... Most of them used a biopsy [ The studies included in this review used four different tools to evaluate GFDs: BIAGI scores [26], the Coeliac Dietary Adherence Test (CDAT) [19], self-report questionnaires, and interviews. Most of them used a biopsy [9,18,20,26,27,29,32,[34][35][36][37][38][40][41][42]45,47,49,52] (n = 19; 59.3%), followed by serology [12,18,[26][27][28]30,31,33,36,39,43,44,51,53] (n = 14; 43.7%) and GIPs [9,46,48,50] (n = 4; 12.5%). Of the 32 studies, most (n = 45; 46.8%) used the self-report method to evaluate GFD adherence [27,30,32,34,36,38,39,41,[43][44][45]47,[51][52][53], followed by the CDAT [9,12,20,40,46,[48][49][50] (n = 8; 25%), BIAGI [18,26,31,33,40] (n = 5; 15.6%), and interviews [28,29,37,42] (n = 4; 12.5%), while only one used the Standardized Dietitian Evaluation (SDE) [20] and one of the studies used both the BIAGI and CDAT tools [35]. ...