Abstract:
OBJECTIVE:To investigate whether red blood cell distribution width (RDW) is associated with the blood pressure (BP) reverse-dipper pattern in patients with hypertension. DESIGN:Cross-sectional study. SETTING:Single centre. PARTICIPANTS:Patients with essential hypertension were included in our study (n=708). The exclusion criteria included age <18 or >90 years, incomplete clinical data, night workers, diagnosis of secondary hypertension, under antihypertensive treatment, intolerance for the 24 h ambulatory BP monitoring (ABPM) and BP reading success rate <70%. MEASUREMENT:Physical examination and ABPM were performed for all patients in our study. The value of RDW was measured using an automated haematology analyser. STATISTICAL METHODS:The distribution of RDW in patients with hypertension among different circadian BP pattern groups was analyzed using analysis of variance (ANOVA). Multinomial logistic regression was applied to explore the associations of RDW and other relevant variables with ABPM results. RESULTS:There was significantly increased RDW in reverse dippers (13.52 ± 1.05) than dippers (13.25 ± 0.85) of hypertension (p=0.012). Moreover, multinomial logistic regression analysis showed that RDW (OR 1.325, 95% CI 1.037 to 1.692, p=0.024) and diabetes mellitus (OR 2.286, 95% CI 1.380 to 3.788, p=0.001) were significantly different when comparing the reverse-dipper BP pattern with the dipper pattern. However, there was no difference of RDW between the non-dipper pattern and the reverse-dipper pattern (OR 1.036, 95% CI 0.867 to 1.238, p=0.693). In addition to this, RDW was negatively correlated with the decline rate of nocturnal systolic BP (r=-0.113; p=0.003) and diastolic BP (r=-0.101; p=0.007). CONCLUSIONS:Our results suggested that RDW might associate with the abnormal dipper BP patterns of either reverse dipping or non-dipping homogeneously examined with 24 h ABPM.
journal_name
BMJ Openjournal_title
BMJ openauthors
Su D,Guo Q,Gao Y,Han J,Yan B,Peng L,Song A,Zhou F,Wang Gdoi
10.1136/bmjopen-2015-010456subject
Has Abstractpub_date
2016-02-23 00:00:00pages
e010456issue
2issn
2044-6055pii
bmjopen-2015-010456journal_volume
6pub_type
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