Interval -2 Interval -1 Interval i1 Interval i2 Interval +1
HR          
Epilepsy 75.0 (12.1) 75.1 (12.1) 79.8 (14.6) 79.2 (11.0) 78.3 (9.9)
PNES 75.1 (8.2) 77.6 (8.6) 78.2 (8.7) 79.4 (11.0) 74.3 (6.9)
RMSSD          
Epilepsy 0.055 (0.07) 0.057 (0.07) 0.059 (0.08)* 0.033 (0.02)** 0.054 (0.08)
PNES 0.074 (0.05) 0.066 (0.05) 0.081 (0.05) 0.085 (0.06) 0.068 (0.06)
SDANN          
Epilepsy 0.855 (0.62) 0.941 (0.60) 1.189 (0.60)* 0.921 (0.32) 0.928 (0.63)
PNES 0.817 (0.09) 0.787 (0.08) 0.797 (0.09) 0.789 (0.11) 0.835 (0.11)
VLF power          
Epilepsy 0.706 (0.22) 0.709 (0.21) 0.638 (0.20) 0.618 (0.16) 0.631 (0.15)
PNES 0.685 (0.15) 0.634 (0.12) 0.655 (0.16) 0.649 (0.17) 0.722 (0.20)
LF power          
Epilepsy 0.0010 (0.002) 0.0011 (0.001) 0.0013 (0.002) 0.0006 (0.000) 0.0011 (0.002)
PNES 0.0010 (0.001) 0.0015 (0.002) 0.0012 (0.001) 0.0013 (0.001)* 0.0011 (0.001)
HF power          
Epilepsy 0.0019 (0.005) 0.0023 (0.005) 0.0022 (0.005)* 0.001 (0.001)** 0.0019 (0.005)
PNES 0.0026 (0.004) 0.0026 (0.004) 0.0032 (0.003) 0.003 (0.004) 0.0024 (0.003)
LF/HF ratio          
Epilepsy 1.820 (1.12) 1.927 (1.42) 1.894 (1.13) 2.408 (2.24)* 2.176 (1.34)
PNES 1.549 (1.32) 1.711 (1.47) 1.298 (1.14) 1.150 (0.73) 1.504 (1.31)
PoincarĂ© plot parameters          
SD1          
Epilepsy 0.104 (0.06) 0.115 (0.06) 0.150 (0.06) 0.121 (0.04) 0.114 (0.06)
PNES 0.120 (0.06) 0.132 (0.07) 0.163 (0.05) 0.152 (0.06) 0.127 (0.06)
SD2          
Epilepsy 0.056 (0.06)* 0.061 (0.07) 0.066 (0.07)* 0.042 (0.03)** 0.058 (0.07)
PNES 0.079 (0.06) 0.083 (0.06) 0.099 (0.05) 0.097 (0.06) 0.082 (0.06)
SD1/SD2 ratio          
Epilepsy 2.740 (1.04) 2.787 (1.30)* 3.998 (2.23)* 3.864 (1.69)* 3.219 (1.57)
PNES 2.306 (1.05) 2.484 (1.29) 2.722 (1.91) 2.356 (1.55) 2.216 (1.10)
Table 2: Descriptive statistics of heart rate and heart rate variability parameters. Results are reported as Mean (SD). Abbreviations: HR=heart rate, RMSSD=root mean square of successive differences, SDANN=standard deviation of average beat-to-beat intervals, VLF=very low frequency, LF=low frequency, HF=high frequency, SD=standard deviation. * =Significant between-group differences for p<0.05. **=Significant between-group differences for p<0.01. Within-group differences are described in the text.