Distance to power lines: high exposure, 0-5 m; low exposure, >100 m

 

Distance from power lines: <50 m, 6% of controls

 

a The actual definition of exposure used in the analysis that compared cases with controls.

b Whether the person ascertaining exposure was aware of whether the residence was occupied by a case or control.

c Proportion of controls for leukemia assigned to the high-exposure category.

d Time of occupancy for the residences considered in the analysis that compared cases with controls.



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