Each separate model specified the total alive population as the reference category.
Again, all-cause mortality, cardiovascular mortality, and noncardiovascular mortality, defined by underlying cause of death, were modeled separately, using the total alive population as the reference category.
To obtain the most parsimonious model (defined as the best prediction model with the least number of variables), we used stepwise Cox proportional hazards models to model all-cause, cardiovascular, and noncardiovascular mortality separately, again with each compared with the total alive population.
Europeans keep their brown bear populations alive in many countries by feeding them.
However, a few "lucky" organisms that are known to be extinct in the wild still have decent populations alive elsewhere in the world.
Or any one of half a dozen regional, usually traditional, ways of eating that have been credited with keeping an improbable proportion of their populations alive beyond the age of 100.
They figure prominently in the diets of the healthiest populations alive today.
The regular Sudan Armed Forces and the regime's primary Arab militia force (the Rapid Support Forces, or RSF--a "new Janjaweed") are utterly unconstrained, having been given orders by regime Second Vice President Hassabo Mohamed Abdel Rahman to leave none of the African tribal populations alive in this part of Darfur.
Consequently, the higher the percentage of a population dedicated to simply keeping the population alive, the lower the overall growth rate of productivity.
An arbitrary starting abundance of 300 dolphins was chosen to ensure that sufficient dolphins were still alive in the population after 100 years, when the population growth rate was less than unity.
