Results of unadjusted space-time cluster analyses performed in SpaceStat, based on 15 nearest neighbours, 999 permutations, and by three different time scales.

aThe total number of statistically significant cases with a Qik p-value of 0.001, which indicates the number of cases that are centers of clusters over their life-course. b Number of statistically significant Qik (p = 0.001) cases that also have significant Qikt (p ≤ 0.05) and are members of a cluster of at least 4 cases. c Indicate where and when the cases tend to cluster. dRefers to the map in figure 1, which shows the suggested clusters of NHL in Denmark based on the unadjusted analyses. e Control group.