Autonomic function tests of all patients and by diabetes status
|
All patients (n = 48) |
Non-diabetic (n = 24) |
Diabetic (n = 24) | p Value 3-150 | |
| Clinical tests | ||||
| Valsalva ratio | 1.38 (0.20) | 1.45 (0.20) | 1.311 (0.16) | 0.010 |
| Respiratory variation (beats/min) | 12.0 (6.48) | 13.1 (7.35) | 10.9 (5.42) | NS |
| 30:15 heart rate ratio | 1.12 (0.13) | 1.17 (0.15) | 1.071 (0.081) | 0.007 |
| Supine/standing fall in systolic pressure (mm Hg) | −1.40 (7.19) | −3.13 (6.15) | 0.33 (7.84) | NS |
| Increase in diastolic pressure on handgrip (mm Hg) | 18.1 (6.34) | 20.9 (10.4) | (15.3 (7.88) | 0.042 |
| Heart rate variability | ||||
| LF (In(ms2)) | 5.802 (0.788) | 6.05 (0.810 | 5.55 (0.70) | 0.025 |
| HF (In(ms2)) | 4.446 (0.895) | 4.62 (0.92) | 4.27 (0.85) | NS |
| SDANN (ms) | 109 (32.1) | 116 (36.8) | 102 (25.5) | NS |
| SD (ms) | 49.9 (16.3) | 54.7 (18.1) | 45.1 (12.9) | 0.04 |
| rMSSD (ms) | 26.0 (11.4) | 27.6 (11.3) | 24.5 (11.5) | NS |
| pMN50 (%) | 6.79 (7.67) | 7.57 (7.64) | 6.00 (7.78) | NS |
| SDNN (ms) | 122 (33.5) | 130 (37.8) | 114 (27.0) | NS |
Values are mean (SD).
↵3-150 Diabetic v non-diabetic patients.
HF, high frequency; LF, low frequency; pNN50, proportion of adjacent RR intervals more than 50 ms different; rMSSD, root mean square of difference of successive RR intervals; SD, mean of all five minute standard deviations of RR intervals; SDANN, standard deviation of five minute RR intervals; SDNN, standard deviation of all RR intervals from the mean.