Cultural adaptation and psychometric properties of Brazilian Need for Recovery Scale.
OBJECTIVE
To translate the Need for Recovery Scale (NFR) into Brazilian Portuguese and culturally adapt it and assess the stability, internal consistency and convergent validity of the Brazilian scale among industrial workers.


METHODS
The translation process followed the guidelines for cultural adaptation of questionnaires including the steps of translation, synthesis, back translation, expert committee review, and pre-testing. The Brazilian Portuguese NFR, final version (Br-NFR) was assessed for stability (n=52) and internal consistency (n=192) and for convergent validity through simultaneous assessment with other instruments: the Borg Scale (n=59); the Chalder Fatigue Questionnaire (n=57) and 3 subscales of the SF-36 (n=56).


RESULTS
Stability and internal consistency met the criterion for a reliable measure (ICC=0.80 and Cronbach's alpha =0.87, respectively). The convergent validity between Br-NFR and other instruments also showed good results: Borg Scale (r= 0.64); Chalder Questionnaire (r= 0.67); SF-36 subscales: vitality (r= -0.84), physical functioning (r= -0.54), and role-physical (r= -0.47).


CONCLUSIONS
The Br-NFR proved to be a reliable instrument to evaluate work-related fatigue symptoms in industrial workers. Furthermore, it showed significant and good correlations with well-established instruments such as the Borg Scale, the Chalder Questionnaire and SF-36 vitality subscale, supporting the validity of the Br-NFR.
Moriguchi
Cristiane Shinohara
CS
Centro de Ciências Biológicas e da Saúde, Universidade Federal de São Carlos, São Carlos, SP, Brasil.
Alem
Michele Elisabete Rubio
ME
van Veldhoven
Marc
M
Coury
Helenice Jane Cote Gil
HJ
D000328:Adult; D001938:Brazil; D003466:Cultural Characteristics; D005221:Fatigue / Q000175:diagnosis*; D005260:Female; D006801:Humans; D007221:Industry; D007802:Language; D008297:Male; D011594:Psychometrics; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires; D014175:Translating; D014938:Work Capacity Evaluation