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Early ageing in middle-aged men is associated with adverse social factors and increased mortality risk: the Malmö
1Department of Clinical Sciences Medicine, University Hospital, Malmö, Sweden.
Aims:
This study examined whether middle-aged men exhibiting markers of early ageing showed a different pattern of social factors, lifestyle, and biological variables compared with controls, and whether early ageing was associated with an increased mortality risk.
Subjects And Methods:
We used a subgroup of 5,722 middle-aged men (mean age 47 years), investigated twice, from the Malmö Preventive Project (MPP), a screening programme attended by a total of 22,444 men between 1974 and 1992. Markers of biological ageing, such as decreased lung function, increased pulse pressure, and decreased height, were used to identify early aged subjects and a control group. These were followed up by use of local and national registers for a mean of 22 years. Cox's proportional regression was used to estimate multivariate relative risks (RR) for mortality with 95% confidence intervals (CI).
Results:
Men with early ageing were more often smokers, living alone, or less likely to be non-manual workers than control subjects. These men also had an increased age-adjusted mortality relative risk, RR 1.29 (95% CI 1.10-1.52). After adjustment for social and lifestyle factor there was still a significant difference in mortality between the two groups, RR 1.19 (95% CI 1.00-1.42).
Conclusion:
Early biological ageing in middle-aged men is associated with an increased mortality risk during long-term follow-up that cannot be fully explained by social background characteristics or adverse lifestyle.
Insights
Middle-aged men with early biological ageing face higher mortality risks. This increased risk persists even after accounting for social factors and lifestyle choices, highlighting ageing as a key predictor.
Area of Science:
- Gerontology
- Epidemiology
- Public Health
Background:
- Early biological ageing in middle-aged men is not well understood in relation to mortality.
- Identifying predictors of mortality risk is crucial for preventative health strategies.
Purpose of the Study:
- To investigate differences in social, lifestyle, and biological factors between early-aged and control middle-aged men.
- To determine if early biological ageing is associated with an increased risk of mortality.
Main Methods:
- Utilized a subgroup of 5,722 middle-aged men from the Malmö Preventive Project (MPP).
- Identified early aged subjects using markers like decreased lung function and increased pulse pressure.
- Followed subjects for a mean of 22 years using registers and analyzed mortality risk with Cox regression.
Main Results:
- Men with early ageing were more likely to be smokers, live alone, and less likely to be non-manual workers.
- Early ageing was associated with an increased age-adjusted mortality risk (RR 1.29).
- A significant mortality difference remained after adjusting for social and lifestyle factors (RR 1.19).
Conclusions:
- Early biological ageing in middle-aged men is linked to a significantly increased long-term mortality risk.
- This association is not fully explained by social background or adverse lifestyle factors.
- Biological ageing markers are important indicators of future mortality risk.
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