Objectives
Recent evidence suggests depression could result in abdominal obesity in the elderly. Few longitudinal studies are available and none has been conducted outside of the US.
Methods
To examine the relationship between depressive symptoms and abdominal obesity, data from 3998 community dwelling Chinese elderly men and women aged 65 years and above with 4-year follow up were analyzed. Depression was defined by a Geriatric Depression Scale score of 8 or higher. At baseline and after 4 years, overall obesity measures included body mass index, percentage of body fat and general adiposity or body fat index (BFI) (expressed by total body fat mass measured by DEXA in kilograms divided by the square of stature in metres). Abdominal obesity measures included waist circumference, waist hip ratio and relative truncal fat (ratio of truncal fat mass to total fat mass measured by DEXA).
Results
After adjustment for socio-demographics, lifestyle and medical factors, the presence of clinically relevant depressive symptoms at baseline was associated with significant decrease in waist circumference at follow up after adjusting for socio-demographic factors, baseline obesity, lifestyle and medical factors (β=−1.801, t=−2.93, df=1564, p=0.0034) although this relationship disappeared in older aged women in further age stratified analysis.
Conclusions
This study shows that depressive symptoms may result in a decrease in abdominal obesity, suggesting that more research is needed to further explore this relationship. Similar studies conducted in different cultural groups may help to explain these conflicting findings.