A lthough binge eating and purging were observed in women with anorexia nervosa, bulimia nervosa is a relatively recent addition to the medical literature, having been first described in 1979 (1). Consistent with the negative impact that binge eating and purging were observed to have on anorectic patients' outcome (2), bulimia nervosa was termed "an ominous variant of anorexia nervosa." This dire description was tempered with the recognition that "only a brief comment on the prognosis of bulimia nervosa is appropriate, for long-term follow-up studies have not been undertaken" (1). Now, more than 15 years later, little additional information seems available. A single study of 44 women diagnosed with bulimia nervosa 10 years earlier (3) provides the only available data on long-term outcome. Indeed, DSM-IV states, "The long-term outcome of Bulimia Nervosa is not known."Comparing and summarizing results across those outcome studies which do exist are complicated by methodological differences among and within studies. For example, one study (4) employed four different measures of eating disorder outcome in order to attribute differences in recovery estimates to the impact of assessment methods. That study found that the range of those considered recovered was 29% to 42%. Thus, inconsistent findings across studies may be partially attributed to differences in methods of assessment, as well as sample characteristics, definitions of terms, and ascertainment rates.The limited availability and comparability of research findings leave the following questions largely unanswered: What is the long-term physical, psychological, and psychosocial outcome among women diagnosed with bulimia nervosa? What percentage of women re-