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    • Lower BP Targets...

    Lower BP Targets preserve Cognitive Power in Elderly : JAMA

    Written by Anjali Nimesh Nimesh Published On 2017-09-03T09:00:39+05:30  |  Updated On 3 Sept 2017 9:00 AM IST
    Lower BP Targets preserve Cognitive Power in Elderly : JAMA

    In older hypertensive patients, aged 70 years or older, on treatment, a SPRINT systolic BP level of 120 mm Hg or lower was not associated with worsening cognitive outcome and may be superior to the JNC-8 target for cognition. The greatest decline in cognitive status was observed in persons with systolic blood pressure levels of 150 mm Hg or higher. The study is published online August 21, 2017 in JAMA Neurology.


    The Eighth Joint National Committee (JNC-8) recommended treating systolic blood pressure (SBP) to a target below 150 mm Hg in older adults, whereas data from the Systolic Blood Pressure Intervention Trial (SPRINT) suggested that a SBP level of lower than 120 mm Hg decreases cardiovascular event rates. Target SBP guidelines have not addressed the potential that black patients may have greater morbidity and mortality from hypertension, especially with regard to cognitive outcomes. The association of these discordant SBP targets with cognition and differences by race have not been systematically evaluated in the same population.


    The study was conducted to assess the long-term outcomes of the various recommended SBP levels and to determine if racial differences exist based on long-term cognitive trajectories. Lower targets for systolic blood pressure (SBP) in older individuals appear to preserve cognitive function, with the effect significantly stronger in black patients, new research shows.


    Investigators led by Ihab Hajjar, MD, Emory School of Medicine, Atlanta, Georgia studied a total of 1657 cognitively intact older adults receiving treatment for hypertension were studied from 1997 to 2007 in the Health Aging and Body Composition Study. Data analysis was conducted from October 1, 2016, to January 1, 2017. The analysis of 10-year data from older adults receiving treatment for hypertension in the Health ABC study suggests that lower SBP levels are associated with greater cognitive protection in older black adults with hypertension,"


    Main Outcomes and Measures Cognition was assessed using the Modified Mini-Mental State Examination (3MSE) 4 times and the Digit Symbol Substitution Test (DSST) 5 times. At each visit, participants were classified as having an SBP level of 120 mm Hg or lower, 121 to 139 mm Hg, 140 to 149 mm Hg, or 150 mm Hg or higher based on the mean SBP level of 2 seated readings. Mixed models assessed the association of SBP levels with 10-year cognitive trajectories. The impact of race was tested using a race interaction term.


    lhe researchers found that during the 10-year study period, among the 1657 individuals (908 women and 784 black patients; mean [SE] age, 73.7 [0.1] years), there was a differential decrease in 3MSE and DSST scores by the SBP levels, with the greatest decrease in the group with SBP levels of 150 mm Hg or higher (adjusted decrease was 3.7 for 3MSE and 6.2 for DSST) and the lowest decrease in the group with SBP levels of 120 mm Hg or lower (adjusted decrease was 3.0 for 3MSE and 5.0 for DSST) (P < .001 for both). Compared with white patients, black patients had a greater difference between the higher and lower SBP levels in the decrease in cognition; adjusted differences between the group with SBP levels of 150 mm Hg or higher and the group with SBP levels of 120 mm Hg or lower were –0.05 in white patients and –0.08 in black patients for 3MSE (P = .03) and –0.07 in white patients and –0.13 in black patients for DSST (P = .05).


    It was concluded that for patients 70 years of age or older receiving treatment for hypertension, a SPRINT SBP level of 120 mm Hg or lower was not associated with worsening cognitive outcome and may be superior to the JNC-8 target for cognition. Lower SBP treatment levels may result in improved cognition in black patients.


    Read the full article click on the link : http://jamanetwork.com/journals/jamaneurology/article-abstract/2647695
    Emory School of MedicineHypertensionIhab HajjarJAMAJAMA NeurologyneurologySPRINT SBPsystolic blood pressureSystolic Blood Pressure Intervention Trial

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    Anjali Nimesh Nimesh
    Anjali Nimesh Nimesh
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