“…Fifteen studies have used the Cleveland Constipation Score (CCS) (17, 18, 21, 28, 39-41, 43, 45, 46, 48-50, 53, 54). Altomare-score, Longo-score, and the obstructed defecation syndrome-score (ODS-score), or a self-reported or modified ODS-score (S-ODS or M-ODS) were also used in three (23,38,46) seven (39,40,43,46,47,52,53) and eight studies (24,26,30,37,42,49,50,51) respectively (Table 3). An overview of the instruments (scoring system) is presented in Table 2.…”