Fig. 1.

(a) Interaction plot showing simple slopes of the regression of school FV availability on student FV intake at different levels of all food outlets within a 5-km radius of schools. Solid lines indicate that the slopes are within the regions of significance (P < 0·05) presented in Fig. 1(b), while dashed lines indicate the slopes are outside of the regions of significance (P ≥ 0·05) presented in Fig. 1(b). (b) Johnson–Neyman regions of significance and confidence bands (95 % CI) for the conditional relation between school FV availability and student FV intake as a function of all food outlets within 5 km of schools. Blue shaded areas reflect regions of significance ((0, 58·9) and (> 1990·2)) and the bold horizontal line indicates the range of observed food outlets in the sample data (0–2828). When the number of food outlets is between 0 and 58 and 1991 and higher, the slope of school FV availability is P < 0·05. FV, fruit and vegetable