Reading focus
Syllabus: How Do Eating Disorders Develop and Persist?
Compare this study’s symptom-and-duration definition with the preceding recovery criteria, and trace who enters its denominator.
Why you’re reading it. Examine long-term change without assuming that recovery rates are interchangeable or individually predictive.
A question to consider. What information would be needed to estimate recovery under Bardone-Cone’s definition in this cohort, and which missing observations would remain a problem?
Why this reading
A short follow-up can mistake persistence so far for permanence. Eddy and colleagues revisit a clinical cohort after about two decades. The study makes both late recovery and changes in recovery status visible while showing why the denominator, outcome definition and missing observations matter to a prognosis.
Before you read
A cohort follows an identified group over time. Attrition means some participants are not observed at follow-up. Imputation estimates missing values under assumptions; it does not recover the missing observations themselves. A group’s recovery percentage can stay similar while individuals move into and out of recovery.
Read for
- Trace the original cohort, deaths, surviving participants and those who completed the later assessment.
- Examine the duration and symptom criteria required for recovery, including what the definition allows to remain.
- Compare the earlier and later assessments and identify the transitions that the long gap cannot reveal.
Consider afterwards
- How could an unchanged group recovery rate conceal substantial improvement and relapse among individuals?
- How would including deaths in a different outcome or denominator change the question answered by the reported recovery percentage?
Editorial context
The original cohort comprised 246 treatment-seeking women; 176 of 228 surviving participants completed the long-term assessment, and missing outcomes were imputed. The sample was predominantly White and cannot supply an individual prediction. The study’s recovery definition allows some cognitive symptoms and differs from definitions requiring psychological recovery. Treatment was not randomized, so these data cannot identify which treatment produced the observed course.