Table 1.

Overview of Quantitative Measures.

Primary Outcomes	Part 1 Study	Part 2 Study	Pre-treatment sample size	Mid-treatment sample sizea	Post-treatment sample sizeb
Primary Outcomes
NIAS	X	X	14	10	11
PAGI-SYM c	X	X	13	8	11
VSI	X	X	14	9	11
Weight	X	X	10	10	9
Secondary Outcomes
PARDI-ARQ		X	5	5	4
SF-NDI Quality of Life		X	5	5	4
PAGI-QOL		X	5	5	4
Fear of Food Questionnaire		X	5	5	4
Food Neophobia Scale		X	5	5	4

Note.NIAS=Nine Item AFRID Screen; PAGI-SYM=Patient Assessment of Gastrointestinal Disorders Symptom Severity Index; VSI=Visceral Sensitivity Index; ARFID=Avoidant/Restrictive Food Intake Disorder; GI=gastrointestinal; PARDI=Pica, ARFID, and Rumination Disorder Interview; SF-NDI=Short Form Nepean Dyspepsia Index; PAGI-QOL=Patient Assessment of Upper Gastrointestinal Disorders Quality of Life.

^aMissing mid-treatment data for the NIAS, PAGI-SYM, and VSI if they were not administered at mid-treatment in clinical care (in Part 1 retrospective study).

^bMissing data for n=1 because the participant dropped out of treatment at Session 4 (in Part 2 observational prospective study) and n=2 participants because the NIAS, PAGI-SYM, and VSI were not administered in clinical care (in Part 1 retrospective study).

^cMissing data n=1 participant because the PAGI-SYM was not administered in clinical care (in Part 1 retrospective study).