To investigate the interaction of hypertension and total plasma homocysteine (tHcy) levels on risk of all-cause and cardiovascular disease (CVD) mortality among middle-aged and older population.

中文翻译：

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高血压和同型半胱氨酸的相互作用增加了美国中老年人群的死亡风险。

研究高血压和血浆总同型半胱氨酸（tHcy）水平对中老年人群全因和心血管疾病（CVD）死亡率风险的相互作用。