Table 1.

Comparisons tested in this study. For all tests, the dependent variable was medication price

Category of Analysis	Independent Variable	Test Performed	Number of Groups
Geographic	Buyers	Kruskal Wallis H	19
Geographic	Region*	Mann-Whitney U	2
Geographic	GDP (nominal)†	Linear Regression	N/A
Geographic	All-Cancer Incidence (per 100,000)‡	Linear Regression	N/A
Medication	Essential Cancer Medications	Kruskal Wallis H	43
Medication	Essential Medication Categories	Kruskal Wallis H	3
Medication	Medication Formulations	Mann-Whitney U	2
Medication	Pre/Post Generic Approval Date§	Mann-Whitney U	2
Longitudinal	Year	Kruskal Wallis H	5

*Obtained from the United Nations [20]

^†Obtained from the International Monetary Fund [21]

^‡Obtained from the International Agency for Research on Cancer [22]

^§Obtained from DrugBank [26]