Volume 9, Number 11—November 2003
Research
Human Hantavirus Infections, Sweden
Figure 1
![Indexed relative distribution of nephropathia epidemica (NE) cases during 1991 to 1998, within age group and sex (i) in relation to the total human population (pop) in the northern region (NR), where deviations from zero indicate overrepresentation vs. underrepresentation, as calculated by [index]i = [{(#NE)i½(#NE)NR}½{(#pop)i½(#pop)NR}–1].](/eid/images/03-0275-F1.jpg)
Figure 1. Indexed relative distribution of nephropathia epidemica (NE) cases during 1991 to 1998, within age group and sex (i) in relation to the total human population (pop) in the northern region (NR), where deviations from zero indicate overrepresentation vs. underrepresentation, as calculated by [index]i = [{(#NE)i½(#NE)NR}½{(#pop)i½(#pop)NR}–1].