Table 3

Distribution of the continuous variables (at herd and pen level)
Variable Mean Standard deviation Minimum Percentile 25 Median Percentile 75 Maximum
Number of boars 3.9 3.9 0 2 3 4 28
Number of sows 226.5 192.9 8 98 170 300 1077
Number of gilts 34.0 38.3 0 12 22 40 300
Size of the herd (number of breeding pigs) 265.0 216.9 41 109 203 355 1214
Number of pigs per pen* 11.6 8.0 10 10 10 10 130

* 258 pens had more that 10 pigs per pen.

Correia-Gomes et al.

Correia-Gomes et al. BMC Veterinary Research 2012 8:226   doi:10.1186/1746-6148-8-226

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