Original Article Trends in the Prevalence, Awareness, Treatment, and Control of Hypertension Among Young Adults in the United States, 1999 to 2014 Yiyi Zhang, Andrew E. Moran

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Abstract—Overall hypertension prevalence has not changed in the United States in recent decades although awareness, treatment, and control improved. However, hypertension epidemiology and its temporal trends may differ in younger adults compared with older adults. Our study included 41 331 participants ≥18 years of age from 8 National Health and Nutrition Examination Surveys (1999–2014) and estimated temporal trends of hypertension, awareness, treatment, and control among young adults (age, 18–39 years) compared with middle-age (age, 40–59 years) and older adults (age, ≥60 years). In 2013 to 2014, 7.3% of the US young adults had hypertension. During 1999 to 2014, young adults saw larger increases in hypertension awareness, treatment, and control than did older adults. However, all of these components of hypertension control were lower among young adults compared with middle-aged or older adults (74.7% younger versus 81.9% middle versus 88.4% older for awareness; 50.0% versus 70.3% versus 83.0% for treatment; and 40.2% versus 56.7% versus 54.4% for control). Worse hypertension awareness, treatment, and control in young adults overall were mostly driven by worse measures in young adult men compared with young adult women. More frequent healthcare visits by young adult women explained ≈28% of the sex-related difference in awareness, 60% of the difference in treatment, and 52% of the difference in control. These findings suggest that improved access to and engagement in medical care might improve hypertension control in young adults, particularly young adult men, and reduce life-time cardiovascular risk.  (Hypertension. 2017;70:00-00. DOI: 10.1161/HYPERTENSIONAHA.117.09801.) Online Data Supplement



Key Words: blood pressure



body mass index



cardiovascular diseases

H



hypertension



young adult

risk factor for stroke, and ≈10% of all strokes occur in individuals 18 to 50 years of age.13–15 In contrast to the decline in overall age-adjusted rates of stroke mortality and hospitalization in the past 2 decades, hospitalization for acute ischemic stroke increased significantly among young adults 10% since 2010, representing an increase of ≈6.1 million young adults with access to a regular source of medical care, and potentially, prevention programs.36 In our analysis, health insurance coverage alone

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did not explain low hypertension awareness, treatment, or control in young adult men, suggesting that low preventive services uptake may be more important than insurance status in this group. For young adult men without access to care or infrequent preventive care visits, hypertension awareness, treatment, and control may only be improved outside of traditional clinical settings. School or worksite-based health screening may reach young adults more successfully.37 Young men may respond more favorably and link to primary care if blood pressure screening is performed by trained and trusted laypeople, like barbers.38 Future studies are needed to assess the effectiveness of these strategies in improving awareness and control of hypertension among young adult men. A few limitations of this study need to be considered. Blood pressure was measured during a single visit and may result in misclassification of some of the participants. Hypertension awareness, medication use, insurance coverage, and number of healthcare visits were based on self-report and potentially subject to recall bias. Although we assessed health insurance status, we were not able to assess the quality of preventive services covered by participants’ insurance plans. In addition, our study only evaluated medication use for blood pressure control. Lifestyle modifications, such as low sodium intake or physical activity, were not examined in the present analysis. Although our study included a large sample size, the number of young adults who had hypertension was relatively small in each survey cycle. Therefore, hypertension awareness, treatment, and control could not be reliably estimated by race/ethnicity for some of the survey cycles. The strength of our study includes the use of nationally representative data, the rigorous study protocol, and quality-control procedures of NHANES. The large sample size and 16 years of data also allowed us to estimate age-specific trends with high precision.

