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A limited number of cow-side diagnostic techniques exist for the diagnosis of subclinical endometritis (SCE) in dairy cattle. The objectives of this study were to compare results of endometrial cytology from samples collected by cytobrush (CB) and low-volume lavage (LVL) and to assess leukocyte esterase (LE) test strips and Brix refractometry as surrogate cow-side tests for SCE. Two samples were consecutively collected from 248 Holstein cows between 29 and 35 days postpartum, using CB and LVL techniques. Each sample was analyzed using cytology with a cut-point of ≥5% polymorphonuclear (PMN) cells, LE strips using cut-points of ≥1 and ≥ 2, and a Brix refractometer. Each diagnostic technique was compared intra-sample using the respective cytology as a gold standard and inter-sample using CB samples as the referent. The concordance correlation coefficient (CCC, ρ_c) for PMN% between CB and …