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

We read with great interest the study by Radjabova et al,1 which evaluates concordance between the Minimum Data Set (MDS) I1500 item and estimated glomerular filtration rate (eGFR) for identifying kidney impairment in nursing home residents. The study has several important strengths, including its large multistate nursing home sample, linkage of MDS assessments with temporally matched laboratory records, use of resident-level bootstrapping to address repeated observations, and evaluation across both pandemic periods and 2 clinically relevant eGFR thresholds.