Table 4. Partial correlation between heart rate variability parameters and type D subscale scores after controlling for age in each participant group divided by age (adult group/ middle aged and aged group).

^*p<0.05. NA: negative affectivity, SI: social inhibition, HRV: heart rate variability, SDNN: standard deviation of the normal to normal interval, RMSSD: square root of the mean squared differences of successive normal to normal intervals, TP: total power, VLF: very low frequency, LF: low frequency, HF: high frequency, LF/HF: ratio of LF to HF, NS: not significant