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Table 4 Estimates of fixed factors and random effect variance in the models for longevity and fertility 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 daysHerd-life daysHerd-life nonproductive daysParity at removal
 Fixed and random effectsEstimate (± SE)Estimate (± SE)Estimate (± SE)Estimate (± SE)
 Intercept936.64 (28.19)682.21 (28.19)61.04 (5.1580)4.49 (0.18)
 Age at first-mating0.2381 (0.0005)*− 0.7619 (0.0596)*0.0172(0.0099)*−0.0055 (0.0004)*
 Age at first-mating squared− 0.0010 (0.0005)*− 0.0010 (0.0005)*− 0.00013 (0.00009)− 0.000009 (0.000004)*
Herd size groups
 Small herds25.8010 (38.2240)*25.8010 (38.2240)*−0.2871 (6.9943)*0.1568 (0.2527)
Age at first-mating x Herd size
 Age at first-mating x Small-to-mid herds0.6360 (0.0710)*0.6360 (0.0710)*−0.0246 (0.0119)*0.0047 (0.0005)*
Herd productivity groups
 Ordinary herds−10.4434 (37.7297)−10.4434 (37.7297)9.8396 (6.9064)*−0.1535 (0.2493)
 Age at first-mating x Herd productivity
 Age at first-mating x Low herds−0.0949 (0.0704)−0.09492(0.0704)0.0219 (0.0117)−0.0008 (0.0005)
Herd size x Herd productivity
 Small-to-mid herds x Ordinary herds62.9712 (47.4994)62.9712 (47.4994)18.4513 (8.6888)*0.2775 (0.3141)
 Intercept variance at herd level937293722980.40
 ICC (records within the same herd), %6.36.37.65.3
  1. *indicates P < 0.05