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Table 1 Summary statistics for piglet deaths and related measurements

From: Five risk factors and their interactions of probability for a sow in breeding herds having a piglet death during days 0–1, 2–8 and 9–28 days of lactation

Measurements N Mean (± SD) Minimum Maximum
Farrowed parity 264,333 3.6 (2.1) 1 17
Gestation length, days 264,333 115 (1.5) 110 120
Number of piglets born alive 264,333 13.4 (3.5) 1 29
Number of stillborn piglets 264,333 1.06 (1.50) 0 23
Lactation length, days 264,333 25.1 (3.4) 21 40
Number of piglets weaned 264,333 11.5 (2.2) 0 39
Age when piglet died, days 256,604 2.40 (4.52) 0 38
Probability of a sow having a piglet death during early lactation (days 0–1), % 256,604 36.9 (48.2)
Probability of a sow having a piglet death during mid-lactation (days 2–8), % 256,604 27.0 (44.3)
Probability of a sow having a piglet death during late lactation (days 9–28), % 256,604 15.4 (36.1)
  1. SD standard deviation