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Table 2 Comparison of particle size distributions according to dietary treatments (HS vs. HF)

From: A high-starch vs. high-fibre diet: effects on the gut environment of the different intestinal compartments of the horse digestive tract

  

HS

HF

p-value

Diet

Sex

Diet*Sex

SI

 

n.a.

n.a.

   

CAE

8 mm

3.41 (2.91–8.58)

2.76 (1.17–4.06)

0.09

0.35

0.70

4 mm

11.14 (7.39–14.48)

21.15 (10.53–27.93)

0.06

0.89

0.30

2 mm

7.75 (0.88)

14.31 (1.39)

< 0.01*

0.20

0.94

1 mm

6.34 (0.65)

7.46 (0.82)

0.17

0.22

0.33

< 1 mm

69 50 (2.83)

54.33 (3.92)

0.02*

0.87

0.49

8 mm

4.68 (0.37)

1.86 (0.29)

< 0.01*

0.52

0.52

4 mm

18.73 (2.39)

23.71 (2.43)

0.24

0.77

0.58

SF

2 mm

11.55 (1.69)

17.92 (2.07)

0.01*

0.54

0.05*a

1 mm

7.48 (0.57)

8.22 (0.64)

0.42

0.82

0.71

< 1 mm

57.54 (2.92)

48.27 (1.40)

0.01*

0.90

0.23

8 mm

3.65 (2.31–6.27)

1.34 (1.09–2.47)

0.03*

0.76

0.31

4 mm

17.85 (1.92)

25.95 (2.64)

0.05*

0.49

0.05*b

PF

2 mm

10.58 (1.21)

15.78 (0.78)

< 0.01*

0.39

0.34

1 mm

7.31 (5.12–11.13)

6.39 (5.83–6.95)

0.75

0.87

0.48

< 1 mm

59.21 (3.38)

48.97 (1.94)

0.03*

0.52

0.33

8 mm

4.54 (2.17–5.98)

1.65 (1.01–2.30)

< 0.01*

0.18

0.96

4 mm

21.70 (1.93)

25.67 (2.14)

0.20

0.26

0.62

RDC

2 mm

1.75 (1.55)

18.14 (1.64)

0.06

0.57

0.85

1 mm

6.64 (4.94–8.97)

6.78 (6.42–7.46)

0.82

0.75

0.91

< 1 mm

54.03 (3.37)

47.30 (1.57)

0.12

0.56

0.60

8 mm

3.75 (0.52)

2.13 (0.27)

0.02*

0.08

0.85

4 mm

19.28 (1.81)

33.13 (2.76)

< 0.01*

0.67

0.16

RE

2 mm

12.92 (1.21)

17.90 (2.21)

0.07

0.50

0.49

1 mm

10.29 (1.31)

9.20 (1.76)

0.56

0.41

0.86

< 1 mm

53.72 (2.29)

37.61 (1.91)

< 0.01*

0.68

0.27

  1. Values are expressed as a percentage (%) of particles, on a dry matter basis, retained by each sieve (8, 4, 2, 1 and < 1 mm)
  2. Data not normally distributed are expressed as medians (25th–75th percentiles); data normally distributed are expressed as means (SEM)
  3. HS high starch, HF high fibre, SI small intestine, n.a not analysed according to methods section, CAE apex of the caecum, SF ventral diaphragmatic flexure of the colon, PF pelvic flexure, RDC right dorsal colon, RE rectum. *statistical significance p < 0.05
  4. *amales HF 21.2 (13.27–27.67)A; females HF 17.72 (14.35–21.82)A; females HS 14.84 (12.08–17.46)AB; males HS 8.5 (3.48–10.55)B. A,B p < 0.05
  5. *bfemales HF 26.04 (18.16–37.86)A; males HS 21.72 (19.55–27.58)AB; males HF 22.22 (17.81–28.07)AB; females HS 14.73 (11.94–15.14)B. A,B p < 0.05