Table I. Characteristics of young and older cohort
Young (n = 50)Older (n = 54) p Valuea
Age (y), mean (range)24.8 (2130)75.4 (64–87)<0.0001
Female gender, no. (%) 35 (70)22 (40.7)0.006
Race, no. (%)
 White35 (70)48 (88)<0.0001
 Black5 (10)2 (3.7)0.49
 Asian10 (20)2 (3.7)0.003
 Hispanic04 (7.4)0.006
Body mass index24.426.40.09
No. of comorbidities0.231.24<0.0001
No reported comorbidities, no. (%)49 (98)43 (79.6)0.009
Specific comorbidities, no. (%)
  Stroke0 (0)3 (5.5)0.12
  Heart diseaseb 0 (0)9 (16.6)<0.0001
  Peripheral vascular0 (0)2 (3.7)0.49
   disease
  Lung disease0 (0)2 (3.7)0.49
  Peptic ulcer disease1 (2)5 (10)0.12
  • a Based on t tests for normally distributed characteristics and Fisher exact tests for categorical characteristics.

  • b Includes coronary artery disease, congestive heart failure, and arrhythmias.