Table I.18.
Association between milk yield and metabolic disorders
| Country | System | n (a) | ø Milk yield | Variable | Analysis (b) | Association | Reference |
|---|---|---|---|---|---|---|---|
| SE | Tie‐stalls, cubicles | 40, 20 (c) | 9,818, 9,308 kg ECM/cow‐year3 | KETO‐c or DISABO‐c | UA | (+) | Stengärde et al. (2012) |
| SE | Tie‐stalls, cubicles | 40, 20 (c) | 55, 51 max. kg ECM/day (LN > 1)3 | KETO‐c or DISABO‐c | MA | (+) | Stengärde et al. (2012) |
| SE | Tie‐stalls, cubicles | 40, 20 (c) | 41.6, 8.7 max. kg ECM/day (LN = 1)3 | KETO‐c or DISABO‐c | UA | (+) | Stengärde et al. (2012) |
| NL | Cubicles | 23 | sc: 35.7 kg, c: 36.2 kg, no: 34.5 kg4 | KETO‐c, KETO‐sc | MA | + | Vanholder et al. (2015) |
| DE, FR, IT, NL, UK | Cubicles, straw yard, tie‐st | 131 | na | KETO‐sc: BHB | MA | ns | Berge and Vertenten (2014) |
+ = positive association: significantly more metabolic disorders in herds with more milk yield (p < 0.05), (+) marginal (p ≥ 0.1) effect, ns = not significant.
(a)
Number of farms.
(b)
MA = multivariable analysis (in the case of univariable pre‐selection of factors only effects of the final models were considered), UA = univariable analysis.
(c)
40 high‐incidence herds, 20 low incidence herds.
(d)
sc = subclinical ketosis, c = clinical ketosis, no = no ketosis.