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Table 5 Frequency domain indices in the different groups based on repeated ECG recordings over time

From: Time and frequency domain analysis of heart rate variability in cattle affected by bovine spongiform encephalopathy

Group a

(N cattle)

LF power [ms2]

Median

(range)

HF power [ms2]

Median

(range)

LF norm

Median

(range)

HF norm

Median

(range)

LF:HF power ratio

Median

(range)

1. Female control (8)

8604.0

(1668.0-61996.0)

2509.0

(32.3-7844.0)

89.2

(49.92-99.02)

10.8

(0.98-50.08)

13.14

(1.1-170.9)

2. Female negative (9)

6007.0

(1914.0-14428.0)

514.5

(172.2-4588.0)

88.36

(58.65-98.51)

11.64

(1.49-41.36)

10.7

(1.4-74.6)

3. Female positive (1)

2325.0

1076.0

69.37

30.63

6.6

4. Male control (22)

7273.0

(3691.0-45335.0)

110.4

(13.7-596.4)

98.02

(92.52-99.76)

1.98

(0.24-7.5)

125.9

(19.9-814.7)

5. Male negative (45)

6545.0

(2027.0-26832.0)

91.6

(3.3-651.7)

98.95

(90.85-99.83)

1.05

(0.17-9.15)

222.9

18.0-1282.0)

6. Male positive (14)

6960.0

(2486.0-33200.0)

163.6

(18.6-1743.0)

97.86

(86.61-99.84)

2.14

(0.16-13.39)

95.8

(25.3-997.1)

P -value (Kruskal-Wallis test)

Significant differences between groups (Dunn's test)

ns (0.6)

< 0.0001

1 & 5 (**)

2 & 5 (**)

< 0.0001

1 & 5 (**)

2 & 5 (**)

< 0.0001

1 & 5 (**)

2 & 5 (**)

< 0.0001

1 & 5 (**)

2 & 4 (*), 5 (***)

  1. a Negative: cattle inoculated with tissue/body fluids from BSE/scrapie-challenged or naturally infected BSE cases as well as reported BSE suspects that were negative for BSE by postmortem tests.
  2. Positive: challenged or naturally infected BSE suspects that were positive for BSE by postmortem tests. BSE-positive female cattle were included for completeness, even though the total number was too low for any statistical comparison.
  3. Dunn's post test P values are expressed as * (P < 0.05), ** (P < 0.01) and *** (P < 0.001).