Table 1 Plasma chemistry, electrolytes and high sensitivity cardiac troponin in heavy horse pulling competition: Samples on arrival (day 1), on the morning of competition (day 2, 3 or 4, depending on weight category), and 3 h after competition (number of horses indicated for each time point). The first column is based on all horses, with the other columns divided based on weight category. Median (Interquartile Range) shown

N =

34

26

20

8

7

3

12

8

8

14

11

9

Total protein

(g/L)

76.5

(71.3–81.3)

70.0 ^a

(68.3–72.8) (p < 0.001)

70.5 ^a

(66.0–74.0) (p < 0.001)

76.0

(72.0–80.3)

71.0

(69.5–72.5)

71.0

(69.5–73.5)

78.5

(70.8–90.0)

71.0

(70.0–72.8)

71.0

(68.0–74.3)

75.0

(69.0–79.0)

68.0

(62.0–72.0)

67.0

(66.0–73.0)

Albumin

(g/L)

32.5

(31.0–36.0)

29.5 ^a

(28.0–31.0)

(p < 0.001)

30.0 ^a

(28.0–32.0) (p < 0.001)

31.5

(30.0–32.5)

29.0 ^a

(29.0–30.0) (p = 0.02)

30.0

(29.0–31.0)

37.5

(32.5–39.0)

31.5 ^a

(27.8–33.5) (p = 0.003)

30.0

(29.0–34.3)

32.0

(32.0–34.0)

28.0 ^a

(26.5–30.0)

(p = 0.003)

30.0

(26.0–32.0)

Globulin

(g/L)

43.0

(39.3–46.8)

41.0

(39.0–43.0)

40.5

(37.0–42.0)

46.0

(42.5–47.8)

42.0

(40.0–43.0)

41.0

(40.5–42.5)

41.5

(39.8–51.0)

41.5

(38.8–43.5)

40.5

(39.0–41.3)

42.5

(39.0–45.0)

40.0

(37.0–43.0)

38.0

(37.0–42.0)

Creatinine

(mmol/L)

121.0

(102.8–144.0)

105.5 ^a

(92.5–111.75) (p = 0.001)

111.0 ^a

(89.8–120.3) (p = 0.001)

121.0

(113.0–155.0)

111.0 ^a

(105.0–112.0) (p = 0.015)

115.0

(113.0–118.0)

124.5

(118.0–179.3)

106.0 ^a

(96.0–110.0)

(p = 0.005)

107.0

(88.5–120.0)

109.5

(98.5–129.8)

94.0

(90.5–117.0)

100.0

(90.0–121.0)

Urea

(mmol/L)

5.9

(5.2–6.9)

4.6 ^a

(4.2–5.7)

(p < 0.001)

4.8 ^a

(4.2–5.7) (p < 0.001)

6.6

(6.4–6.9)

5.8 ^a

(5.6–6.5) (p = 0.047)

5.5

(5.2–6.5)

6.7

(5.9–10.5)

4.2 ^a

(3.7–5.0) (p = 0.004)

4.0

(3.4–5.2)

5.1

(4.9–5.7)

4.6

(4.5–4.9)

5.4

(4.4–5.6)

Osmolarity

(mmol/Kg)

267.0

(258.3–278.5)

256.0 ^a

(245.3–262.8) (p < 0.001)

250.5 ^a

(241.5–259.5) (p < 0.001)

267.5

(257.8–274.8)

261.0

(259.5–263.5)

258.0

(254.5–263.5)

281.0

(256.5–295.0)

257.5

(239.5–263.3)

242.0 ^a

(241.0–247.5) (p = 0.006)

267.0

(264.3–267.8)

247.0 ^a

(238.0–256.0) (p = 0.013)

250.0

(243.0–265.0)

Sodium

(mmol/L)

135.0

(128.5–138.8)

129.5 ^a

(123.3–131.0)

(p < 0.001)

125.5 ^a

(122.0–131.5) (p < 0.001)

