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Table 4 Multivariate logistic regression analyses: heart rate variability indices (independent variables) categorized by tertiles and their respective odds ratios for the presence of peripheral arterial disease (dependent variable)

From: Cardiovascular autonomic neuropathy in type 2 diabetes mellitus patients with peripheral artery disease

 

Odd ratio*

95%CI

P

Time domain indices

SDNN day

1st tertile

6.08

1.24 - 29.90

0.026

2nd tertile

0.80

0.20 - 3.90

0.784

3rd tertile

1.0

-

-

SDNNi night

1st tertile

7.67

1.60 - 37.30

0.012

2nd tertile

1.14

0.20 - 6.20

0.878

3rd tertile

1.00

-

-

Frequency domain indices

High Frequency

1st tertile

7.37

1.50 - 37.30

0.016

2nd tertile

5.16

0.90 - 30.00

0.068

3rd tertile

1.00

-

-

Low Frequency

1st tertile

6.17

1.10 - 35.10

0.040

2nd tertile

4.00

0.70 - 24.40

0.129

3rd tertile

1.00

-

-

High Frequency / Low Frequency Ratio

1st tertile

7.42

1.50 - 37.10

0.015

2nd tertile

2.01

0.40 - 11.30

0.392

3rd tertile

1,00

-

-

Tridimensional return map

P 1 night

1st tertile

2.67

0.60 - 11.80

0.195

2nd tertile

0.73

0.10 – 4.10

0.720

3rd tertile

1.00

-

-

P 2 day

1st tertile

8.42

1.50 - 47.50

0.016

2nd tertile

2.59

0.40 - 15.90

0.305

3rd tertile

1.00

-

-

  1. * the odds ratio was adjusted for diabetes duration, HbA1C, hypertension, serum triglycerides, and urinary albumin excretion in each model. SDNN= SD of the R-R intervals; SDNNi = mean of the SD of R-R intervals calculated in 5-min segment; P1 = index reflecting sympathetic modulation; P2 = index reflecting vagal modulation; upper index tertile (3rd) for each index was considered as the reference (OR = 1).