Perspectives The prevalence of hypertension remained unchanged from 1999 to 2014 among US young adults, along with improvements in hypertension awareness, treatment, and control. However, despite this progress, young adults lag behind older adults in hypertension awareness, treatment, and control. Worse hypertension awareness and management among young adults appeared to be mostly driven by deficits in young adult men, not by women, which may be explained, in part, by limited healthcare access or less frequent medical care use in young adult men. These findings highlight important gaps in today’s approach to blood pressure control and primary prevention of cardiovascular disease, as well as potential opportunities for reducing future burden of cardiovascular disease and advancing cardiovascular health in the coming decades as today’s young adults transition into middle and late adulthood. Further research is needed to better understand and address age and sex gaps in hypertension awareness and control and quantify the expected future benefits of controlling blood pressure in today’s young adults.

Sources of Funding This work was supported by National Institutes of Health R01 HL130500 (A.E. Moran).

Disclosures None.

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Novelty and Significance What Is New?

Summary

• Hypertension awareness, treatment, and control improved in US young

There remain important quality gaps in today’s approach to blood pressure control in young adults. Public health efforts to improve blood pressure control among young adults, particularly men, should focus on raising awareness and improving outreach in medical, worksite, and community settings.

adults in the past 15 years but remained substantially lower compared with middle-aged and older adults. • Young adult men had worse hypertension awareness, treatment, and control compared with young adult women.

What Is Relevant?

• In 2013 to 2014, 6.7 million US young adults had hypertension, of whom only 50% were treated and 40% controlled.

Trends in the Prevalence, Awareness, Treatment, and Control of Hypertension Among Young Adults in the United States, 1999 to 2014 Yiyi Zhang and Andrew E. Moran Downloaded from http://hyper.ahajournals.org/ by guest on August 30, 2017

Hypertension. published online August 28, 2017; Hypertension is published by the American Heart Association, 7272 Greenville Avenue, Dallas, TX 75231 Copyright © 2017 American Heart Association, Inc. All rights reserved. Print ISSN: 0194-911X. Online ISSN: 1524-4563

The online version of this article, along with updated information and services, is located on the World Wide Web at: http://hyper.ahajournals.org/content/early/2017/08/28/HYPERTENSIONAHA.117.09801

Data Supplement (unedited) at: http://hyper.ahajournals.org/content/suppl/2017/08/25/HYPERTENSIONAHA.117.09801.DC1

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Trends in the Prevalence, Awareness, Treatment, and Control of Hypertension among Young Adults in the United States, 1999-2014

Yiyi Zhang, PhD,1 Andrew E Moran, MD, MPH1

1

Division of General Medicine, Columbia University, New York, NY

Correspondence: Andrew E. Moran, MD, MPH, Columbia University Division of General Medicine, Presbyterian Hospital, 9th Fl. East, Rm. 105, 622 West 168th St., New York, NY 10032, Tel: 212-305-2569, Email: [email protected]

Brief title: Trends in hypertension among U.S. young adults

Word count (abstract): 232 Word count (text): 3,076 Total number of figures: 4

1

Table S1. Age-standardized weighted prevalence (standard error) of hypertension, and awareness, treatment, and control of hypertension per 100 adults in the US general population Overall Age groups

Total N

Cases

By NHANES survey cycle 19992000 (n = 4,487)

20012002 (n = 4,945)

20032004 (n = 4,668)

20052006 (n = 4,693)

20072008 (n = 5,615)

20092010 (n = 5,988)

20112012 (n = 5,294)

20132014 (n = 5,641)

P-trend

Hypertension All Age (years) 18-39 40-59 ≥60 P-value

41,331 14,229

28.7 (1.4)

28.0 (0.9)

29.7 (1.1)

29.0 (1.0)

29.6 (0.7)

28.5 (0.9)

28.7 (0.7)

29.4 (0.9)

15,669 12,490 13,172

7.6 (1.6) 30.2 (2.0) 66.1 (1.9)

Trends in the Prevalence, Awareness, Treatment, and Control of Hypertension Among Young Adults in the United States, 1999 to 2014.

Overall hypertension prevalence has not changed in the United States in recent decades although awareness, treatment, and control improved. However, h...
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