3.8 Article

Using Potentially Preventable Severe Maternal Morbidity to Monitor Hospital Performance

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ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcjq.2022.11.007

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This study aims to adapt the Centers for Disease Control and Prevention (CDC) measure of severe maternal morbidity (SMM) for hospital performance measurement and evaluate it. The study found that the rate of potentially preventable SMM, as defined by pSMM, was less than half of the previously published rate of CDC SMM. Therefore, pSMM can be used for hospital performance comparison and quality improvement.
Background: The Centers for Disease Control and Prevention (CDC) measure of severe maternal morbidity (SMM) quantifies the burden of SMM but is not restricted to potentially preventable SMM. The authors adapted the CDC SMM measure for this purpose and evaluated it for use as a hospital performance measure.Methods: Guidelines for defining performance SMM (pSMM) were (1) exclusion of preexisting conditions from outcome; (2) exclusion of inconsistently documented outcomes; and (3) risk adjustment for conditions that preceded hospitalization. California maternal hospital discharge data from 2016 to 2017 were used for model development, and 2018 data were used for model testing and evaluation of hospital performance. Separate models were developed for hospital types (Community, Teaching, Integrated Delivery System [IDS], and IDS Teaching), generating model-based expected pSMM values. Observed-to-expected (O/E) ratios were calculated for hospitals and used to categorize them as overperforming, average performing, or underperforming using 95% confidence intervals. Performance categories were compared for pSMM vs. CDC SMM (excluding blood transfusion).Results: The overall 2016-2018 pSMM rate was 0.44%. All hospital types had over-and underperformers, and the pro-portions of Community, Teaching, IDS, and IDS Teaching hospitals whose performance differed from their performance on the CDC SMM measure were 12.1%, 25.0%, 38.9%, and 66.7%, respectively. Conclusion: The rate of potentially preventable SMM as defined by pSMM (0.44%) was less than half the previously published rate of CDC SMM (1.03%). pSMM identified differences in performance across hospitals, and pSMM and CDC SMM classified hospitals' performances differently. pSMM may be suitable for hospital comparisons because it identifies potentially preventable, hospital-acquired SMM that should be responsive to quality improvement activities.

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