differential mortalities การใช้

Differential mortality of predators and hoppers does not appear to be the primary factor for insecticide-induced resurgence.
The result was their book, " Differential Mortality in the United States " ( Harvard University Press, 1973 ), which remains in print.
Differential mortality during the Holocaust and " posttraumatic growth " associated with protective factors in Holocaust survivors or in their environment after World War II were suggested as explanations for these findings.
Another possible contributory factor is an aging population, with a higher than normal proportion of relatively elderly people : we recall that due to higher differential mortality rates the ratio of males to females reduces for each year of age.
A recent review of the available scientific literature concluded that the apparent decrease in Alzheimer risk may be simply because smokers tend to die before reaching the age at which Alzheimer normally occurs . " Differential mortality is always likely to be a problem where there is a need to investigate the effects of smoking in a disorder with very low incidence rates before age 75 years, which is the case of Alzheimer's disease, " it stated, noting that smokers are only half as likely as non-smokers to survive to the age of 80.