Brazilian-Portuguese version of the Friendship Scale to assess social isolation: cross-cultural adaptation and psychometric properties

Aim: To translate, cross-cultural adapt and investigate the measurement properties of 25-point Friendship Scale to Brazilian-Portuguese. Methods: Translation adaptation Brazilian-Portuguese was conducted at first. Then, new version administered 160 Brazilians test-retest reliability, internal consistency, standard error (SEM), minimal detectable change (MDC), ceiling floor effects, concurrent validity. validity, Brazilian–Portuguese 0-100 EuroQol Visual Analog (EQ VAS) used assess people’s self-reported health status. Results: The has good excellent reliability (ICC 0.76, 95% CI 0.61 – 0.85) had moderate consistency (Cronbach’s alpha value 0.78, CI: 0.73 0.83). avoid exceed variability, scores need be greater than 1.33 (SEM) 3.69 (MDC) on scale, respectively. There no effects. For there a small positive correlation between EQ VAS (Spearman rs = 0.24; p<0.01). Conclusions: acceptable people over 18 years old’s perception social isolation.