The Importance of Green Space an - MDPI

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Cross-Validation. Accuracy. 0.75 (standard error = 0.02). AUC (Area under curve). 0.62 (standard error = 0.03). Predictor variables. Standardised Coefficient.
Int. J. Environ. Res. Public Health 2016, 13, doi:10.3390/ijerph13040440

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Supplementary Materials: Mitigating Stress and Supporting Health in Deprived Urban Communities: The Importance of Green Space and the Social Environment Catharine Ward Thompson, Peter Aspinall, Jenny Roe, Lynette Robertson and David Miller In the following sections Correlated Component Regression (CCR) data is shown for each of the Community groups in relation to either perceived stress or general health. In each case, the first table or tables give the model accuracy for both training and cross validation, followed by the standardized regression coefficients and their breakdown by components, and the Pratt Co-efficient. Subsequent tables show the chi-squared tests for accuracy of prediction of any green space variables shown to be significant. Table S1. CCR Logistic regression model predicting PSS for Community 1.

Model Fit Accuracy AUC (Area under curve) Predictor variables Have a garden or allotment a Predictor Table Have a garden or allotment Predictor Importance Have a garden or allotment

Cross-Validation 0.75 (standard error = 0.02) 0.62 (standard error = 0.03) Standardised Coefficient 2.69 Out of sample frequency (n = 3000) 2967 Contribution to Model (Pratt) 100% as only one predictor

Note: a 1 = yes, 2 = no. Table S2. Chi-squared test showing relationship between PSS and having a garden or allotment, Community 1. Variable Have a garden or allotment (before) yes no Total

Lower Stress (PSS) %

Higher Stress (PSS) %

Row Freq (n)

30 4

70 96

73 28 101

χ2 = 10.39, df = 1, p < 0.0013. Table S3. CCR Logistic regression model predicting PSS for Communities 2, 3 and 4. Model Fit Accuracy AUC (Area under curve)

Cross-Validation 0.72 (standard error = 0.01) 0.69 (standard error = 0.02)

Predictor Variable

Standardised Coefficient

In full-time employment a Place belonging Social isolation b Car access a

1.09 −0.70 −0.75 0.82

Out of Sample Frequency (n = 2000 Runs) 2000 2000 1990 1960

Notes: a 1 = yes, 2 = no; b 1 = often, 2 = sometimes, 3 = never.

Contribution to Model (Pratt) % 28% 23% 30% 19%

Int. J. Environ. Res. Public Health 2016, 13, doi:10.3390/ijerph13040440

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Table S4. CCR Logistic regression model predicting PSS for Communities 2, 3 and 4. Model Fit Accuracy AUC (Area under curve)

Cross-Validation 0.62 (s.e. = 0.01) 0.63 (s.e. = 0.01) Standardised Coefficient −0.59 0.42 −0.43 −0.38 −0.37 0.25 −0.20 0.19 0.19

Predictor Variables % green space area Have a garden or allotment a Age Children