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Table 3 Faecal particle size distribution (%, on DM basis) in horses with (case) and without (control) FFL in Sweden and Norway (sub-study I), and Germany (sub-study II) for sieve mesh sizes 8, 4, 2, 1 and <  1 mm. Average and standard deviation (SD)

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

Group Sieve mesh size
8 mm 4 mm 2 mm 1 mm <  1 mm
Case/ Control Case Mean 4.0 10.3 20.9 11.5 53.4
SD 2.93 4.95 5.98 8.18 14.50
Control Mean 3.6 11.0 22.0 11.4 52.1
SD 1.78 5.38 6.23 7.85 15.43
Sub-study Sub-study I Mean 4.3 8.1 17.8 5.8 64.0
SD 0.85 1.17 1.11 0.97 1.92
Sub-study II Mean 3.0 14.6 27.2 20.1 35.4
SD 3.59 6.32 6.35 6.23 8.21
p-value Case/ Control   0.83 0.41 0.30 0.95 0.18
Sub-study   0.59 0.05 0.005 < 0.0001 < 0.0001