Within-visit blood pressure variability: relevant factors in the general population
2013
JH Shin, J Shin, BK Kim, Y-H Lim, H-C Park, SI Choi, SG Kim and JH KimThe objective of this study was to use a nationwide epidemiological survey to investigate the factors that affect within-visit bloodpressure (BP) variability. We analyzed the Korean National Health and Nutrition Examination Survey (KNHNES) data for 2005(n¼5488). We examined three within-visit BP variability parameters that include the following: the alarm reaction (AR), defined asthe first BP reading minus the third BP reading; the BP discrepancy, defined as the maximal BP reading minus the minimal BPreading (DBPmax); and the s.d. (BPSD). Age, fasting glucose, eGFR, total cholesterol, LDL cholesterol, and the metabolic syndrome(MetS) score were the relevant factors that affected the systolic AR, DSBPmax and SBPSD. Multiple linear regression modelsrevealed that age (Po0.0001), the office systolic BP (SBP) level (Po0.0001), the MetS score (Po0.0001), the female gender(P¼0.007) and the eGFR (P¼0.049) were independently associated with the systolic AR, whereas age (Po0.0001), the office SBPlevel (Po0.0001), and the female gender (P¼0.024 and 0.022) were independently associated with DSBPmax and SBPSD,respectively. Within-visit BP variability, especially the variability associated with the SBP, was significantly associated with increasedage, female gender and cardiovascular risk factors, such as hypertension, low eGFR and adverse glucose and lipid profiles. Inaddition, increased age, female gender, the eGFR and the MetS score were independently relevant factors that affected the systolicAR. Systolic within-visit BP variability and systolic AR are associated with cardiovascular risk factors.Journal of Human Hypertension (2013) 27, 328–334; doi:10.1038/jhh.2012.39; published online 13 September 2012Keywords: blood pressure; epidemiologic survey; variabilityINTRODUCTIONCasual blood pressure (BP) measurements based on multipleclinical readings are generally used to make clinical decisionsand determine prognoses.
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