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. 2013 Jun 12;8(6):e65766. doi: 10.1371/journal.pone.0065766

Table 6. Health event traits: descriptive statistics.

Condition Frequency Mean Std. Deviation maximum
Clinical mastitis 0.01 0.29 0.58 3
Reproductive problems 0.04 0.87 0.89 4
Lameness 0.08 1.10 1.22 8

Frequency refers to the proportion of cows with a condition on the week of the immunological analysis; mean, standard deviation and maximum refer to number of distinct episodes per lactation.