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. 2019 Sep 25;9:13833. doi: 10.1038/s41598-019-50358-y

Table 2.

Bivariate correlation between clinical gastric cancer parameters and nonlinear HRV parameters.

FIB CEA CA199
ApEn (−0.09, 0.5) (−0.05, 0.7) (0.00, >0.9)
SampEn (−0.09, 0.5) (0.20, 0.1) (0.00, >0.9)
FuzzyEn (−0.25, 0.05) (0.05, 0.7) (−0.01, >0.9)
PermEn (0.38, 0.003) (0.35, 0.006) (0.03, 0.8)
CE (−0.08, 0.5) (0.05, 0.7) (0.13, 0.3)
DistEn (−0.21, 0.1) (−0.32, 0.01) (0.05, 0.7)
PI (−0.44, 0.0004) (−0.26, 0.05) (−0.25, 0.05)
GI (−0.20, 0.1) (−0.06, 0.6) (−0.27, 0.04)
SI (−0.17, 0.2) (−0.15, 0.3) (−0.20, 0.1)
AI (−0.19, 0.2) (0.04, 0.8) (−0.19, 0.1)
α1 (0.49, <0.0001) (−0.04, 0.8) (0.05, 0.7)
α2 (0.21, 0.1) (−0.05, 0.7) (−0.07, 0.6)

Values are expressed as (r, p).

Bold indicates statistically significant at p < 0.1. Abbreviations: ApEn = approximate entropy; AI = area index; BMI = body mass index; CA199 = carbohydrate antigen 19-9; CE = conditional entropy; CEA = carcinoembryonic antigen; DistEn = distribution entropy; FIB = fibrinogen; FuzzyEn = fuzzy entropy; GI = Guzik’s index; PermEn = permutation entropy; PI = Porta’s index; SampEn = sample entropy; SI = slope index.