Adult weight gain linked to prostate cancer death in men
Among men with prostate cancer, the relative rate of death from the disease was higher with the steepest versus slowest weight gain (hazard ratio 1.23).
Our read
Populations- Studied:
- Cohort study of 20,541 Swedish men with prostate cancer
- What changed:
- Prostate cancer death was higher with the steepest prediagnostic weight gain than with the lowest weight gain (hazard ratio 1.23)
- The catch:
- Physical activity was not accounted for and could confound the association
Editor of record: Boris Djordjevic · AgingResearch.News
The 258,494 men in Sweden in this observational cohort study had at least three weight records between ages 17 and 60. Researchers modeled weight changes before cancer diagnosis and tracked outcomes through national registers. Over a median follow-up of 25 years, 22,055 men developed prostate cancer and 4,547 died from it.
Among 20,541 men with prostate cancer included in the survival analysis, the highest fifth for adult weight gain had a hazard ratio of 1.23 for prostate cancer death compared with the lowest fifth. This association primarily reflected weight gain between ages 45 and 60, with a hazard ratio of 1.31 per kilogram gained per year. Steeper adult weight gain was not linked to aggressive prostate cancer.
Why it matters
Prostate cancer was diagnosed at an average age of 70. The authors highlighted midlife weight management as a potentially modifiable factor for reducing deaths from the disease.
Caveats
The analysis tracked weight gain rather than testing whether preventing it reduced prostate cancer deaths. All participants were men in Sweden, and differences in screening uptake may have influenced diagnosis patterns to an uncertain extent.
From the paper
- Participants
This study included 258 494 men with 1 226 021 cancer-free weight measurements, originating from those with at least 3 weight measurements between the ages of 17 and 60 years, recorded between 1963 and 2019.
- Follow-up
Over a median follow-up of 25 years (IQR 14-30), 22 055 men (8.5%) were diagnosed with PCa at a mean age of 70 years (SD 8), and 4547 (1.8%) died from the disease.
- Result
A steep weight gain trajectory was inversely associated with total PCa (HR for Q5 vs Q1 = 0.95, 95% CI = 0.91 to 0.99) and non-aggressive PCa (HR = 0.88, CI = 0.83 to 0.93), with no evidence of an association observed for aggressive PCa (HR = 1.03, CI = 0.95 to 1.13).
- Limitation
We were unable to account for unintentional weight loss and lacked data on PSA testing frequency and on potential confounding factors, such as physical activity and genetic profiling.
Quoted word for word from the full text on PubMed Central.
The paper
Lund University
Journal of the National Cancer Institute, Jan 27, 2026, Open access
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