Impact of national Human Development Index on liver cancer outcomes: Transition from 2008 to 2018

Figure 2 Correlation between Human Development Index and mortality-to-incidence ratio and its transition from 2008 to 2018. The correlation of liver cancer mortality-to-incidence ratios (MIRs) with national Human Development Indexes (HDIs) with the best-fit lines by modified nonlinear regression (“dose-to-response” model) in A: 2018 (slope = -1.868, HDI₅₀ = 1.27, R2 = 0.261); B: 2008 (slope = -4.989, HDI₅₀ = 1.03, R2 = 0.592); C: Significant reduction in overall MIRs in 64 overlapping countries from 2008 (orange) to 2018 (red). ^aP < 0.0001, Weighted Chi-square test; D: Transition of the correlation patterns of liver cancer MIR with national HDI from 2008 (orange, r = -0.617, P < 0.0001) to 2018 (red, r = -0.548, P < 0.0001), showing a declining tendency of MIRs within the decade; E: MIRs of liver cancer in the four HDI groups, with significant differences among the very high, high, medium, and low groups (indicated in green-gradient colors) and a decreasing tendency in each specific group between 2008 (orange) and 2018 (red). ^bP < 0.001, vs very-high-HDI countries in 2018, one-way ANOVA followed by Tukey-Kramer post hoc test. The statistical significance among countries in 2008 is not indicated. ^cP < 0.001, 2008 vs 2018 in the low-HDI group; ^dP < 0.0001, 2008 vs 2018 in the high-HDI group, paired t-test; F: Regional age-standardized mortality (gray) and incidence (white plus gray) rates per 100000 individuals for liver cancer in 2018 (on the left) and 2008 (on the right), with MIR values denoted. HDI: Human Development Index; MIR: Mortality-to-incidence ratio.