Long-Term Physical Health Outcomes from a Prospective Cohort Followed from Puberty

What the evidence says

A meta-analysis of childhood maltreatment (Norman 2012) links physical abuse, emotional abuse, and neglect to sexually transmitted infections and risky sexual behavior later in life, with physical abuse carrying the largest association (OR 1.78, 95% CI 1.50–2.10), followed by emotional abuse (OR 1.75, 95% CI 1.49–2.04) and neglect (OR 1.57, 95% CI 1.39–1.78). The same review reports maltreatment associated with increased risk of HIV and herpes simplex virus type 2 (HSV2) infection, though confidence in both direction and magnitude for that specific finding is only medium, pending confirmation from additional prospective (rather than retrospective) studies. For a broader category — chronic disease and lifestyle risk factors following maltreatment — the evidence is explicitly described as suggestive but unconfirmed, with confidence rated low on both direction and magnitude.

A separate prospective cohort (Van Assche 2024) followed children exposed prenatally to radiotherapy into adulthood. Among 43 participants, including 14 who reached adulthood (median age 30.7, IQR 18.6), no childhood malignancies were observed. Chronic medical conditions affecting daily functioning occurred in 7.0% of the cohort (3 of 43): spasmophilia, spastic diplegia, and IgG deficiency, all in participants who were both born preterm (under 37 weeks) and exposed to radiotherapy specifically in the third trimester. ADHD prevalence in this cohort was also 7.0% (3 of 43), which the source describes as in line with the general population rate of 5–7.2%, indicating no measured elevation above baseline.

Need for remedial support in this cohort tracked with prematurity rather than radiotherapy. Just over a third of participants (34.9%, 15 of 43) required some form of remedial support at some point — extra school support, physiotherapy, speech therapy, or psychological support — and 80% of those (12 of 15) were born preterm. By contrast, need for support was not associated with any radiotherapy factor tested (all p>.05).

Outside the maltreatment and radiotherapy-exposure literatures, a prospective analysis of Canada Pension Plan contributors (Lynch 2004, citing Wolfson et al. 1993) followed more than half a million male retirees and found a clear gradient between earned income at ages 45–65 and mortality at ages 65–70: higher income tracks with lower later-life mortality. Because income was measured decades before the mortality outcome, the source argues the temporal sequence rules out reverse causation for the majority of cases, supporting a causal reading of income shaping later mortality rather than the reverse.

Where the evidence splits

No contradictions in the current sources.

Thresholds and dose-response

No threshold established in the current sources.

Open empirical questions

• Whether the maltreatment–chronic disease and lifestyle risk factor relationship holds up under prospective studies with standardized assessment and longer follow-up — not yet confirmed.
• Whether the prenatally radiotherapy-exposed cohort's health outcomes (malignancy, chronic conditions, ADHD, remedial support) persist or change beyond the ages reached so far (only 14 of 43 participants had reached adulthood, median age 30.7).
• Whether preterm birth and third-trimester radiotherapy exposure have independent effects on chronic medical impairment, since all three affected participants had both exposures simultaneously.
• Whether the income–mortality gradient observed in male Canada Pension Plan contributors generalizes to women or to populations outside Canada.