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Table 3 Cows for which LS was recorded before and after ESD were classified into 1 of 4 categories: NN for cows never detected lame, YN for cows lame before ESD and LS <3 after ESD, NY for cows LS <3 before ESD and lame after ESD and YY for cows lame before and after ESD. SR, overall CR, number of serves per conception and Kaplan-Meier median survival time is shown for each lameness detection category

From: The effect of Lameness before and during the breeding season on fertility in 10 pasture-based Irish dairy herds

LS ≥ 3 detection categories N (%) SR (%) CR (%) serves/conception K-M median survival time (95 % CI)
NN 612 (79.4) 85.2 50.3 2.0 26 (24–30)
YN 47 (6.1) 66.0 59.1 1.7 33 (25–48)
NY 69 (8.9) 81.2 43.4 2.3 36 (24–70)
YY 43 (5.6) 72.1 41.4 2.4 43 (28–74)