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Socioeconomic status and change in sports activity among middle-aged and older men and women: evidence from the German Ageing Survey.

Background
Sports activity (SA) behavior is unequally distributed across socioeconomic status (SES) groups. However, little is known about the impact of SES on change in SA over time.


Methods
Based on data from the German Ageing Survey, we examined the role of objective (education, occupational prestige, household equivalent income, composite SES-index) and subjective (self-rated standard of living) SES indicators on negative and positive changes in SA during a follow-up of 6 years among adults aged 40+ years using logistic regression analysis.


Results
Among active individuals at baseline, 32.1% of males and 24.8% of females experienced a negative change in SA. Among inactive individuals, 25.8 and 29.9% experienced a positive change. In the multivariate analysis, males and females with low SES were about twice as likely to experience a negative change and half as likely to experience a positive change. These patterns were observed regardless which SES indicator was examined.


Conclusions
This study provides comprehensive evidence for socioeconomic inequalities in negative and positive changes in SA behavior among middle-aged and older adults in Germany. To reduce socioeconomic inequalities, future SA interventions should address the mechanisms leading to differential probabilities of change in SA behavior by SES.