“…Study methodologies differed in terms of questionnaire format, timing of questionnaire completion and mode of questionnaire administration. Questionnaire formats included 5-point rating scales (20,22,25,27) and Likert scales (21,24,26,27), binary 'Yes/No' responses (20) and 100 mm visual analogue scales (23). In two studies (20,21), the degree of pain during the procedure was assessed using either a 4-or 7-point rating scale.…”