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Time specific correlation between socio-demographic index (SDI) and female breast cancer case-fatality percent (CFP) in 1990 and 2017 worldwide. Case-fatality percent was calculated by dividing age-standardised death rate by age-standardised incidence rate and multiplied by 100, r represent the correlation coefficient between SDI and CFP among world regions, LSE, Least Square Error fit; LAE, Least Absolute Error fit; SDI(%) ranges from 0 (less developed) to 100 (most developed).
