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Table 3 Estimates (standard error: SE) and P-values of pre-weaning mortality (PWM) and sow herd size in the mixed-effects model for the number of piglets weaned and piglets weaned per sow per year (PSY) in 91 herds

From: A 10-year trend in piglet pre-weaning mortality in breeding herds associated with sow herd size and number of piglets born alive

Effects

Piglets weaned

PSY

Estimate (SE)

P-value

Estimate (SE)

P-value

Intercept (SE)a

10.1090 (0.1215)

<  0.01

22.5403 (0.4211)

<  0.01

PWM

− 0.0610 (0.0128)

<  0.01

− 0.1483 (0.0605)

<  0.01

PWM x PWM

−0.0011 (0.0009)

0.21

0.0093 (0.0046)

0.04

Sow herd size group

−0.1988 (0.1630)

0.23

−0.2279 (0.5288)

0.66

Sow herd size group x PWM

0.0175 (0.0120)

0.14

0.1197 (0.0582)

0.04

Year

0.0590 (0.0233)

0.01

0.3164 (0.1033)

<  0.01

Year x Year

0.0076 (0.0015)

<  0.01

0.0143 (0.0080)

0.06

Year x PWM

0.0010 (0.0017)

0.59

−0.0056 (0.0082)

0.49

Year x Sow herd size group

0.0017 (0.0225)

0.94

−0.1365 (0.0732)

0.06

  1. aSEs were obtained from the statistical model
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Porcine Health Management

ISSN: 2055-5660

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