The departments of health for Frederick County and the state of Maryland looked at cancer rates between 1992 and 2008 in an area 2 miles out from contaminated sites in Fort Detrick.
Fort Detrick is the base where the Army carried out chemical and biological testing through the 1970s, and hundreds of nearby residents attribute their cancers to that testing.
The health departments found no statistically significant difference in the rate of cancer for the area.
Residents point out that anyone who moved out of the area before being diagnosed wouldn't have been counted, and there isn't any data from before 1992.
Health officials said no data is perfect and they used the best they had.
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