Point estimates for the relative risks were computed by using the observed to expected ratios in the individual exposure groups.
This was measured by Dimesimeters being put close to the eye to measure individual light exposure.
The image was composed from 51 individual exposures, plus some extra ground-based photos.
The resulting negative is a composite of all the individual exposures.
There were indications that corporate officers may have confronted individual legal exposure, which is, by the way, never good for business.
The final color image was assembled from individual exposures taken through blue, green, and red filters.
But the study said that "because of limited information available on individual exposures, this finding is not scientifically conclusive."
By spreading share ownership, individual exposure is considerably reduced.
But individual exposures vary widely, and the average underestimates the danger for many individuals, he said.
So it is important to measure carefully the individual exposure, which ultimately goes into our models that predicts the risk of psychopathology.