded directly from the CMS website . To map the CMS overall quality star rating and the Jane ® knowledge assessments score data by hospital , matching was made based on hospital name and address . Matching was carried out using the “ token sort ratio ” and “ token set ratio ” methods from the python library and verified with manual review .
Data Analysis
A linear regression analysis was conducted using the CMS overall star rating as the dependent variable and the average hospital knowledge assessment score as the independent variable . See Figure 1 for the joint plot between CMS overall quality star rating and hospitals ’ average Jane ® knowledge assessment score . When the average Jane ® knowledge assessment score increases , so does the CMS star rating . The coefficient for the average Jane ® knowledge assessment score was equal to 0.1202 ( p = 0.04 ). This indicates strong evidence against the null hypothesis , which as stated above , is that there is no correlation between hospitals ’ average Jane ® knowledge assessments score and CMS overall quality star rating , as there is only 4 % probability ( p = 0.04 ) the null hypothesis is correct . Therefore , the null hypothesis was rejected , and the alternative hypothesis was accepted .
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