A nationally representative analysis of the 2017–2018 Bangladesh Demographic and Health Survey (BDHS), conducted with support from icddr,b, reveals a striking reversal: women in Bangladesh begin to overtake men in hypertension prevalence from their early thirties onwards, and the gap widens with age.

What appears at first to be a routine epidemiological study instead exposes a deeper public health paradox, where gender, biology, and social structure intersect in unexpected ways.

A population-level shift hidden in plain sight

The study analysed 12,476 adults aged 18 and above using the Bangladesh Demographic and Health Survey (BDHS) 2017–2018. Blood pressure was measured using standardised protocols, and hypertension was defined according to WHO-aligned cut-offs (≥140/90 mmHg or use of antihypertensive medication).

At the national level, 28% of Bangladeshi adults were hypertensive. But beneath this average lies a more unsettling pattern.

• In early adulthood (18–24 years), men show higher or comparable hypertension levels.
• By the early thirties, women begin to overtake men.
• After age 35, women consistently show significantly higher prevalence.
• In older age groups, the gap becomes pronounced and persistent.

By age 60+, more than half of all adults are hypertensive, with women carrying a disproportionate burden.

This is not a small deviation. It is a structural reversal of the expected sex-based risk curve.

Age 25–39 as a turning point

One of the most critical findings is not just that women become more hypertensive, but when.

The transition begins subtly in the mid-twenties and becomes statistically clear by the early thirties. By 35–39 years, women have significantly higher adjusted odds of hypertension compared to men (AOR 3.6; 95% CI 1.9–6.6 when interaction effects are considered).

This is the point where biological risk alone cannot explain the pattern.

Instead, the curve reflects a convergence of reproductive health pressures, behavioural change, and structural constraints that begin to accumulate early in adult life.

Beyond biology: Why women are paying the higher price

The study does not attribute the pattern to a single cause. Instead, it points to multiple overlapping pathways that gradually intensify risk for women.

One major driver is metabolic change. Rising body mass index (BMI) among Bangladeshi women, especially in their twenties and thirties, is strongly associated with hypertension. Overweight and obesity nearly double hypertension prevalence compared to normal BMI categories.

Reproductive health also plays a role. Early marriage, high fertility rates, and pregnancy-related weight retention contribute to long-term cardiovascular strain. Pregnancy-induced hypertension and pre-eclampsia may further elevate risk later in life.

Contraceptive use adds another layer. Combined oral contraceptive pills, widely used in Bangladesh, have been associated in several studies with temporary or sustained increases in blood pressure.

Stress, activity and environment

The biological explanation alone is insufficient. The social environment appears equally influential.

Women in Bangladesh report higher levels of psychological distress, including anxiety and depression, which are known to influence cardiovascular regulation through sympathetic nervous system activation.

Physical activity patterns also diverge sharply by gender. Men are more likely to engage in occupational or transport-related physical activity, while women’s activity is largely domestic and often below recommended intensity levels for cardiovascular health.

Environmental exposure further compounds risk. Many women spend prolonged hours cooking with solid fuels such as wood, dung, or charcoal, increasing exposure to indoor air pollution, a recognised cardiovascular risk factor.

These overlapping exposures form what can be described as a “layered risk environment”, where hypertension emerges not from one cause, but from accumulated life-course disadvantage.

A system designed for a different epidemic

Perhaps the most important implication is not clinical but institutional.

Bangladesh’s primary health care system has historically focused on maternal and child health. However, the findings show that women’s health risks do not end with childbirth. Instead, cardiovascular disease risk accelerates during reproductive years.

Current national non-communicable disease (NCD) screening strategies typically begin at age 40, potentially missing a critical window where hypertension in women is already accelerating.

This misalignment between policy thresholds and epidemiological reality may be delaying early detection in a high-risk population.

The conclusion is not simply that women in Bangladesh have higher hypertension after a certain age.

It is that the timing of risk itself is socially and biologically patterned.

The data suggest a shift from a male-dominant risk profile in early adulthood to a female-dominant burden in mid-life, driven by a combination of metabolic change, reproductive health factors, behavioural constraints, mental health stressors, and environmental exposure.

Hypertension in Bangladesh, therefore, is not evenly distributed across gender or age. It is dynamically redistributed across the life course.

And that redistribution begins earlier than most health systems are prepared for.