Early life adversity and the comorbidity of psychopathology and cardiometabolic disorders: insights from the UK Biobank.

Why mental and metabolic illnesses may share an early history

Mental health conditions often occur alongside diabetes or cardiovascular disease. Some of that overlap may begin much earlier than either diagnosis. This study asked whether adversity before birth and during childhood was associated with having both kinds of illness in adulthood.

Looking at illnesses together. The researchers used the UK Biobank, a cohort recruited in middle and later adulthood, and constructed separate measures of prenatal, postnatal and combined adversity. The available samples differed because each measure required different information: approximately 235,000 people contributed to the prenatal analysis, 151,000 to the postnatal analysis, and 83,000 to the combined analysis. Health outcomes included mood and stress-related disorders, substance-related disorders and schizophrenia, alongside type 2 diabetes and several cardiovascular conditions.

The prenatal score combined reported birth size, smoking exposure and maternal illness. The postnatal score included reports of abuse, feeling hated or unloved, and lack of someone to arrange medical care. These scores represented several aspects of early adversity rather than one uniform exposure.

The central outcome was comorbidity: the presence of both a mental health condition and a cardiometabolic condition in the same person. Studying this combination tests whether early experiences are associated with a shared burden of disease, beyond their established relationships with individual diagnoses.

Adversity was associated with both sides of that burden. Higher adversity scores were associated with a greater likelihood of comorbidity. This pattern appeared when prenatal and postnatal adversity were examined separately and when they were combined. The combined score was also associated with most individual outcomes, although the association with cerebral infarction, a type of stroke, was not detected.

A possible shared developmental pathway. The findings fit the idea that early conditions influence systems relevant to both mental and physical health, including stress regulation and inflammation. The study did not directly measure those mechanisms. Its contribution is to show the population-level pattern that such explanations need to account for: mental and metabolic illness can share an early developmental history.

Because the analysis relied partly on adults’ reports of past experiences and examined associations rather than a randomized intervention, it cannot establish that adversity caused the later conditions. It provides a reason to study prevention across mental and physical health together and to investigate which developmental processes connect them.