134.0

(129.3–137.0)

130.0

(130.0–132.0)

131.0

(129.0–133.0)

140.0

(127.5–144.0)

129.0

(120.5–131.8)

123.0 ^a

(121.8–126.0) (p = 0.02)

134.0

(133.0–135.0)

125.0 ^a

(119.5–129.5) (p = 0.02)

125.0

(122.0–133.0)

Chloride

(mmol/L)

99.0

(96.0–103.0)

95.0 ^a

(86.0–98.0) (p = 0.004)

92.0 ^a

(82.8–96.0) (p = 0.004)

98.0

(90.0–102.0)

96.0

(93.0–97.0)

91.0

(86.0–95.0)

102.0

(95.5–105.3)

92.5

(83.0–99.5)

91.0 ^a

(82.3–94.3) (p = 0.01)

98.0

(97.0–101.0)

94.0

(89.0–98.0)

93.0

(88.0–101.0)

Potassium

(mmol/L)

3.4

(3.2–3.7)

3.3

(2.8–3.7)

2.9 ^a

(2.4–3.4) (p = 0.034)

3.45

(3.2–3.7)

3.6

(3.1–3.7)

2.3

(2.1–2.6)

3.3

(3.2–3.5)

3.3

(2.9–4)

2.8 ^a

(2.2–2.8) (p = 0.01)

3.3

(3.1–3.6)

3.2

(2.5–3.5)

3.3

(3.1–3.5)

CK (IU/L)

175.5 (150.3–253.0)

174.0 (127.8–325.3)

225.5 (142.0–887.5) ^a (p = 0.04)

214.0 (189.0–313.8)

215.0 (169.5–622.5)

294.0 (230.0–704.0)

175.0 (160.8–259.0)

143.5 (113.3–504.0)

209.0 (147.5–753.5)

167.0 (147.3–213.8)

178.0 (115.5–293.5)

231.0 (142.0–4544.0)

ALT

(IU/L)

7.0

(6.0–15.0)

6.5

(5.3–14.0)

9.5

(6.8–23.5)

6.0

(5.8–6.5)

7.0

(6.0–9.5)

7.5

(7.3–7.8)

11.5

(6.5–21.5)

14.0

(9.0–22.0)

14.5

(10.0–23.5)

7.0

(6.0–9.0)

5.0

(3.5–6.5)

6.0

(5.0–13.0)

cTnT

(ng/L)

2.9

(2.9–6.0)

2.9

(2.9–5.5)

4.0

(2.9–10.0)

2.9

(2.9–5.1)

2.9

(2.9–11.5)

15

(8.9–16.5)

4.0

(2.9–7.0)

2.9

(2.9–5.7)

3.5

(2.9–9.5)

2.9

(2.9–3.8)

2.9

(2.9–5.0)

4.0

(2.9–8.0)

Glucose

(mmol/L)

5.9

(5.4–6.6)

5.4 ^a

(5.0–5.6) (p = 0.026)

5.5

(5.1–5.8)

5.8

(5.1–6.1)

5.4

(5.2–5.7)

5.3

(5.2–5.4)

6.4

(5.9–7.2)

5.4 ^a

(5.2–5.8)

(p = 0.047)

5.8

(5.4–6.4)

5.8

(5.3–6.1)

5.0 ^a

(4.8–5.5) (p = 0.044)

5.5

(5.0–5.7)

T. bilirubin

(μmol/L)

26.4

(19.9–31.3)

17.7 ^a

(14.9–21.8) (p = 0.01)

17.8

(16.3–24.8)

25.0

(16.4–30.0)

15.0 ^a

(12.9–18.8) (p = 0.01)

19.3

(18.3–23.6)

48.3

(28.7–62.3)

18.7 ^a

(17.2–37.4) (p = 0.02)

18.4

(16.3–32.1)

21.8

(19.3–25.9)

17.5

(15.3–21.2)

17.3

(13.1–21.1)