Table 1 Demographic and baseline heart rate variability indicators of patients with schizophrenia (SCZ) and healthy controls (HC). Continuous data are presented as the means ± the standard deviation (SD)

From: Olanzapine-induced weight gain plays a key role in the potential cardiovascular risk: evidence from heart rate variability analysis

Parameter

SCZ (n = 83)

HC (n = 46)

Statistics

P-value

Age (year)

35.02 ± 5.55

35.78 ± 6.53

t = 0.698

0.486

Gender (M/F)

28/55

17/29

χ2 = 0.135

0.713

BMIbaseline (kg/m2)

22.09 ± 2.65

21.63 ± 2.80

t = 0.923

0.358

Weightbaseline (kg)

60.22 ± 8.54

59.72 ± 8.23

t = 0.323

0.747

Education (years)

10.60 ± 3.21

10.48 ± 2.89

t = 0.218

0.828

Smoker/Non-smokers

24/59

16/30

χ2 = 0.476

0.490

FPGbaseline (mmol/L)

5.28 ± 0.28

5.23 ± 0.31

t = 0.892

0.374

Handedness (R/L/M)

65/7/11

38/4/4

χ2 = 0.599

0.741

SDNNbaseline (ms)

88.11 ± 13.76

99.61 ± 19.91

t′ = 3.484

0.001

LFnbaseline (n.u)

52.42 ± 8.74

46.49 ± 8.81

t = 3.676

0.000

HFnbaseline (n.u)

42.43 ± 8.70

47.64 ± 8.56

t = 3.272

0.001

LF/HFbaseline

1.38 ± 0.83

1.04 ± 0.45

t′ = 2.964

0.004

  1. M: male; F: female; R: right; L: left; M: mixed; BMI: body mass index; FPG: fasting plasma glucose; SDNN: standard deviation of the NN interval; LFn: normalized low frequency power; HFn: normalized high frequency power; n.u.: normalized unit.
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