Indicator Details: Percentage of Patients with a Diagnosis of Hypertension by Age
Data Sources
 
Stratification and Year Choices:

  Source
  • NATIONAL VA

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The fraction of patients meeting our definition of hypertension increases with age from 7-8% for ages 20-29, 17-21% for ages 30-39, 35-39% for ages 40-49, 55-62% for ages 50-59, 67-74% for ages 60-69 and 73-81% for ages 70+.
Chart Explanation: The percentage of patients with hypertension by year is displayed. The percentage of patients with hypertension increased with increasing age.
The Veteran’s Affairs (VA) data presented are from a national sample of health care visits to the VA Health System by eligible U. S. veterans. During any given year, ~ 70% of the outpatient population receives a serum creatinine test. While the demographics of VA Health System users are distinct from the general U.S. population, the VA data allow a ‘snapshot’ of clinical practices across the nation.

National VA data were examined. Within each VISN (Veterans Integrated Service Network), a 5% random sample of patients was extracted from the national VA data repository each fiscal year (FY) from FY2005 to FY2009. Starting in FY2010 and continuing in future years, analyses were performed on the entire patient population (100% sample).

This material is the result of work supported with resources and the use of facilities at the Veterans Affairs Ann Arbor Healthcare System, Ann Arbor, Michigan.
FieldData
Description of MeasureHypertension as a risk factor for CKD
Data SourceVA
Type of Data SourceAdministrative
Data SetVA National 5% Sample (FY05-FY09) and 100% (FY10-present)
Health Care System DataYes
Regional or National?National
Demographic GroupPatients in VA health system
NumeratorPatients in denominator with diagnosis of hypertension or who are on medication for blood pressure control.
DenominatorPatients >20 years old and who had at least 1 outpatient visit in the fiscal year.
Definition of hypertensionHypertension status determined by ICD-9-CM code (401, 402, 403, 404, 405 ) and/or prescribed antihypertensive medication (outpatient only).
Primary Data Source IndicatorICD-9-CM code for hypertension
Primary Indicator Method of MeasurementMedical record
Secondary (1) VariableAge = (Date of Visit - Date of Birth)/365.25
Secondary (1) Indicator Method of MeasurementOutpatient Visit
Frequency of Measurement (Primary)Multiple measurements per patient
U.S. Region Covered by Primary VariableAll
Period Currently Available2005–2012
Limitations of IndicatorPrevalence estimation limited by health care system testing and patient utilization of health care resources.
Analytical ConsiderationsCoding of medications in the VA system changed in 2009, differences in prevalence calculations may not be due to true changes in underlying population.
Suggested Citation:
Centers for Disease Control and Prevention. Chronic Kidney Disease Surveillance System—United States.
website. http://www.cdc.gov/ckd