Exploring the relationship between neighborhood walkability and mental health: A study of urban areas in Texas.

BACKGROUND

While importance of walkable neighborhoods for health is increasingly recognized, the relationship between walkability and mental health remains, especially in urban settings, unclear. This study investigated the link between walkability and mental health in urban Texas. We hypothesized that higher neighborhood walkability would correlate with lower mental health encounters.

METHODS

A cross-sectional study using Texas adult outpatient encounters from 2014 to 2019 supplemented by ZIP Code-level US-census socioeconomics data. Neighborhood walkability was assessed using the 2019-WalkScore (0-100) and was categorized into four groups: from completely car-dependent to very walkable/walker's paradise. Outpatient mental health encounters included depression, bipolar disorder, anxiety, and stress disorders. Generalized linear models were used to assess the association between walkability and mental health, while adjusting for demographics and socioeconomics.

RESULTS

We included 55 million encounters from 751 Texas ZIP Codes (median WalkScore 28, 73 % < 65 years, 64 % women, 15 % Blacks, 16 % Hispanics, 15 % live in poverty, and 17 % without health insurance). Anxiety/stress disorders contributed to 68 % of the mental health encounters. The rate of mental health encounters was at least 3 times higher (5543 vs 1827 encounters per 100,000 population) (RR 3.03, 95%CI 1.53-6.03) in urban areas with the highest WalkScores, compared to lowest walkability neighborhoods. A similar pattern was found among depression (RR 4.8, 95%CI 2.45-9.46) and bipolar (RR 10.8, 95%CI 4.17-28.07) encounters. After adjusting for demographic and socioeconomic factors, the positive association remained significant for both depression (aRR 1.94, 95%CI 1.19-3.17) and bipolar (aRR 2.76, 95%CI 1.65-4.65) encounters, but not for total mental health encounters (aRR 1.22, 95%CI 0.76-1.96, P = 0.416).

CONCLUSION

The study findings challenge our initial hypothesis, revealing a positive association between neighborhood walkability and various mental health encounters, emphasizing the complex intersection between urban environment and mental health. This suggests that walkability does not solely determine mental health outcomes. A deeper understanding of how demographics, socioeconomic factors, and neighborhood characteristics interact is essential to inform policies that create more equitable mentally-healthy cities.