Akaike's Information Criterion, DAIC, and Akaike's weights of 14 survival analysis models, based on the Log-logistic survival time distributions, and the use of Gross Domestic Product (GDP), Healthcare Spending per Capita, Number of Physicians per Capita, Direct and indirect flights as predictors.

Interaction effects, when included, are only pairwise, for each set of flights and each socioeconomic factor (e.g., Healthcase Spending x Indirect Flights is used, but neither GDP x Healthcare Spending nor Direct x Indirect Flights is examined due to cross-correlation).