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Table 5 Estimates of fixed factors and random effect variance in the models for reproductive efficiency and prolificacy measurements

From: Increased age at first-mating interacting with herd size or herd productivity decreases longevity and lifetime reproductive efficiency of sows in breeding herds

 Sow life annualized
piglets weaned
Herd-life annualized
piglets weaned
Lifetime piglets weanedLifetime piglets born alive
Fixed and random effectsEstimate (± SE)Estimate (± SE)Estimate (± SE)Estimate (± SE)
 Intercept19.7364 (02965)27.6631 (03307)57.4532 (1.8624)64.1534 (4.1551)
 Age at first-mating- 0.0295 (0.0008)*−0.0054 (0.0008)*−0.0529 (0.0046)*−0.0548(0.0054)*
 Age at first-mating squared0.000009 (0.000007)−0.0001 (0.000007)−0.00004 (0.00005)− 0.00001 (0.00005)
Herd size groups
 Small herds0.3781 (0.4014)0.2285 (0.4481)2.0886 (2.5230)0.0779 (0.0087)
Age at first-mating x Herd size
 Age at first-mating x Small-to-mid herds0.0076 (0.0010)*0.0023 (0.0009)*0.0402 (0.0055)*0.0469 (0.0154)*
Herd productivity groups
 Ordinary herds−1.7451 (0.3955)*−2.3670 (0.4421)*−4.9031 (2.4883)−5.0191 (5.8705)
Age at first-mating x Herd productivity
Age at first-mating x Ordinary herds0.0036 (0.0010)*0.0023 (0.0009)*0.0012 (0.0051)−0.03710 (0.0068)
Herd size x Herd productivity
 Small-to-mid herds x Ordinary herds−0.6814 (0.4994)−1.2828 (0.5571)*−0.1372 (3.1372)− 0.4006 (3.9637)
 Intercept variance at herd level1.031.3442.067.5
 ICC (records within the same herd), %4.04.45.15.8
  1. *indicates P < 0.05