Socioeconomic indicators in epidemiologic research: A practical example from the LIFEPATH study

Area of Science:

• Epidemiology
• Social Determinants of Health
• Public Health

Background:

• Socioeconomic position (SEP) is crucial in epidemiological research.
• Education, occupational class, and income are key SEP indicators.
• Consistent health outcome disparities are linked to SEP.

Purpose of the Study:

• To establish socioeconomic classifications for the LIFEPATH project.
• To compare all-cause mortality gradients across different SEP indicators.
• To analyze social inequalities in mortality within adult cohorts.

Main Methods:

• Harmonized social indicator data (education, occupation, income) from 11 adult cohorts.
• Poisson regression used to estimate mortality by SEP within cohorts.
• Meta-analysis employed to evaluate mortality differences across cohorts.

Main Results:

• In men, mortality inversely associated with occupational class and education; not father's occupation.
• Women showed smaller mortality increases in lower social strata compared to men.
• No significant mortality differences found in women, except for the lowest education category.

Conclusions:

• Validated three-level classifications for occupational class and education predict male mortality.
• Assessing women's sole SEP may misclassify their social position, attenuating mortality differences.
• Partner's SEP should be considered for accurate assessment of women's social position and mortality risk.