Article Document Academic Article Information Content Entity Continuant Continuant Journal Article Entity Entity Generically Dependent Continuant 2025-06-24T22:02:55 RDF description of Validation of lactational mastitis diagnosis codes in electronic health care data - http://repository.healthpartners.com/individual/document-rn38277 2024-12-31T17:58:18.897-06:00 Research Support public Drugs and Drug Therapy Breastfeeding Data Medical Records Systems, Computerized <p>BACKGROUND: Electronic health record (EHR) data are an underused source for lactation-related research. The validity of ICD-10-CM-coded lactational mastitis is unknown. <br>METHODS: We assessed lactational mastitis diagnosis code validity by medical record review. We included patients from three healthcare systems with a live birth between December 2020-September 2022 whose infant had � 1 well visit and for whom there was EHR documentation of lactation in patient or infant records. We used ICD-10-CM diagnosis codes (N61.0 and O91.2) to identify patients with suspected lactational mastitis and assessed antibiotic dispensings. We performed medical record reviews on a random sample to determine whether suspected lactational mastitis cases met definitions for "probable" (breast symptoms with systemic symptoms) or "possible" (breast symptoms without systemic symptoms) lactational mastitis. We report positive predictive values (PPV) with 95% confidence intervals (CI). <br>RESULTS: Among 19,660 eligible patients, 1,023 (5.2%) had either N61.0 or O91.2 diagnosis code, and 768 (3.9%) had a diagnosis code and antibiotic dispensed. Chart reviews of 119 identified PPV of 76% (95% CI: 67.3, 82.9) for probable and 97% (95% CI: 91.6, 98.7) for probable or possible lactational mastitis. Restricting to those dispensed an antibiotic (n=87), PPVs improved to 80% (95% CI: 69.6, 87.4) for probable and 100% (95% CI: 95.8, 100) for probable or possible lactational mastitis. <br>CONCLUSIONS: Diagnosis codes alone have good PPV for lactational mastitis. PPV for lactational mastitis improves when including antibiotic data, although case numbers decrease. Future research may consider use of ICD-10 codes alone for identification of lactational mastitis.<p> document-rn38277 Epidemiology (Cambridge, Mass.) 2 Antibiotics 10.1097/ede.0000000000001823 36 40844 Validation of lactational mastitis diagnosis codes in electronic health care data 23602