Fig 1.
Flowchart depicting participant enrollment.
Table 1.
Demographic characteristics of participants stratified on age and gender.
Fig 2.
Adjusted mean values of heart rate variability among the three physical capability groups in old men (A) and women (B). All HRV indices were natural log transformed. All data were adjusted for age, body mass index, and comorbidity scores. The Y-axis represents the adjusted mean value. The error bar represents the 95% confidence interval. *indicates a significant difference compared with the low physical-capability group, P <0.05; ** P <0.01; *** P <0.001. #indicates a significant difference compared with the moderate-physical-capability group, P <0.05; ## P <0.01; ### P <0.001. SDNN = standard deviation of normal-to-normal (NN) intervals; rMSSD = root mean square of successive differences at rest; HF = high-frequency power.
Table 2.
Pearson correlation of HRV indices with potential factors and physical mobility, as assessed through regression analyses.
Table 3.
Stepwise linear regression analyses for all indices of heart rate variability.
Table 4.
Hierarchical regression analyses for heart rate variability.