Parental obesity, particularly when both parents are affected, is associated with higher baseline cardiometabolic risk levels and substantially higher disease risk in offspring, though the annual rates of increase do not consistently differ across groups.
Key Findings
Results
Male offspring with both parents affected by overweight/obesity had the highest risk for incident overweight/obesity among male offspring.
Hazard ratio for incident overweight/obesity in male offspring with both parents affected: HR = 3.72 (95% CI, 1.73–7.99)
Male offspring with both parents affected also had the highest risk for central obesity: HR = 2.46 (95% CI, 1.31–4.62)
The association with hypertension in male offspring with both parents affected was elevated but did not reach statistical significance: HR = 1.55 (95% CI, 0.86–2.77)
Reference group was offspring with neither parent affected (Group 1)
Results
Female offspring with both parents affected by overweight/obesity had the highest risk for incident overweight/obesity among female offspring.
Hazard ratio for incident overweight/obesity in female offspring with both parents affected: HR = 4.60 (95% CI, 1.93–10.94)
This was a higher point estimate than the corresponding male HR of 3.72, though formal interaction tests were not significant
Reference group was offspring with neither parent affected (Group 1)
Results
Formal interaction tests for sex × parental obesity were not statistically significant for any cardiometabolic outcome.
All P interaction values for sex × parental obesity were > 0.05 across all outcomes examined
Outcomes examined included incident overweight/obesity, central obesity, and hypertension
Despite numerically different hazard ratios between males and females, no statistically significant effect modification by sex was detected
Results
Offspring with both parents affected had the highest baseline levels of cardiometabolic risk measures, but annual rates of increase were not consistently higher across parental obesity groups.
Cardiometabolic measures examined included body mass index, waist circumference, and blood pressure
Linear mixed-effects models with polynomial age terms were used to estimate longitudinal trajectories and annual changes
Higher baseline levels did not translate into consistently steeper rates of increase over time for the both-parents-affected group
This pattern suggests that elevated absolute risk in offspring of obese parents is driven more by starting levels than by faster progression
Methods
The study analyzed prospective data from 4,982 offspring followed from childhood to adulthood using data from the China Health and Nutrition Survey (1989–2015).
Offspring aged ≥2 years were included and categorized into four groups based on parental overweight/obesity status
Groups were: neither parent affected (Group 1, reference), only father affected (Group 2), only mother affected (Group 3), and both parents affected (Group 4)
Cox proportional hazards models were used to assess hazard ratios for incident overweight/obesity, central obesity, and hypertension
The survey spanned 26 years (1989–2015), enabling longitudinal cardiometabolic trajectory analysis
Background
Parental obesity is identified as a strong risk factor for childhood adiposity, with limited prior evidence on longitudinal cardiometabolic disease progression in offspring.
The study was motivated by the gap in evidence regarding parental obesity's association with longitudinal cardiometabolic disease progression from childhood to adulthood
Prior literature had established parental obesity as a risk factor for childhood adiposity but not for long-term cardiometabolic trajectories
The study aimed to address this gap using prospective cohort data
Conclusions
The findings underscore the family unit as a critical target for early preventive strategies against cardiometabolic disease.
Both-parent obesity was associated with substantially higher disease risk in offspring for overweight/obesity and central obesity
The authors concluded that preventive strategies should target the family unit rather than individuals alone
The pattern of higher baseline rather than faster annual increase suggests that early intervention before risk accumulates may be particularly important
What This Means
This research suggests that children whose parents are overweight or obese face substantially higher risks of developing obesity, abdominal obesity, and high blood pressure as they grow into adulthood. Using 26 years of health data from nearly 5,000 Chinese children and adults, researchers found that when both parents were overweight or obese, their sons were nearly four times more likely to develop overweight/obesity and about two and a half times more likely to develop central obesity compared to children of healthy-weight parents. Daughters with two affected parents were more than four times more likely to develop overweight/obesity. Importantly, these elevated risks appeared to stem primarily from children starting at higher body weight and blood pressure levels rather than from gaining weight or blood pressure at a faster rate over time.
The study also found that while hazard ratios for these outcomes looked somewhat different for boys and girls, the difference between sexes was not statistically significant, meaning the data did not conclusively show that parental obesity affects boys and girls differently. The association between having two obese parents and developing high blood pressure was elevated in boys but did not reach statistical significance, suggesting a possible but unconfirmed link that warrants further study.
This research suggests that preventing obesity in parents—or intervening early in families where parents are already overweight or obese—could be an important strategy for protecting children's long-term heart and metabolic health. Rather than focusing only on individual children or adults, public health efforts may benefit from treating the family as a whole unit for intervention, potentially catching elevated cardiometabolic risk before it becomes established disease.
Qian Y, Gao C, Wan N, Yan Y. (2026). Parental obesity and offspring cardiometabolic trajectories from childhood to adulthood.. Frontiers in public health. https://doi.org/10.3389/fpubh.2026.1836841