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Table 5 Multivariable analysis with stepwise logistic regression (backward selection) on all variables

From: Heart rate n-variability (HRnV) and its application to risk stratification of chest pain patients in the emergency department

Variable

Adjusted OR

95% CI

Age

1.021

1.002–1.041

Diastolic BP

1.018

1.003–1.034

Pain score

1.082

1.003–1.168

ST-elevation

6.449

2.762–15.059

ST-depression

4.827

2.511–9.277

Q wave

3.383

1.668–6.860

Cardiac historya

7.838

5.192–11.832

Troponin

4.406

3.218–6.033

HRV NN50

0.981

0.970–0.991

HR2V skewness

0.806

0.622–1.045

HR2V SampEn

0.600

0.348–1.035

HR2V ApEn

0.095

0.014–0.628

HR2V1 ApEn

19.700

2.942–131.900

HR3V RMSSD

1.024

1.008–1.040

HR3V skewness

1.560

1.116–2.181

HR3V2 HF power

1.000

1.000–1.000

  1. BP Blood pressure, HRV Heart rate variability, OR Odds ratio, CI Confidence interval; mean NN, average of R-R intervals; RMSSD, square root of the mean squared differences between R-R intervals; NN50, the number of times that the absolute difference between 2 successive R-R intervals exceeds 50 ms; LF Low frequency, HF High frequency, SampEn Sample entropy, ApEn Approximate entropy
  2. aCardiac history was a numeric value that was derived from the narrative in the hospital charts. Its value was zero if the patient history contained characteristics of atypical cardiac chest pain; Its value was two if the history contained characteristics of typical cardiac chest pain; Its value was one if the history contained characteristics of both atypical and typical cardiac chest pain
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BMC Cardiovascular Disorders

ISSN: 1471-2261

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