Skip to main content

Table 1 Characteristics of herds included in the study given as the median, interquartile range and range or as the count and percentage of the entire group

From: Herd-level seroprevalence of Fasciola hepatica and Ostertagia ostertagi infection in dairy cattle population in the central and northeastern Poland

  Entire study population (n = 598) Province p
north-eastern (Podlaskie) (n = 394) central (Łódzkie) (n = 204)
Herd size 21, 15–30 (10–109) 24, 17–32 (10–109) 18, 14–25 (10–100) < 0.001
Average milk yield 5500, 460–6400 (1700–10,200) 5500, 4500–6400 (1700–10,200) 5200, 4800–6150 (3000–9360) 0.982
Grazing policy     < 0.001
 No grazing 264 (44.2%) 118 (30.0%) 146 (71.6%)
 6 h a day 66 (11.0%) 46 (11.7%) 20 (9.8%)
 12 h a day 179 (29.9%) 156 (39.6%) 23 (11.3%)
 24 h a day 89 (14.9%) 74 (18.7%) 15 (7.3%)
Length of grazing period in months (only grazed herds) 5 (1–8) 5 (1–8) 5 (1–7) 0.023
Main roughage     < 0.001
 Haylage 311 (52.0%) 273 (69.3%) 38 (18.6%)
 Corn silage 263 (44.0%) 103 (26.1%) 160 (78.4%)
 Hay 24 (4.0%) 18 (4.6%) 6 (3.0%)
Proportion of grazing grass in diet     < 0.001
 No grazing grass 203 (33.9%) 90 (22.8%) 113 (55.4%)
 Grazing grass < 50% of all roughage 204 (34.1%) 135 (34.3%) 69 (33.1%)
 Grazing grass > 50% of all roughage 191 (32.0%) 169 (42.9%) 22 (11.5%)