1919 — Arthur Reed Perry (for the U. S. Department of Labor Bureau of Labor Statistics), Preventable Death in Cotton Manufacturing Industry, page 130:
Even with the parturition factor eliminated, however, married operatives in each of the two younger 10-year age groups are about twice as liable to die from all nonparturition causes as single operatives of the same groups, while in the third decade they are about half again as liable as the single to die from all nonparturition causes.
The associations estimated for the nonparturition variables were essentially the same in both models; therefore the associations from nonparturition are reported for the nonparturition variables.
The female moose were prime aged and we assumed all individuals to be non-naïve because they ranged at least partly, i. e., during nonparturition time, within human proximity where cross-country skiing and other recreational activities are common.