Effects of Method of Translation of Patient-Reported Health Outcome Questionnaires: A Randomized Study of the Translation of the Rheumatoid Arthritis Quality of Life (RAQoL) Instrument for Sweden.
ABSTRACT Aims: To compare two versions of a questionnaire translated using forward-backward (FB) translation and dual-panel (DP) methodologies regarding preference of wording and psychometric properties. Methods: The Rheumatoid Arthritis Quality of Life instrument was adapted into Swedish by two independent groups using FB and DP methodologies, respectively. Seven out of thirty resulting items wer