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. 2021 Mar 8;7:25. doi: 10.1186/s40813-021-00205-2

Table 4.

Results of the continuous variables in the questionnaire

Variable median min max
How long are you already working with the same origin farm (years)? (n = 18) 5 1 12
What is the frequency of purchasing breeding gilts (times per year)? (n = 39) 6 1 13
What is the age of the purchased breeding gilts (weeks)? (n = 39) 24 9 37
What is the minimum duration of the quarantine period (days)? (n = 37) 42 14 140
What is the stocking density of the breeding gilts kept in group housing (m²)? (n = 53) 1.00 0.75 5.00