JNC 6 Guideline ( Arch Int Med 1997;157:2413-16 ) Classification of Blood Pressure CategorySBPDBP Optimal < 120or< 80 Normal 120-129 or80-84 High normal 130-139 or 85-89 Stage 1 140-159or 90-99 Stage 2 160-179or100-109 Stage 3 >179 or > 109
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