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Table 6 Comparisons of lifetime performance of sows between six weaning-to-first-mating interval (WMI) groups1

From: Recurrence patterns and lifetime performance of parity 1 sows in breeding herds with different weaning-to-first-mating intervals

WMI groups in parity 1 (days) n Parity at removal Lifetime piglets born alive Lifetime non-productive days Annualized lifetime piglets born alive Annualized lifetime piglets weaned
Mean (± SE)
0–3 5909 5.6 (0.07)b 67.0 (0.90)b 76.5 (1.72)de 28.5 (0.21)ab 24.5 (0.17)b
4 43,178 5.8 (0.06)a 71.3 (0.80)a 77.1 (1.59)e 28.7(0.19)a 25.0 (0.16)a
5 55,378 5.8 (0.06)a 70.8 (0.79)a 78.3 (1.58)d 28.4 (0.19)b 24.9 (0.16)a
6 11,377 5.6 (0.06)b 68.6 (0.84)b 81.1 (1.65)c 28.0 (0.20)c 24.7 (0.17)b
7–20 18,219 5.5 (0.06)c 67.1 (0.82)c 88.3 (1.62)b 27.8 (0.20)d 24.3 (0.17)b
21 or more 9991 5.1 (0.06)d 62.3 (0.85)d 108.8 (1.66)a 26.6 (0.20)e 22.9 (0.17)c
  1. 1Means and SE were estimated by using mixed models
  2. a-eDifferent superscripts within a column represent significant differences in means (P < 0.05)