Neighbourhood Greenspace and Health in a Large Urban Centre

Studies have shown that natural environments can enhance health and here we build upon that work by examining the associations between comprehensive greenspace metrics and health. We focused on a large urban population center (Toronto, Canada) and related the two domains by combining high-resolution satellite imagery and individual tree data from Toronto with questionnaire-based self-reports of general health perception, cardio-metabolic conditions and mental illnesses from the Ontario Health Study. Results from multiple regressions and multivariate canonical correlation analyses suggest that people who live in neighborhoods with a higher density of trees on their streets report significantly higher health perception and significantly less cardio-metabolic conditions (controlling for socio-economic and demographic factors). We find that having 10 more trees in a city block, on average, improves health perception in ways comparable to an increase in annual personal income of $10,000 and moving to a neighborhood with $10,000 higher median income or being 7 years younger. We also find that having 11 more trees in a city block, on average, decreases cardio-metabolic conditions in ways comparable to an increase in annual personal income of $20,000 and moving to a neighborhood with $20,000 higher median income or being 1.4 years younger.

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References:

1. Nowak, D. J., Crane, D. E. & Stevens, J. C. Air pollution removal by urban trees and shrubs in the United States. Urban forestry & urban greening 4, 115–123 (2006).

   Article Google Scholar

2. Nowak, D. J., Hirabayashi, S., Bodine, A. & Greenfield, E. Tree and forest effects on air quality and human health in the United States. Environmental Pollution 193, 119–129 (2014).

   CAS Article Google Scholar

3. Akbari, H., Pomerantz, M. & Taha, H. Cool surfaces and shade trees to reduce energy use and improve air quality in urban areas. Solar energy 70, 295–310 (2001).

   ADS Article Google Scholar

4. Kaplan, S., Kaplan, R. & Wendt, J. S. Rated preference and complexity for natural and urban visual material. Perception & Psychophysics 12, 354-&, 10.3758/bf03207221 (1972).

   Article Google Scholar

5. Smardon, R. C. Perception and aesthetics of the urban-environment – review of the role of vegetation. Landscape and Urban Planning 15, 85–106, 10.1016/0169-2046(88)90018-7 (1988).

   Article Google Scholar

6. Richardson, E. A., Pearce, J., Mitchell, R. & Kingham, S. Role of physical activity in the relationship between urban green space and health. Public health 127, 318–324 (2013).

   CAS Article Google Scholar

7. Huynh, Q., Craig, W., Janssen, I. & Pickett, W. Exposure to public natural space as a protective factor for emotional well-being among young people in Canada. BMC public health 13, 407 (2013).

   Article Google Scholar

8. Villeneuve, P. J. et al. A cohort study relating urban green space with mortality in Ontario, Canada. Environmental Research 115, 51–58, 10.1016/j.envres.2012.03.003 (2012).

   CAS ADS Article PubMed Google Scholar

9. Maas, J. et al. Morbidity is related to a green living environment. Journal of epidemiology and community health 63, 967–973 (2009).

   CAS Article Google Scholar

10. Mitchell, R. & Popham, F. Effect of exposure to natural environment on health inequalities: an observational population study. Lancet 372, 1655–1660, 10.1016/s0140-6736(08)61689-x (2008).

    Article PubMed Google Scholar

11. Grahn, P. & Stigsdotter, U. A. Landscape planning and stress. Urban forestry & urban greening 2, 1–18 (2003).

    Article Google Scholar

12. Pretty, J., Peacock, J., Sellens, M. & Griffin, M. The mental and physical health outcomes of green exercise. International journal of environmental health research 15, 319–337 (2005).

    Article Google Scholar

13. Storgaard, R. L., Hansen, H. S., Aadahl, M. & Glumer, C. Association between neighbourhood green space and sedentary leisure time in a Danish population. Scandinavian Journal of Public Health 41, 846–852, 10.1177/1403494813499459 (2013).

    Article PubMed Google Scholar

14. Kaczynski, A. T. & Henderson, K. A. Environmental correlates of physical activity: a review of evidence about parks and recreation. Leisure Sciences 29, 315–354 (2007).

    Article Google Scholar

15. Humpel, N., Owen, N. & Leslie, E. Environmental factors associated with adults’ participation in physical activity: a review. American journal of preventive medicine 22, 188–199 (2002).

    Article Google Scholar

16. Berman, M. G., Jonides, J. & Kaplan, S. The Cognitive Benefits of Interacting With Nature. Psychological Science 19, 1207, 10.1111/j.1467-9280.2008.02225.x ER (2008).

    Article PubMed Google Scholar

17. Kaplan, S. & Berman, M. G. Directed Attention as a Common Resource for Executive Functioning and Self-Regulation. Perspectives on Psychological Science 5, 43, 10.1177/1745691609356784 (2010).

    Article PubMed Google Scholar

18. Berto, R. Exposure to restorative environments helps restore attentional capacity. Journal of Environmental Psychology 25, 249, 10.1016/j.jenvp.2005.07.001 (2005).

    Article Google Scholar

19. Taylor, A. F. & Kuo, F. E. Children With Attention Deficits Concentrate Better After Walk in the Park. Journal of Attention Disorders 12, 402, 10.1177/1087054708323000 er (2009).

