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Table 5 Estimates of the effects of the factors studied on feed conversion ratio in 683 batches from 93 grow-finishing pig farms

From: Factors affecting the daily feed intake and feed conversion ratio of pigs in grow-finishing units: the case of a company

Variable Category Mean (kg/kg) Estimate (s.e.) 95 % CL
Low Upper P-value
Intercept   1.43 (0.10) 1.23 1.62 < 0.001
No pigs per pen < 20 2.40 −0.05 (0.01) −0.07 −0.03 < 0.001
  > 20 2.45 0
Type of feeder Others (linear dump) 2.41 −0.03 (0.01) −0.06 −0.00 0.04
  Conical semiautomatic 2.44 0
ORIGSEX SPU/barrows 2.43 −0.02 (0.01) −0.03 0.00 0.09
  SPU/females 2.40 −0.05 (0.01) −0.07 −0.03 < 0.001
  SPU/mixed 2.42 −0.03 (0.01) −0.04 −0.01 < 0.001
  Farrow-to-finish/mixed 2.44 0
IW   0.035 (0.002) 0.03 0.04 < 0.001
FW   −0.01 (0.00) −0.01 −0.01 < 0.001
DGF   0.015 (0.001) 0.01 0.02 < 0.001
  1. s.e. standard error, CL confidence level, ORIGSEX variables ¨origin ¨ and ¨sex¨ combined, SPU specialized piglet production unit, IW initial weight, FW final weight, DGF duration of the grow-finishing phase