Physical activity, physical fitness and quality of life in outpatients with major depressive disorder versus matched healthy controls: Data from a low-income country.

BACKGROUND

There is an urgent need to increase awareness that people with major depressive disorder (MDD) in low-income countries do also have a compromised physical health. We compared physical fitness and physical activity levels in outpatients with MDD with healthy matched controls in Uganda and explored whether the variance in quality of life (QoL) can be explained by the variance in physical fitness and physical activity levels.

METHODS

Fifty outpatients (35 men, median age = 29 years, interquartile range = 14 years) and 50 age, gender and body mass index matched controls performed a 6-minute walk test (6MWT), the World Health Organization Quality of Life short-version (WHOQoLBref), Simple Physical Activity Questionnaire (SIMPAQ), and Brief Symptoms Inventory-18 (BSI-18). Differences between groups were assessed with a Mann Whitney U test and backward stepwise multivariable regression analysis was performed to evaluate independent variables explaining the variance in WHOQoLBref scores.

RESULTS

Outpatients with MDD have significantly lower 6MWT, SIMPAQ walking, SIMPAQ incidental physical activity, physical and psychological WHOQoLBref scores, and significantly higher BSI-18 depression and anxiety scores. BSI-18 depression was the only significant independent predictor of the WHQoLBref physical score explaining 39.7% of the variance, while the 6MWT score remained the only significant independent predictor of the WHQoLBref psychological score explaining 31.7% of the variance.

CONCLUSIONS

Our data demonstrate that outpatients with MDD in a low-income country are significantly less physically fit and less physically active than the general population. Lower physical fitness levels are also associated with lower QoL levels.