    Article PubMed Google Scholar

20. Berman, M. G. et al. Interacting with nature improves cognition and affect for individuals with depression. Journal of Affective Disorders 140, 300–305, 10.1016/j.jad.2012.03.012 (2012).

    Article PubMed PubMed Central Google Scholar

21. Cimprich, B. & Ronis, D. L. An environmental intervention to restore attention in women with newly diagnosed breast cancer. Cancer nursing 26, 284 (2003).

    Article Google Scholar

22. Kuo, F. E. & Sullivan, W. C. Environment and crime in the inner city – Does vegetation reduce crime? Environment and Behavior 33, 343 (2001).

    Google Scholar

23. Kuo, F. E. & Sullivan, W. C. Aggression and violence in the inner city – Effects of environment via mental fatigue. Environment and Behavior 33, 543 (2001).

    Article Google Scholar

24. Ulrich, R. S. View through a window may influence recovery from surgery. Science 224, 420–421, 10.1126/science.6143402 (1984).

    CAS ADS Article PubMed PubMed Central Google Scholar

25. Donovan, G. H. et al. The relationship between trees and human health: Evidence from the spread of the emerald ash borer. American journal of preventive medicine 44, 139–145 (2013).

    Article Google Scholar

26. Lasser, K. E., Himmelstein, D. U. & Woolhandler, S. Access to Care, Health Status and Health Disparities in the United States and Canada: Results of a Cross-National Population-Based Survey. American Journal of Public Health 96, 1300–1307, 10.2105/AJPH.2004.059402 (2006).

    Article PubMed PubMed Central Google Scholar

27. Dunlop, S., Coyte, P. C. & McIsaac, W. Socio-economic status and the utilisation of physicians’ services: results from the Canadian National Population Health Survey. Social science & medicine 51, 123–133 (2000).

    CAS Article Google Scholar

28. Mossey, J. M. & Shapiro, E. Self-rated health: a predictor of mortality among the elderly. American journal of public health 72, 800–808 (1982).

    CAS Article Google Scholar

29. Idler, E. L. & Benyamini, Y. Self-rated health and mortality: a review of twenty-seven community studies. Journal of health and social behavior 38, 21–37 (1997).

    CAS Article Google Scholar

30. Engström, G., Hedblad, B. & Janzon, L. Subjective well-being associated with improved survival in smoking and hypertensive men. European Journal of Cardiovascular Risk 6, 257–261 (1999).

    Article Google Scholar

31. Miller, A. B., Baines, C. J., To, T. & Wall, C. Canadian National Breast Screening Study: 1. Breast cancer detection and death rates among women aged 40 to 49 years. CMAJ: Canadian Medical Association Journal 147, 1459 (1992).

    CAS PubMed Google Scholar

32. Vardoulakis, S., Fisher, B. E., Pericleous, K. & Gonzalez-Flesca, N. Modelling air quality in street canyons: a review. Atmospheric environment 37, 155–182 (2003).

    CAS ADS Article Google Scholar

33. Amoly, E. et al. Green and blue spaces and behavioral development in Barcelona schoolchildren: the BREATHE project. Environ Health Perspect 122, 1351–1358, 10.1289/ehp.1408215 (2014).

    Article PubMed PubMed Central Google Scholar

34. City of Toronto, P., Forestry and Recreation. Every Tree Counts: A Portrait of Toronto’s Urban Forest. Urban Forestry (2013).

35. Hemery, G., Savill, P. & Pryor, S. Applications of the crown diameter–stem diameter relationship for different species of broadleaved trees. Forest Ecology and Management 215, 285–294 (2005).

    Article Google Scholar

36. Troxel, B., Piana, M., Ashton, M. S. & Murphy-Dunning, C. Relationships between bole and crown size for young urban trees in the northeastern USA. Urban Forestry & Urban Greening 12, 144–153 (2013).

    Article Google Scholar

37. Rubin, D. B. Multiple imputation for nonresponse in surveys. 81 (John Wiley & Sons, 2004).

38. Rubin, D. B. Inference and missing data. Biometrika 63, 581–592 (1976).

    MathSciNet Article Google Scholar

39. Schafer, J. L., Olsen, M. K. & Smardon, R. C. Multiple imputation for multivariate missing-data problems: A data analyst’s perspective Multivariate behavioral research 33, 545–571 (1998).

    CAS Article Google Scholar

40. Honaker, J., King, G. & Blackwell, M. Amelia II: A program for missing data. Journal of Statistical Software 45, 1–47 (2011).

    Article Google Scholar

41. Owen, M., Imai, K., King, G. & Lau, O. Zelig: Everyone’s Statistical Software. R package version, 4.1-3 (2013).

42. Rubin, D. B. & Schenker, N. Multiple imputation for interval estimation from simple random samples with ignorable nonresponse. Journal of the American Statistical Association 81, 366–374, 10.2307/2289225 (1986).

    MathSciNet Article MATH Google Scholar

43. Hotelling, H. Relations between two sets of variates. Biometrika, 28 321–377 (1936).

    Article Google Scholar

44. Johnson, R. A., Wichern, D. W. & Education, P. Applied multivariate statistical analysis. Vol. 4 (Prentice hall Englewood Cliffs, NJ, 1992).