The homeostasis model assessment (HOMA) has been extensively used as a reliable surrogate marker for measuring insulin resistance in patients with diabetes mellitus and in normal subjects. Comparative data in another insulin resistance state, hypertension, is lacking. The goal of the present study was to obtain that information by testing the correlation of HOMA with the euglycemic hyperinsulinemic clamp in 36 hypertensive and 27 normotensive subjects. Clamp-derived insulin sensitivity was calculated as the glucose disposal rate over steady-state plasma insulin concentration. Homeostasis model assessment was computed using the formula (fasting glucose x fasting insulin)/22.5. There was significant correlation between the clamp and HOMA for both the hypertensive (r = -0.64, P < .0001) and normotensive subjects (r = -0.58, P = .002). The HOMA can be used reliably as a less expensive and less cumbersome alternative for measuring insulin resistance in hypertension.