The aim of this study is to adapt and validate to the Spanish the European Quality Questionnaire (EuroQ2) to evaluate families' experiences of quality of care for critically ill and dying patients in the ICU.

The aim of this study is to adapt and validate a Spanish-language version of the European Quality Questionnaire (EuroQ2). Using a forward-backward translation methodology, we will translate the EuroQ2 into Spanish and will evaluate its psychometric characteristics in a clinical sample of 200 family members responsible for making medical decisions for patients who are discharged from the ICU or who died in the ICU. Cronbach's alpha values, confirmatory factor analysis (CFA) will be evaluated in order to know the reliability, construct validity, and convergent validity.

Inclusion Criteria:

• Family members of patients admitted to the ICU for 48 hours or more.
• Family members responsible for patient decision making in the ICU who consent participate.

Exclusion Criteria:

• Family members younger than 18 years,
• Family members not able to read or write Spanish

Family member or person responsible for patient decision making in the ICU