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. 2018 May 29;9:623. doi: 10.3389/fphys.2018.00623

FIGURE 1.

FIGURE 1

(A) Visualization of the search process leading to the 19 publications selected for the review. (B–G) Kaplan–Meier plots obtained by different studies investigating the effect of several HRV parameters on the survival probability. (H,I) Dependence on log SDNN on patient characteristics in case of prostate cancer. (J) Dependence of heart rate complexity in breast cancer patients compared to healthy controls and subjects with diabetes. (K–M) Differences of HRV parameters comparing healthy controls and cancer patients (K–M) and cancer patients with or without metastasis (L). The subfigures (B–M) were created based on digitally extracting the numerical data from the published figures in the original published papers. For subfigure (H) and (I) the linear fit with predictions bounds was recalculated using Matlab (Natick, MA, United States). Statistically significant (p < 0.05) differences in the parameters comparing groups (see J,K–M) are indicated (∗).