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98.

In one calendar year mortality due to malignant diseases was compared between the population of Town A (mortality: 420 / 100 000) and the population of Town B (mortality: 458 / 100 000). Indicate the correct interpretation of the obtained data:

A. two populations (A and B) differ statistically significantly in terms of mortality because the difference is greater than 5%.
B. incidence of malignant diseases is larger in Town B than in Town A.
C. case fatality in malignant diseases is larger in Town B than in Town A providing that the observed difference in mortality is statistically significant.
D. reliable assessment of the difference in between-town mortality due to malignant diseases is not possible without age standardization.
E. duration of observation (one calendar year) is too short to implement populationbased comparisons of two mortalities due to malignant diseases.

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