Confirming the Efficacy/Mechanism of Family Therapy for Children With Low Weight ARFID

The Pica, ARFID, Rumination Disorder Interview (PARDI) is a semi-structured interview designed to diagnose and evaluate symptom severity of Avoidant/Restrictive Food Intake Disorder (ARFID). Parents reported on their child's behavior using the PARDI. The severity score is comprised of 17 items on a 7 point scale (for an overall score range of 0 to 6), where greater scores indicate greater ARFID symptom severity.

The Therapy Suitability and Patient Expectancy Scale is a measure with two subscales (Suitability and Success) and 2 items on 11 point scale (for an overall score of 0 to 10 on each subscale) that measures perceptions of the suitability and expectancy of the treatment provided and will be rated by parents. Higher scores on the subscales indicates greater perceptions of suitability and success. There is no TSPE total score.

The Parenting Style Questionnaire is a 30 item 6 point validated measure of parenting style related to authoritative, authoritarian, and permissive style. This questionnaire is divided up into three subscales: authoritative (13 questions), authoritarian (13 questions), and permissive (4 questions). Each question was rated on a scale of 1 to 6. Item scores in each subscale were summed and averaged to create the subscale score (range: 1 to 6). For all question and subscale scores, greater scores suggest the more preferred parenting style. This questionnaire will be completed by parents/caregivers.

The Center for Epidemiological Studies Depression Scale for Children is a 20-item 4 point self-report scale (for an overall score range of 0 to 60) that measures child depression, with higher scores suggesting greater depressive symptoms.

The Revised Children's Manifest Anxiety Scale Short is a 10 item 2 point scale (for an overall score range of 0 to 10) and is a validated measure of childhood anxiety and will be completed by children, with higher scores suggesting greater anxiety symptoms.

The HAQ is an 11-item survey, each item scored on a 6 point scale (scores of -3, -2, -1, 1, 2, 3). This questionnaire measures the quality of the therapist-patient relationship. The form is divided up into two subscales: Helpfulness (5 questions for an score range of -15 to 15) and Cooperation (6 questions for a score range of -18 to 18). For each subscale, higher scores correspond to a more positive relationship and perception of the therapist's helpfulness and cooperation. The HAQ will be completed by parents/caregivers.

The Schedule for Affective Disorders and Schizophrenia for School-Aged Children (K-SADS) is a widely used semi-structured interview detecting psychiatric disorders in children and adolescents. The individual items are scored on a 0 to 3 point rating scale, with scores of a 3 representing threshold criteria that leads to an additional diagnostic supplement based on the Diagnostic and Statistical Manual of Mental Disorders-5 (DSM-5) criteria evidence of the disorder. The K-SADS was administered to ascertain co-morbid psychiatric diagnoses prior to starting treatment.

The Strengths and Difficulties Questionnaire assesses conduct, social, and peer behaviors consists of 25 items (questions) each rated on a scale from 0 to 2. The SDQ has with 5 subscales (emotional symptoms, conduct problems, hyperactivity/inattention, peer relationship, and prosocial behavior). Each subscale consists of 5 questions resulting in a subscale score range of 0-10 (higher scores scores correspond to greater difficulties, except for prosocial behavior, where higher scores correspond to fewer difficulties). The total difficulties score is generated by summing scores from all the subscales except prosocial behavior, to create an overall score range of 0-40, where higher scores mean greater difficulties.

The Beck Depression Inventory (BDI) is a 21-item, self-report rating inventory that measures characteristic attitudes and symptoms of depression on a 4-point scale (overall scores ranging from 0 to 63). This measure also includes questions about suicidal ideation and intent. Higher scores suggest greater depressive symptoms.

The Beck Anxiety Inventory consists of 21 self-reported items assessing a participant's anxiety symptoms on a 4-point (0 to 3) scale (for an overall score range of 0 to 63), where higher scores suggests greater anxiety symptoms.

The 36-Item Short Form is a 36 item scale and is a general measure of physical and mental health functioning. This form is divided up into 8 subscales: vitality (4 questions), physical functioning (10 questions), bodily pain (2 questions), general health perceptions (5 questions), physical role functioning (4 questions), emotional role functioning (3 questions), social role functioning (2 questions), and mental health (5 questions). 1 question is not included in subscale scoring. The questions range between 2 and 6 points (1 to 2, 1 to 3, 1 to 5, and 1 to 6) and then are each re-coded (scale of 0 to 100), summed, and averaged to create the subscale score (score range of 0 to 100). For all subscales scores, greater scores suggest less disability. This assessment will be taken by the parents/caregivers.

Bandura's General Self-Efficacy Scale is a 10-item 4 point self-report scale (for an overall score range of 10 to 40) of general self-efficacy, where higher scores mean higher self-efficacy. This measure was completed by parents for their general self-efficacy score.

The Parenting Sense of Competence Scale contains 17 items measuring a participant's sense of competence in their parenting skills and as a parent of a child on a 6 scale (for an overall score range of 17 to 102), with higher scores meaning greater parental efficacy.