Diabetic Driving StudiesdPart 2: A Comparison of Brake ResponseTime Between Drivers With Diabetes With and Without LowerExtremity Sensorimotor Neuropathy

We have previously demonstrated an abnormally delayed mean brake response time and an increased fre-quency of abnormally delayed brake responses in a group of neuropathic drivers with diabetes compared witha control group of drivers with neither diabetes nor lower extremity neuropathy. The objective of the presentcase-control study was to compare the mean brake response time between 2 groups of drivers with diabeteswith and without lower extremity sensorimotor neuropathy. The braking performances of the participantswere evaluated using a computerized driving simulator with specific measurement of the mean brakeresponse time and the frequency of the abnormally delayed brake responses. We compared a control group of25 active drivers with type 2 diabetes without lower extremity neuropathy and an experimental group of 25active drivers with type 2 diabetes and lower extremity neuropathy from an urban U.S. podiatric medicalclinic. The experimental group demonstrated an 11.49% slower mean brake response time (0.7570.180versus 0.6790.120 second;p<.001), with abnormally delayed reactions occurring at a greater frequency(57.5% versus 35.0%;p<.001). Independent of a comparative statistical analysis, diabetic drivers with neu-ropathy demonstrated a mean brake response time slower than a suggested safety threshold of 0.70 second,and diabetic drivers without neuropathy demonstrated a mean brake response time faster than this threshold.The results of the present investigation provide evidence that the specific onset of lower extremity sensori-motor neuropathy associated with diabetes appears to impart a negative effect on automobile brake responses...

Download Full Article