Cardiovascular Disease Risk Factors in Ghana during the Rural-to-Urban Transition: A Cross-Sectional Study

PLoS One. 2016 Oct 12;11(10):e0162753. doi: 10.1371/journal.pone.0162753. eCollection 2016.

Abstract

Populations in sub-Saharan Africa are shifting from rural to increasingly urban. Although the burden of cardiovascular disease is expected to increase with this changing landscape, few large studies have assessed a wide range of risk factors in urban and rural populations, particularly in West Africa. We conducted a cross-sectional, population-based survey of 3317 participants from Ghana (≥18 years old), of whom 2265 (57% female) were from a mid-sized city (Sunyani, population ~250,000) and 1052 (55% female) were from surrounding villages (populations <5000). We measured canonical cardiovascular disease risk factors (BMI, blood pressure, fasting glucose, lipids) and fibrinolytic markers (PAI-1 and t-PA), and assessed how their distributions and related clinical outcomes (including obesity, hypertension and diabetes) varied with urban residence and sex. Urban residence was strongly associated with obesity (OR: 7.8, 95% CI: 5.3-11.3), diabetes (OR 3.6, 95% CI: 2.3-5.7), and hypertension (OR 3.2, 95% CI: 2.6-4.0). Among the quantitative measures, most affected were total cholesterol (+0.81 standard deviations, 95% CI 0.73-0.88), LDL cholesterol (+0.89, 95% CI: 0.79-0.99), and t-PA (+0.56, 95% CI: 0.48-0.63). Triglycerides and HDL cholesterol profiles were similarly poor in both urban and rural environments, but significantly worse among rural participants after BMI-adjustment. For most of the risk factors, the strength of the association with urban residence did not vary with sex. Obesity was a major exception, with urban women at particularly high risk (26% age-standardized prevalence) compared to urban men (7%). Overall, urban residents had substantially worse cardiovascular risk profiles, with some risk factors at levels typically seen in the developed world.

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Aged, 80 and over
  • Blood Glucose / analysis
  • Blood Pressure
  • Body Mass Index
  • Cardiovascular Diseases / epidemiology
  • Cardiovascular Diseases / etiology*
  • Cholesterol / blood
  • Cholesterol, HDL / blood
  • Cholesterol, LDL / blood
  • Cross-Sectional Studies
  • Diabetes Mellitus, Type 2 / complications
  • Diabetes Mellitus, Type 2 / epidemiology
  • Female
  • Ghana / epidemiology
  • Humans
  • Hypertension / complications
  • Hypertension / epidemiology
  • Male
  • Middle Aged
  • Obesity / complications
  • Obesity / epidemiology
  • Plasminogen Activator Inhibitor 1 / blood
  • Prevalence
  • Risk Factors
  • Smoking
  • Surveys and Questionnaires
  • Tissue Plasminogen Activator / blood
  • Triglycerides / blood
  • Urbanization*
  • Young Adult

Substances

  • Blood Glucose
  • Cholesterol, HDL
  • Cholesterol, LDL
  • Plasminogen Activator Inhibitor 1
  • Triglycerides
  • Cholesterol
  • Tissue Plasminogen Activator