Perioperative Blood Pressures and Chronic Hypertension

Study Overview
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Brief Summary
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This study aims to assess the performance of presurgical clinic blood pressure measurements in predicting home blood pressure readings among surgical patients. It also aims to measure the association between home blood pressures and patient perspectives on blood pressure control.

Detailed Description
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A convenience sample of presurgical patients seen in a preadmission testing clinic were enrolled and sent home with a home blood pressure monitor that stored up to 50 readings. Participants were asked to return the BP cuff on the day of their surgery.

Official Title
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The Association Between Home Blood Pressures and Clinic Blood Pressures in Patients Presenting for Surgery.

Conditions
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Hypertension

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Ambulatory patients >= 21 years of age presenting for surgery to a tertiary care preadmission testing clinic. Exclusion Criteria: Inability or unwillingness to independently operate a home blood pressure monitor.

Ages Eligible for Study
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Minimum Age: 21 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Performance of Blood Pressure Referral Threshold | The positive predictive value of preadmission testing-measured blood pressure to predict mean home blood pressure >135/85mmHg will be calculated. | Subjects followed for approximately 1 year | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Patient Perspectives and Beliefs Regarding Blood Pressure Status as They Relate to Actual Home Blood Pressures. | In secondary analyses, the agreement between patients' self-reported blood pressure control (binary outcome) and home blood pressure monitor-determined blood pressure status (binary outcome) will we assessed via Cohen's kappa and raw indices of agreement. | Approximately 60 days | 
| Preidentified Subgroups | The investigators will examine the correlation between blood pressure and heart rate in the subset of patients with hypertension diagnosis. | 1 year | 
| Patient Perspectives | The possible association of self-reported availability of primary care (5 point LIKERT scale) with home blood pressure monitor-status will be examined by the Mantel-Haenszel Chi-Square Test. | 60 days | 
| Patient Adherence | The possible association of medication adherence (Morisky scale) with home blood pressure monitor-status will be examined by the Mantel-Haenszel Chi-Square Test. | 60 days | 
| Preidentified Subgroup Analysis | The investigators will examine the correlation between blood pressure and heart rate in the subset of patients without hypertension diagnosis. | 1 year | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Hypertension, Perioperative Care