How many women worldwide are affected by intimate partner violence, according to a first-of-its-kind report released by the World Health Organization, the London School of Hygiene and Tropical Medicine, and the South African Medical Research Council.

1 million

Number of former smokers in the United States who started smoking again after 9/11, according to a study published in Contemporary Economic Policy.


How many stroke survivors suffer from post-traumatic stress disorder, according to a meta-analysis of nine studies published in PLoS One.