Table 4 Univariate analysis of the occurrence of atrial fibrillation.

From: Higher heart rate variability as a predictor of atrial fibrillation in patients with hypertension

Variable

HR (95% CI)

P value

Age

1.050 (1.018–1.082)

0.002

Female gender

0.841 (0.463–1.527)

0.569

DM

1.490 (0.812–2.733)

0.198

CAD

2.219 (1.142–4.309)

0.019

CKD

1.540 (0.550–4.310)

0.411

Hemodialysis

6.298 (1.934–20.057)

0.002

History of CVA

1.467 (0.705–3.054)

0.306

Acute CVA

0.622 (0.307–1.260)

0.188

Chronic heart failure

2.700 (1.064–6.853)

0.037

Acute heart failure

3.257 (0.788–13.464)

0.103

History of AF

9.921 (5.478–17.969)

 < 0.001

VLF

1.019 (1.007–1.032)

0.002

LF

1.031 (1.015–1.047)

 < 0.001

HF

1.076 (1.044–1.108)

 < 0.001

LF/HF ratio

0.509 (0.242–1.070)

0.075

SDNN

1.004 (0.998–1.010)

0.208

ASDNN

1.017 (1.008–1.025)

 < 0.001

rMSSD

1.036 (1.023–1.049)

 < 0.001

pNN50

1.057 (1.035–1.080)

 < 0.001

BB50

1.000 (1.000–1.000)

0.003

Mean heart rate

0.960 (0.935–0.986)

0.003

PAC counts

1.000 (1.000–1.000)

 < 0.001

  1. DM, diabetes mellitus; CKD, chronic kidney disease; CAD, coronary artery disease; CVA, cerebrovascular accident; VLF, very low frequency; LF, low frequency; HF, high frequency; SDNN, standard deviation of the NN interval; ASDNN, average standard deviation of all 5-min RR intervals; rMSSD, square root of the mean squared differences of successive NN interval; pNN50, the percentage of RR intervals that are more than 50 ms different from the previous interval; BB50, the count of intervals that are more than 50 ms different from the previous interval.
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