Higher depression risks in medium- than in high-density urban form across Denmark

Area of Science:

• Environmental Health
• Urban Planning
• Psychiatry

Background:

• Urban environments are linked to increased depression risks compared to rural settings.
• Specific characteristics of urban form and their association with depression remain underexplored.
• Understanding these relationships is crucial for public health initiatives and urban design.

Purpose of the Study:

• To investigate the association between three-dimensional (3D) urban form and depression risk.
• To quantify urban form using satellite imagery and machine learning.
• To analyze these associations within the Danish population using health and socioeconomic registers.

Main Methods:

• Utilized satellite imagery and machine learning to derive 3D urban form metrics (building density and height).
• Conducted a large-scale case-control study (n=75,650 cases, 756,500 controls) in Denmark.
• Integrated satellite-derived urban form data with individual-level residential, health, and socioeconomic data.

Main Results:

• The highest depression risk was observed in sprawling suburban areas, not dense inner-city zones.
• Living near multistory buildings with accessible open space was associated with the lowest depression risk.
• These associations persisted after adjusting for socioeconomic factors.

Conclusions:

• The spatial configuration of urban environments significantly influences depression risk.
• Urban planning strategies should prioritize integrating open spaces within densely built areas.
• Mitigating depression risk may involve designing urban landscapes that balance density with accessible green spaces.