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Figure 2 Dose-response relationship between the severity of obstructive sleep apnea based on apnea-hypopnea index and the adjusted odds ratio of hypertension, defined as blood pressure >140/90 mm Hg or current treatment with antihypertensive medications. Odds ratio was adjusted for baseline hypertension status, age, gender, habitus, and weekly alcohol and cigarette use. p = 0.002 for linear trend of the logistic regression coefficients. Data from Peppard et al. (25).