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Table 1 HRV parameters for subjects with diabetes in this study, and for healthy, younger, non-diabetic subjects tested under similar conditions*

From: Inhalation of ultrafine carbon particles alters heart rate and heart rate variability in people with type 2 diabetes

  Current subjects Non-diabetic subjects
N = 17 N = 23
Age 45.9 (9.5) yr Age 28.5 (7.5) yr
NN (ms) 907 (143) 914 (149)
SDNN (ms) 38 (18) 66 (41)
rMSSD (ms) 33 (23) 65 (57)
HF (ms2) 555 (913) 2380 (4222)
LF (ms2) 436 (533) 1580 (2159)
LF/HF 2.9 (5.5) 2.0 (2.2)
HF (nu) 44 (27) 44 (22)
LF (nu) 43 (22) 49 (21)
  1. *5 min recordings supine at rest prior to air exposure. Non-diabetic data from subjects in our prior studies [[35]]. Means (SD).