Skip to main content

Table 6 Explanatory variables addressed in the models on ADG and mortality

From: The effect of New Neonatal Porcine Diarrhoea Syndrome (NNPDS) on average daily gain and mortality in 4 Danish pig herds

Explanatory variable Level Interpretation of levels
 Primary   
  Diarrhoea None The piglet was not diarrhoeic at any day
  1 day (during day 1) The piglet was diarrhoeic for one day - at the day of birth
  1 day (during day 2–5) The piglet was diarrhoeic for one day during the second to fifth day of life
  > 1 day The piglet was diarrhoeic for more than one day during the five day study-period
 Secondary   
Litter level   
  Parity Young 1st parity
  Mature 2nd – 7th parity
  Diarrhoeal status of litter (DSL) Severely affected 50% or more of the piglets in the litter were diarrhoeic for one or more days (the day of birth did not count)
  Mildly affected Less than 50% of the piglets of the litter were diarrhoeic for one or more days (the day of birth did not count)
Piglet level   
  Gender Male  
  Female  
Birth weight Continuous scale  
Skin abrasions Yes Skin abrasions on head or fore-knees at any point during the study period
  No No skin abrasions on head or fore-knees
Herd effect 1 Effect of being born in herd 1
  2 Effect of being born in herd 2
  3 Effect of being born in herd 3
  4 Effect of being born in herd 4