Prevalence, determinants, and clinical significance of masked hypertension and white-coat hypertension in patients with chronic kidney disease.

Background: Masked hypertension and white-coat hypertension have been studied among the general population and in hypertensive patients. However, little insight is available on masked and white-coat hypertension among patients with chronic kidney disease (CKD).

Methods: We recruited 1322 CKD patients admitted to our hospital division. Patients were divided into four groups: normotension; white-coat hypertension (WCHT); masked hypertension (MHT); sustained hypertension. Multivariable logistic regression analyses were used to evaluate the correlation between WCHT, MHT and renal/cardiovascular parameters.

Results: The prevalence of WCHT and MHT was 10.21% and 16.11%, respectively. Patients with WCHT and MHT had more severe target-organ damage (TOD) than patients with normotension, but had less severe TOD than patients with sustained hypertension. MHT correlated with impaired renal function and left-ventricular hypertrophy, whereas WCHT was associated with abnormal carotid intima media thickness. Age, body mass index, clinic and 24-h systolic blood pressure correlated with MHT, whereas clinic, 24-h diastolic blood pressure and night-time systolic blood pressure was associated with WCHT.

Conclusions: Prevalence of WCHT and MHT was 10.21% and 16.11%, respectively. WCHT and MHT show a close relationship with TOD in CKD patients.