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Table 1 Characteristics [percentage of observations for categorical variables and median (range) for continuous variables] of Swedish dairy herds participating in a questionnaire study of biosecurity and disease management in organic and conventional dairy production

From: Biosecurity and animal disease management in organic and conventional Swedish dairy herds: a questionnaire study

Variables Organic n = 91 Conventional n = 101 P valuea
Age (years) 50 (20–69) 53 (23–70) 0.07
Years in profession 25 (4–45) 28 (1.5–77) 0.63
Number of milking cows 80 (40–460) 75 (25–400) 0.13
Gender of the respondent
 Female 43.3 43.6 0.97
Geographical distributionb
 SE1 29.7 22.0 0.24
 SE21 19.8 22.0  
 SE22 5.5 15.0  
 SE23 27.5 22.0  
 SE3 17.6 15.0  
Milking system
 Parlour/rotary 41.1 30.7 < 0.001
 Automatic milking system 47.8 28.7  
 Pipeline/tie-stall 11.1 40.6  
Elementary agricultural school education
 Yes 75.3 62.4 0.06
Post-secondary school education
 Yes 62.5 45.5 0.02
  1. aKruskal–Wallis/Chi2
  2. bNUTS (Nomenclature of Territorial Units for Statistics) regions SE1 East Sweden, SE21 Småland and the islands, SE22 South Sweden, SE23 West Sweden, and SE3 North Sweden http://ec.europa.eu/eurostat/documents/345175/7451602/nuts-map-SE.pdf