Concordance Between the Minimum Data Set Kidney Impairment I1500 Item and eGFR Records in Nursing Homes

Objectives To evaluate the concordance between the Minimum Data Set (MDS) version 3.0 I1500 item and estimated glomerular filtration rate (eGFR) laboratory values for identifying kidney impairment among nursing home (NH) residents. Design A retrospective cohort study was conducted using data from 8 multistate, multifacility NH chains from January 1, 2018, to July 1, 2022. MDS 3.0 assessments with a complete I1500 item were linked to eGFR values measured on the assessment reference date or within 7 days prior. Setting and Participants The study included NH residents with at least 1 MDS 3.0 assessment linked to a matching eGFR within a 7-day look-back window. Methods Concordance between the 2 measures was evaluated using sensitivity, specificity, positive predictive value, negative predictive value, and Cohen's kappa statistics, overall and stratified by pandemic periods (pre-pandemic, early pandemic, and late pandemic). We used an eGFR threshold of