Skip to main content

Table 2 Distributions of 5-min heart rate variability (HRV) and heart rate (HR) during the study

From: Effect of short-term exposure to particulate air pollution on heart rate variability in normal-weight and obese adults

HRV indices

All

Normal-weight (n = 53)

Obese (n = 44)

Na

Mean ± SD

Na

Mean ± SD

Na

Mean ± SD

SDNN, ms

40,312

70.4 ± 30.7

20,544

69.2 ± 31.4

19,768

71.3 ± 31.5

Total power, ms2

40,312

4807.8 ± 5121.4

20,544

4670.5 ± 5063.1

19,768

4990.9 ± 5447.6

HF, ms2

40,312

579.1 ± 669.9

20,544

655.1 ± 776.8

19,768

594.0 ± 641.3

LF, ms2

40,312

980.3 ± 742.8

20,544

979.3 ± 770.9

19,768

968.9 ± 753.4

LF/HF

40,312

3.5 ± 3.4

20,544

3.5 ± 3.5

19,768

3.2 ± 3.1

HR, bpm

40,312

73.4 ± 14.9

20,544

74.4 ± 16.0

19,768

70.8 ± 15.2

  1. Abbreviations: SDNN standard deviation of all normal-to-normal (NN) intervals, HF high frequency power, LF low frequency power, LF/HF ratio of low–high frequency power, bmp beats per minute, SD standard deviation
  2. a Observation after removing for missing values and outliers