Table 4.  Heart rate variability measures at baseline, week six and week twelve. Data are means (ąSD).
 

Supervised

Home based

Control

Week

1

6

12

1

6

12

1

6

12

HF(ln)

4.10
(1.28)

4.39
(1.58)

3.98
(1.18)

3.61
(1.34)

3.30
(1.40)

3.88
(1.30)

4.02
(1.35)

4.40
(1.43)

4.17
(1.28)

LF(nu)

64.4
(22.0)

70.3
(21.2)

68.4
(14.3)

67.7
(21.2)

75.9
(15.3)

66.3
(14.3)

79.6
(20.0)

72.5
(18.8)

68.7
(24.8)

LF(ln):HF(ln)

1.33
(.45)

1.33
(.34)

1.22
(.28)

1.22
(.32)

1.54
(.43)

1.25
(.24)

1.48
(.43)

1.44
(.44)

1.38
(.28)

Mean RR-interval

756.6 (154.3)

766.3 (114.5)

799.8 (144.6)

773.0 (213.0)

748.1 (201.8)

808.4 (177.0)

840.5 (118.2)

824.4 (136.7)

836.6 (146.7)
HF(ln) = Natural logarithm of high frequency spectral power. LF(nu) = Low frequency spectral power in normalised units. LF(ln):HF(ln) = Ratio of natural logarithm of high frequency spectral power to natural logarithm of low frequency spectral power. RR = mean R-R interval from filtered ECG data.