A Body Shape Index and Heart Rate Variability in Healthy Indians with Low Body Mass Index

Table 1

Descriptive characteristics of study population.

Subject characteristics	Entire group; ()	Normal BMI group; ()	Low BMI group; ()
Age (Yr)
Weight (Kg)
Height (m)
Waist circumference (m)
BMI (Kg/m^2)
ABSI
Heart rate (bpm)
Low frequency power (LF) (ms^2)	568.6 (192.7–1155.9)	569.1 (196.1–1405.5)	562.6 (178.3–925.5)
High frequency power (HF) (ms^2)	538.4 (175.7–1309.4)	572.8 (146.3–1396.1)	522.8 (220.7–872.1)
Total power (TP) (ms^2)	1843.9 (718.6–3426.9)	2055.9 (685.1–4418.8)	1617.6 (90.3–2935)
Low frequency (nu)	55.2 (38.7–69.0)	59.5 (43.1–74.9)	51.1 (34.7–63.3)
High frequency (nu)	52.9 (40.7–66.2)	49.4 (36.2–63.6)	55.5 (44.9–70.7)
LF nu/HF nu ratio	1.1 (0.6–1.6)	1.2 (0.7–1.9)	0.9 (0.5–1.5)

Grouping based on BMI ranges ≥ 18.5 and < 25 as normal BMI group and BMI < 18.5 as low BMI group.
Data are mean ± standard deviation/median (interquartile range), .