Table 5. Correlations in parameters studied in the novel object test with regard to the age of horse
| Behavior | Heart rate | Heart rate variability |
Behavioral score | Escape duration (s) | BHR (bpm) | MHR (bpm) | Time to MHR (s) | SDNN (ms) | RMSSD (ms) | LF/HF |
Age | 0.165 | 0.118 | 0.225 | 0.187 | 0.267 | −0.488* | −0.416* | 0.073 |
p < 0.05.
BHR, basal heart rate; bpm, beats per minute; MHR, maximum heart rate; SDNN, standard deviation of the beat-to-beat intervals; ms, milli seconds; RMSSD, root mean square of successive differences; LF/HF, the ratio of low frequency to high frequency components of continuous series of beats (power spectrum).