Results: There were no significant differences in aggregate achievement of clinical targets aged 50 to 65 years (US marketbased
vs. NHS- 62.3% vs. 61.3% [p = 0.835]). There was, however, greater control in the US in patients aged 65 years and over
(US Medicare vs. NHS- 53.5% vs. 58.2% [p = 0.043]). England had no significant socioeconomic disparity in blood pressure
control (60.9% vs. 63.5% [p = 0.588], high and low wealth aged $65 years). The US had socioeconomic differences in the 50–
64 years group (71.7% vs. 55.2% [p = 0.003], high and low wealth); these were attenuated but not abolished in Medicare
beneficiaries.