Mortality and incidence data are reported separately by sex.
Therefore, we chose temperature as the target meteorological variable to be associated with headache incidence data.
Incidence data by race/ethnicity were compiled from research publications, federal cancer statistics, and cancer registries.
The first seven rows of Table 3 show estimates based on mortality and incidence data for both sexes combined.
Rows 15 21 of Table 3 show estimates based on mortality and incidence data for males only.
Our incidence data were based upon an estimated exposure denominator of six months per baby, similar to research elsewhere.
Rows 8 14 of Table 3 show estimates based on mortality and incidence data for females only.
"But that prediction was controversial, and at the time we did not have flu incidence data at the city level that could be used to see if the prediction was true," he tells me.
We know that breast cancer rates have increased dramatically since the 1930s, when the first reliable cancer incidence data were established, and that, strikingly, the increase parallels the proliferation of synthetic chemicals.
Our results correlated well with H1N1 incidence data.
This parallel route hypothesis has not been tested with age-specific incidence data.
