Prevention & lipids

Cardiovascular Health of Middle-Aged U.S. Adults by Income Level, 1999 to March 2020 : A Serial Cross-Sectional Study

Ann Intern MedPublished Serial cross-sectional study

Authors' conclusion

Over 2 decades in the United States, hypertension increased in low-income middle-aged adults, whereas diabetes and obesity increased in their higher-income counterparts. Income-based disparities in hypertension, diabetes, and smoking persisted even after adjustment for other social determinants of health.

Study context

Population
US adults aged 40 to 64 years, NHANES, 1999 to March 2020
Participants
20,761 adults
Exposure
Low-income vs higher-income middle-aged adults
Outcome
Age-standardised prevalence of hypertension, diabetes, hyperlipidemia, obesity and cigarette use; treatment rates for hypertension, diabetes and hyperlipidemia; BP, glycemic and cholesterol control rates
Follow-up
1999 to March 2020
Methodological detailsSample size limitations could preclude detection of small changes in treatment and control rates
  • Sample size limitations could preclude detection of small changes in treatment and control rates

Main finding

As reported in the abstract

Trends in CV risk factors by income, 1999 to March 2020
GroupHypertensionCigarette useDiabetesObesity
Low-income37.2% (95% CI 33.5% to 40.9%) to 44.7% (CI 39.8% to 49.5%)33.2% (CI 28.4% to 38.0%) to 33.9% (CI 29.6% to 38.3%)
Higher-income18.6% (CI 13.5% to 23.7%) to 11.5% (CI 8.7% to 14.3%)7.8% (CI 5.0% to 10.6%) to 14.9% (CI 12.4% to 17.3%)33.0% (CI 26.7% to 39.4%) to 44.0% (CI 40.2% to 47.7%)

Hypertension

Low-income37.2% (95% CI 33.5% to 40.9%) to 44.7% (CI 39.8% to 49.5%)
Higher-income— not stated in the abstract

Cigarette use

Low-income33.2% (CI 28.4% to 38.0%) to 33.9% (CI 29.6% to 38.3%)
Higher-income18.6% (CI 13.5% to 23.7%) to 11.5% (CI 8.7% to 14.3%)

Diabetes

Low-income— not stated in the abstract
Higher-income7.8% (CI 5.0% to 10.6%) to 14.9% (CI 12.4% to 17.3%)

Obesity

Low-income— not stated in the abstract
Higher-income33.0% (CI 26.7% to 39.4%) to 44.0% (CI 40.2% to 47.7%)

Observational data: associations, not effects.

Further findings

OutcomeHigher-income
Diabetes treatment rates
Diabetes treatment58.4% (CI 44.4% to 72.5%) to 77.4% (CI 67.6% to 87.1%)

Hypertension treatment and control

Unchanged in both groups
>80%

Diabetes treatment rates

Improved only among the higher-income group

Income-based disparities after adjustment for insurance, health care access and food insecurity · more recent years

Disparities in hypertension, diabetes and cigarette use persisted

Original publication

Cardiovascular Health of Middle-Aged U.S. Adults by Income Level, 1999 to March 2020 : A Serial Cross-Sectional Study. Ann Intern Med. Published 21 November 2023. doi:10.7326/m23-2109

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