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Table 5 Continuous variables and their levels collected from 1,127 piglets

From: Individual risk factors for Mycoplasma hyopneumoniae infections in suckling pigs at the age of weaning

   All piglets (n = 1,127) Mhyo neg. (n = 1,086) Mhyo pos. (n = 41)
Variable Unit Mean /SD/ Mean /SD/ Mean /SD/
Length of suckling period day 24.9 (3.9) 24.8 (3.9) 26.4 (2.7)*
Piglets’ weight at birth kg 1,4 (0.3) 1,4 (0.3) 1,4 (0.3)
Piglets’ weight at weaning kg 7,0 (1.8) 7,0 (1.8) 6,9 (1.6)
Daily weight gain g 225 (57) 225 (57) 207 (57)*
Temperature in the piglet nest at birth °C 35.0 (4.7) 34.9 (4.4) 34.8 (7.0)
Temperature in the piglet nest at 7 days °C 33.8 (2.9) 33.8 (2.9) 32.6 (2.5)
Temperature in the piglet nest at 14 days °C 32.7 (2.8) 32.8 (2.8) 31.8 (1.6)*
Temperature in the piglet nest at 21 days °C 33.1 (2.5) 33.1 (2.5) 32.5 (1.5)
  1. Using PCR results from suckling pigs’ nasal swabs as a binomial outcome variable, the incidence rate ratio (IRR; recognizing the first quartile within each variable as baseline in a univariable Poisson regression analysis) were calculated. Significant differences are indicated with asterisks.
  2. Figures have been assessed for litter-wise. If at least one piglet of a particular litter was positive for M. hyopneumoniae at weaning, then all temperatures of this litter were considered for Mhyo.pos.
  3. * P-value of IRR <0.05.