Table 1.

Pre-study parameters of participants with and without a history of driving mishaps

Variables	−HX	+Hx	p
N	22	16
Age	42 ±12.9	42 ±12.8	ns
% Female	34%	62%	ns
Education/yrs	15 ±2.6	16 ±2.2	ns
HbA1c	7.1 ±0.8	7.5 ±0.9	ns
Yrs. with diabetes	21 ±9.4	21 ±10.8	ns
Insulin Units/day	42 ±15.5	42 ±32.3	ns
BMI	27 ±5.2	26 ±4.2	Ns
%Hypoglycemia Unawareness (N)	82% (18)	75% (12)	ns
Severe hypoglycemia in past 12 month	0.5 ±0.7	1.6 ±2.2	<.03
% Subjective neuropathy (N)	23% (5)	44% (7)	ns
% Objective Neuropathy (N)	9% (2)	19% (3)	ns
% Retinopathy (N)	41% (9)	25% (4)	ns
% Laser eye therapy (N)	4% (1)	12% (2)	ns
Years Driving experience	27	27	ns
Miles driven/yr	18.5714 ±12.040	17.7308 ±16.133	ns
SMBG before driving*	1	1.7	ns
Fast acting sugar in car*	2	2.9	ns
# Mild hypo while driving in past 6 months	0.7	1.1	ns
# Driving mishaps in past year	0	2.8	.0001
Hypoglycemic nadir (clamp)	2.74±.89 mmol/l	2.64 ±.28 mmol/l	ns
Peak epinephrine during hypoglycemia (clamp)	1883.01+ pmol/l	1184.38 pmol/l	=.05

^*Mean ratings on 0 (Never) to 4 (Always) scales