Table 3. Population and validation details of the selected validation studies: Wexner Scale and Fecal Incontinence Quality of Life questionnaire.

Authors	Target population	Sample	Age (mean)
Fonseca et al 8	Patients from the urogynecology outpatient clinic	20 patients with AI for the cultural translation and adaptation 50 patients with AI for the validation	57.5 years old
Yusuf et al 9	Patients with AI from the physiology of the colon, rectum, and anus outpatient clinic	40 patients with AI for the cultural adaptation; 50 patients with AI for the reproducibility and construct validity; 30 patients with constipation and 30 healthy patients for the discriminative validity Total: 150 patients	52.8 years old
Authors	Reliability	Validity	Limitation
Fonseca et al 8	Cronbachs α = 0.932	Convergent validity and discriminant validity	The authors did not verify whether the order of application of the face-to-face interview/telephone interview affected the results. Lack of evidence of sensitivity to change. 7.2% of the patients were illiterate (could be considered a bias in favor of successful results.)
Yusuf et al 9	Intraexaminer and interexaminer reproducibility ranged from 0.929 to 0.957 and from 0.944 to 0.969, respectively (ICC)	Construct validity and discriminatory validity	In 22% of the cases, there were no results of the AII corresponding to the quality of life index (10% with a slight impact on the quality of life despite high AI/12% with moderate or mild AI), with great repercussions on QoL). 26% of the population was composed by men.

Abbreviations: AI, anal incontinence; AII, anal incontinence index; ICC, intraclass correlation coefficient; QoL, quality of life.