Fig. 1

Association estimates between the change in the outcome of cognitive parameters and the IQR increment of percentage green space within several radii around the residence of the children. A Change in mean reaction time (msec) for sustained and selective attention in the Continuous Performance Test (n = 307); B Change in mean reaction time (msec) for selective attention in the Stroop Test (n = 305); C Change in the number of digits for the short-term memory in the Digit Span Forward Test (n = 305) and D. in the Digit Span Backward Test (n = 306); E Change in latency (sec) for the visual information processing speed in the Pattern Comparison Test (n = 299) and F. in the Digit-Symbol Test (n = 307). The main models (single exposure) were adjusted for sex, age (linear and quadratic term), BMI, education of the mother, highest occupation of either parent, passive smoking, day of the week, season of examination, neighbourhood household income, and the random effect of the study area and subject. Statistically significant estimates (p < 0.05) at a 95% confidence level are marked with an asterisk, and with † for borderline significance (0.05 < p < 0.10)