Fig. 2: Overall cumulative heatwave–mortality relationship by different green space metrics.
From: Small accessible urban parks mitigate heat-related mortality
All cities were grouped based on the evaluation results of five landscape metrics for green space distribution. Data are presented as RRs (centre points) with 95% CIs (vertical lines). Meta-regression analysis provided results for each group, with a grey background indicating significant differences in heatwave risk (P < 0.05, two-sided multivariate Wald tests). The analysis incorporated heatwave definition with two thresholds (92.5% and 95%) and two durations (2 days and 3 days). The landscape metrics included PLAND, PD, LPI, LSI and SPLIT. All landscape metrics are divided into three equal groups: low, medium and high, based on tertile distribution. Detailed numerical values and P values for all comparisons are provided in Supplementary Table 7.
