The researchers compared the prevalence of lifetime suicide attempts in 318 subjects—68 with anorexia nervosa who purged,
104 with anorexia nervosa who did not purge, and 146 matched controls. They found that none of the controls had attempted
suicide, compared with 9 percent of the nonpurging anorexia subjects and 25 percent of the purging anorexia subjects. These
were significant differences. Thus, individuals who had anorexia and who purged were about three times more likely to attempt
suicide than individuals who had anorexia but did not purge.