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. 2007 May 31;3(5):296–301. doi: 10.1111/j.1524-6175.2001.00491.x

Figure 1.

Figure 1

Relationship between severity of breathing disorders in sleep, as indicated by the respiratory disturbance index (RDI)—the total number of apneic plus hypopneic events divided by the total sleep time in hours—and self‐reported hypertension. Data of 10,000 patients diagnosed in the Technion Sleep Medicine Center in Israel during 1990–2000 are presented.