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Table 1 Distribution of number of finishers and sows for all conventional and organic pig herds registered in CHR in 2016 and for conventional and organic pig herds registered in CHR and with antimicrobial prescription data in VetStat in 2016. The p-value reflects the statistical differences in number of animals for conventional and organic pig herds

From: Antimicrobial prescription data in Danish national database validated against treatment records in organic pig farms and analysed for associations with lesions found at slaughter

  Herds in CHR Herds in CHR with antimicrobial prescriptions
Number of sowsa Number of finishersb Number of sowsa Number of finishersb
Conv. (N = 1949) Org. (N = 73) P-value Conv. (N = 5556) Org. (N = 102) P-value Conv. (N = 1755) Organic (N = 29) P-value Conv. (N = 4819) Organic (N = 51) P-value
Min 1 1 P < 0.01 1 2 P < 0.01 1 3 P < 0.01 2 10 0.04
1st quartile 250 4 300 17 350 100 300 445
Median 500 16 880 200 550 200 900 750
3rd quartile 750 200 1600 750 800 360 1700 1465
Max 3750 910 12,000 4000 3750 910 12,000 4000
  1. aIn herds with > 1 sow in CHR; bIn herds with > 1 finisher in CHR