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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).