Reliability and validity of the training satisfaction questionnaire for family members (TSQ-FM) entering the ICU during an isolation disease outbreak

•All contact and airborne diseases result in the construction of barriers in ICUs to prevent any infectious risk for family members by entering an isolated ICU, going against family-centered care (FCC) principles.•The training satisfaction questionnaire – family members may help ICU nurses – as skill facilitator, to implement streamlined care pathways to guarantee to family members to remain safe during the visit in the isolated ICU and avoid any risk to be infected themselves as they engage to their hospitalized loved ones.•The training satisfaction questionnaire – family members is a valid and reliable instrument to assess the training satisfaction with the PPE donning and doffing procedures in an isolated ICU and it is an essential instrument for clinical practice to define a safe, effective and quality care pathway focused on FCC principles. The presence of family members in an isolated ICU during an isolation disease outbreak is restricted by hospital policies because of the infectious risk. This can be overcome by conferring to family members the skill and the ability to safely don and doff the personal protective equipment (PPE) through a nurse-led training intervention and assess their satisfaction, to respond to the need to define a safe, effective and quality care pathway focused on Family-Centered Care (FCC) principles. the study aimed to build a valid and reliable instrument for clinical practice to assess family members’ satisfaction to allow ICU nurses to restore family integrity in any case of infectious disease outbreak that requires isolation. A cross-sectional study was conducted to test the psychometric properties. The questionnaire was constructed based on a literature review on the needs of family members in the ICU. 76 family members were admitted to a COVID-ICU. Cronbach's coefficient, Geomin rotated loading, and EFA were applied to assess the reliability and validity of the instrument. The Kaiser-Mayer-Olkin (KMO) measure was 0.662, the Bartlett sphericity test showed a significant p-value (χ²=448.33; df=45; p < 0.01), Cronbach's alpha coefficient was.896. A further CFA analysis confirmed that all fit indices were acceptable. The results showed satisfactory validity and reliability, which could be generalized and extended to any outbreak of isolation disease. This study provides a valid and reliable instrument for clinical practice to maintain family integrity in the dyadic relationship between the patient and the family member, eve