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Table 1 Chemical composition in faecal samples from horses with (case) and without (control) free faecal liquid (FFL) in Sweden and Norway (sub-study I)

From: Chemical composition and physical characteristics of faeces in horses with and without free faecal liquid – two case-control studies

  Case Control P-value
Mean SD Mean SD
DM, g/kg 184.2 10.50 185.3 9.43 0.78
Ash, g/ kg DM 86.0 27.23 81.3 27.45 0.30
Sodium, g/ kg DM 2.2 2.09 2.1 1.79 0.25
Potassium, g/ kg DM 12.6 3.83 10.9 3.64 0.33
Calcium, g/ kg DM 4.3 1.57 4.1 1.60 0.68
Phosphorous, g/ kg DM 4.3 1.19 4.6 1.28 0.65
Magnesium, g/ kg DM 2.2 0.90 2.3 0.90 0.52
Sulphur, g/ kg DM 1.6 0.32 1.6 0.30 0.82
Ammonia-N, ml/g 119.1 70.13 126.5 80.12 0.67
Osmolality, osmol/kg 149.4 43.63 145.1 44.01 0.92
pH (log) 6.60 0.342 6.52 0.325 0.70
Lactic acid, mmol/l 1.9 2.42 2.3 2.15 0.04
Acetic acid, mmol/l 25.7 12.85 23.0 13.66 0.43
Propionic acid, mmol/l 7.9 4.00 7.3 3.99 0.56
i-Butyric acid, mmol/l 0.9 0.36 0.8 0.36 0.29
n-Butyric acid, mmol/l 2.4 1.66 1.9 1.54 0.34
i-Valeric acid, mmol/l 0.7 0.46 0.7 0.43 0.46
n-Valeric acid, mmol/l 0.5 0.19 0.5 0.20 0.98
Total SCFA, acid, mmol/l 41.6 19.64 39.0 19.84 0.49
C2 + C4/C3a 3.8 1.21 3.4 1.11 0.21
Lactic acid, % of SCFA 5.1 5.89 7.2 6.71 0.04
Acetic acid, % of SCFA 63.8 8.3 60.6 10.59 0.20
Propionic acid, % of SCFA 21.1 5.39 22.6 7.45 0.55
i-Butyric acid, % of SCFA 2.5 1.33 2.6 1.66 0.77
n-Butyric acid, % of SCFA 5.3 2.32 4.6 2.33 0.16
i-Valeric acid, % of SCFA 1.8 1.27 2.1 1.49 0.70
n-Valeric acid, % of SCFA 0.9 0.24 0.9 0.22 0.06
Sand, mm 0.1 0.13 0.0 0.04 0.05
Free liquid after centrifugation, ml 3.8 2.43 3.0 2.22 0.14
  1. aRatio between acetic acid (C2), propionic acid (C3) and butyric acid (C4)