Word: cohorts
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...turned out that among a select cohort of American military personnel who had been followed over decades, the roughly 1,200 carriers of the trait, all of whom were African-American, were 40% more likely after adjustments to be infected with HIV than noncarriers. From that sample, Weiss and his colleagues extrapolated the infection risk attributable to the gene variant in Africa, where a 40% increased susceptibility to infection translates to about 11% of all infections...
...boulevards and glass high-rises, Changsha - China's 19th largest metropolis - is immersed in the din of construction and the grey pallet of soot and smoke common to the cities of a booming China. Mao Ce's city is a rough and tumble place, and he and his cohort occupy a unique place in modern Chinese history. Products of China's vigorously enforced one-child policy, twenty-somethings like Mao feel that they've been left to shoulder the mistakes of their government even as they adapt to a society that is transforming at an overwhelming pace. Having missed...
...high school students has fallen dramatically. The Monitoring the Future surveys conducted by the University of Michigan show that in 1991, 81% of eighth-, 10th- and 12th-graders had had at least one drink in their lives; by last year, the figure was only 58%. Roughly 47% of this cohort had been drunk at least once in 1991; in 2007 only 38% had ever been drunk. On college campuses, meanwhile, the ranks of nondrinkers are rising steadily. In 1980 only 18% of college students surveyed for Monitoring the Future said they had not had a drink in the past month...
...right. But increasingly, the same deadly mix of problems is appearing in a startlingly younger population: teens and adolescents barely through their second decade of life. While the obesity epidemic is starting to show signs of waning, doctors are bracing for the more lasting legacy it leaves behind--a cohort of kids who are getting sick earlier or, at the very least, are a whole lot likelier to develop serious problems later. "We are seeing conditions that we as pediatricians are not used to seeing in children," says Dr. Seema Kumar of the Mayo Clinic in Rochester, Minn...
...Patterns of civic engagement among young Americans do remain to some extent divided between this new cohort willing to bet on traditional politics to bring change, and those who prefer non-political engagement through volunteering, community service, and education work. Yet both are proven options, and both are far more effective than street theatre, or simple indignation. Today’s young people appear to have learned, from someone, that results matter. So, graduates from the past: take a lesson from the Class...