The therapeutic alliance has demonstrated an association with favorable psychotherapeutic outcomes in the treatment of eating disorders (EDs). However, questions remain about the interrelationships between early alliance, early symptom improvement, and treatment outcome. We conducted a meta-analysis on the relations among these constructs, and possible moderators of these relations, in psychosocial treatments for EDs. Twenty studies met inclusion criteria and supplied sufficient supplementary data. Results revealed small-to-moderate effect sizes, bs 5 0.13 to 0.22 (p < .05), indicating that early symptom improvement was related to subsequent alliance quality and that alliance ratings also were related to subsequent symptom reduction. The relationship between early alliance and treatment outcome was partially accounted for by early symptom improvement. With regard to moderators, early alliance showed weaker associations with outcome in therapies with a strong behavioral component relative to nonbehavioral therapies.However, alliance showed stronger relations to outcome for younger (vs. older) patients, over and above the variance shared with early symptom improvement. In sum, early symptom reduction enhances therapeutic alliance and treatment outcome in EDs, but early alliance may require specific attention for younger patients and for those receiving nonbehaviorally oriented treatments.Resumen: Objetivo: La alianza terap eutica entre paciente y terapeuta ha demostrado ser una relaci on con resultados psicoterap euticos favorables en el tratamiento de los trastornos de la conducta alimentaria (TCA). Sin embargo, quedan preguntas acerca de la inter-relaci on entre alianza temprana, mejoría temprana de síntomas y resultados del tratamiento. Hicimos un meta-an alisis de la relaci on entre estos constructos y los posibles moderadores de estas relaciones en los tratamientos psicosociales para TCA. M etodo: Veinti un estudios reunieron los criterios de inclusi on y aportaron suficientes datos suplementarios. Resultados: los resultados revelaron un efecto de la talla pequeño a moderado, b 5 0.13 a 0.22 (p < .05), encontrando que la mejoría temprana de los síntomas estuvo relacionada con la subsecuente calidad de la alianza y las calificaciones de la alianza tambi en estuvieron relacionadas con la subsecuente reducci on de los síntomas. La relaci on entre alianza temprana y resultados de tratamiento fue parcialmente explicada por la temprana mejoría de los síntomas. Con relaci on a los moderadores, la alianza temprana mostr o d ebiles asociaciones con el resultado en terapias con un fuerte componente conductual relativo a terapias no conductuales. Sin embargo, la alianza mostr o m as fuerte relaci on con los resultados para pacientes m as j ovenes (versus mayores), por encima y sobre la varianza compartida con la temprana mejoría de síntomas. Discusi on: En resumen, la reducci on temprana de los síntomas refuerza la alianza terap eutica y los resultados del tratamiento en TCA, pero la alianza temprana puede reque...

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BackgroundDifferential Item Functioning (DIF) is investigated to ensure that each item displays a consistent pattern of responses irrespective of the characteristics of the respondents. Assessing DIF helps to understand the nature of instruments, to assess the quality of a measure and to interpret results. This study aimed to examine whether the items of the Quality of Life Enjoyment and Satisfaction Questionnaire-Short Form (Q-LES-Q-SF) and Short-Form 12 (SF-12) exhibit DIF.MethodA total of 124 outpatients diagnosed with substance dependence participated in a cross-sectional, multicenter study. In addition to the Q-LES-Q-SF and SF-12 results, demographic data such as age, sex, type of substance dependence and education level were collected. Rasch analysis was conducted (using RUMM2020 software) to assess DIF of the Q-LES-Q-SF and SF-12 items.ResultsFor SF-12, significant age-related uniform DIF was found in two of the 12 items, and sex-related DIF was found in one of the 12 items. All of the observed DIF effects in SF-12 were found among the mental health items. Three items showed DIF on the Q-LES-Q-SF; however, the impact of DIF item on the delta score calculation for the comparisons of self-reported health status between the groups was minimal in the SF-12 and small in the Q-LES-Q-SF.ConclusionThese results indicated that no major measurement bias affects the validity of the self-reported health status assessed using the Q-LES-Q-SF or SF-12. Thus, these questionnaires are largely robust measures of self-reported health status among substance users.