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Table 3 Frequency domain indices in the different groups based on the last ECG recording

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 (24) 5575.0
(608.2-73164.0)
255.9
(8.6-13019.0)
95.88
(38.49-99.86)
4.12
(0.14-61.51)
23.3
(0.6-697.5)
2. Female negative (35) 2511.0
(117.7-49095.0)
151.0
(0.4-12872.0)
89.76
(49.46-99.92)
10.24
(0.08-50.54)
8.8
(1.0-1198.0)
3. Female positive (19) 2380.0
(394.6-9671.0)
267.9
(3.7-8866.0)
90.73
(35.02-99.36)
9.27
(0.64-64.98)
9.8
(0.5-156.1)
4. Male control (46) 5304.0
(914.2-39518.0)
140.8
(4.1-4037.0)
98.12
(45.44-99.94)
1.88
(0.06-54.56)
52.2
(0.8-837.5)
5. Male negative (270) 5447.0
(154.5-84706.0)
79.6
(3.3-20985.0)
98.58
(46.65-99.97)
1.42
(0.04-53.35)
69.3
(0.9-2856.0)
6. Male positive (27) 6717.0
(1142.0-37547.0)
102.2
(11.3-5229.0)
97.33
(72.72-99.95)
2.68
(0.05-27.28)
36.4
(2.7-1831.0)
P -value (Kruskal-Wallis test)
Significant differences between groups (Dunn's test)
< 0.0001
2 & 4, 5, 6 (**)
3 & 4, 5, 6 (*)
0.0022
None
< 0.0001
2 & 5 (*)
3 & 4 (*), 5 (***)
< 0.0001
2 & 5 (**)
3 & 4 (*), 5 (***)
< 0.0001
2 & 5 (**)
3 & 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.
  3. Dunn's post test P values are expressed as * (P < 0.05), ** (P < 0.01) and *** (P < 0.001).