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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