Table 2.
Heart rate variability parameters of the children in the lower and higher vitamin B12 status groups
| Parameters | Lower vitamin B12 status group (n = 40) | Higher vitamin B12 status group (n = 39) |
|---|---|---|
| Low‐frequency power (LF) (0.04–0.15 Hz) (m s2) | 646.3 (287.1–1098.9) | 989.3* (532.5–1519.7) |
| High‐frequency power (HF) (0.15–0.4 Hz) (m s2) | 509.0 (230.1–1086.9) | 865.9 (353.2–1969.4) |
| Total power (0–0.4 Hz) (m s2) | 1554.5 (719.9–2942.2) | 2240.4 (1202.3–3959.8) |
| Normalised LF | 57.6 (45.5–68.6) | 57.1 (42.3–66.9) |
| Normalised HF | 48.4 (41.5–60.0) | 50.3 (41.9–62.7) |
| Ratio LF/HF | 1.23 (0.76–1.65) | 1.15 (0.67–1.68) |
| Heart rate (bpm) | 98.8 (89.6–105.3) | 94.4 (87.6–102.7) |
LF, low frequency; HF, high frequency; bpm, beats per minute. Data are median (interquartile range). *P < 0.05 compared with lower vitamin B12 status group.