Table 1.

Characteristics of healthy younger and older adult controls

Healthy youngerFrail/prefrail olderP
Mean ± SDn = 25n = 25
Age, y35 ± 578.0 ± 8.4<.001
% Male43.4827.27
BMI, kg/m225.82 ± 6.0726.46 ± 5.77.671
Hemoglobin, g/dL14.46 ± 1.4213.04 ± 1.97.004
Platelets, × 109/L245.71 ± 38.03250.64 ± 72.83.792
WBC, × 109/L5.35 ± 0.587.64 ± 1.59<.001
INR1.03 ± 0.081.45 ± 0.44<.001
Prothrombin time, s13.42 ± 0.5816.07 ± 2.79<.001
Aspirin use, %8.6963.64
Statin use, %072.73
Clopidogrel use, %04.54
Warfarin use, %018.18
  • BMI, body mass index; INR, international normalized ratio; SD, standard deviation; WBC, white blood cell.