Use of electronic cigarettes among U.S. Military service members - prevalence and associated risk factors.

Background: Decreased physical fitness, loss of vision and hearing, and increased risk of chronic diseases are significant primary and secondary implications associated with the health of U.S. Military Service members who use tobacco, including electronic cigarettes.

Incidence of psychiatric disorders after extended residence in Antarctica.

Objectives: The incidence of psychiatric disorders and depressive symptoms was examined in a cohort of American men and women who spent an austral winter at two different research stations in Antarctica to determine whether extended residence of nonindigenous inhabitants in a polar region is associated with psychiatric morbidity.

Study Design: Debriefings interviews with 220 men and 93 women were conducted by 3 psychiatrists and 1 clinical psychologist at McMurdo Station and South Pole Station at the end of the austral winter between 1994 and 1997. Crewmembers were assigned a DSM-IV diagnosis if they satisfied diagnostic criteria.