Stress Test   r p SDANN 0.205 0.041 SDNN -0.407 <0.001 SDNN INDEX 0.02 0.843 pNN50 -0.038 0.705 RMSSD -0.088 0.381 VLF 0.185 0.065 LF 0.004 0.972 HF -0.046 0.652

Table 6: Correlation of HRV Indices with Positive Stress Test.