Table 2 Description and analysis of continuous variables assessing risk factors associated with Salmonella in dairy farms
From: Risk factors associated with Salmonella in dairy cattle farms in Henan and Hubei provinces, China
Categories | Variables | Location | Median (IQRa) | p valueb | Statistical test |
|---|---|---|---|---|---|
Farm demographics | Farm size | Henan Hubei | 769.0 (523.0–1469.5) 297.5 (131.0–2559.0) | 0.077 | Kruskal‒Wallis test |
|  | Number of milking cows | Henan Hubei | 395.0 (253.0–755.0) 181.5 (95.9–1375.0) | 0.103 | Kruskal‒Wallis test |
|  | Years had been in operation | Henan Hubei | 8.0 (6.0–13.0) 11.5 (9.0–13.0) | 0.105 | t test |
|  | Number of workers cared for sick animals | Henan Hubei | 2.0 (1.0–3.0) 2.0 (1.0–3.5) | 0.903 | Kruskal‒Wallis test |
|  | Farm area (hectares) | Henan Hubei | 7.7 (5.3–14.2) 8.3 (4.0–20.0) | 0.945 | Kruskal‒Wallis test |
Rearing practices | Stocking density (m2/cow) | Henan Hubei | 24.0 (16.5–32.2) 27.9 (11.6–38.1) | 0.832 | Kruskal‒Wallis test |