Autonomic dysfunction and circadian blood pressure variations in people with impaired glucose tolerance.

Aims: To assess circadian blood pressure variability in people with impaired glucose tolerance and a healthy control population.

Methods: Seventy-five people with impaired glucose tolerance and 40 healthy volunteers (frequency matched on 10-year age bands and sex) underwent a detailed neurological assessment. Autonomic neuropathy was detected by the five standard cardiovascular autonomic tests and heart rate variability was characterized by the triangle index.