Table 1:

Questionnaires used in the study.

Questionnaire	Description
Pediatric Pain Screening Tool (PPST)⁴⁸	Nine items in two domains- physical and psychosocial.Total score range 0 to 9. Physical subscale is focused on assessing presence of comorbid pain, functional ability and quality of life measures such as attending school, walking and sleep quality and psychosocial subscale is focused on assessing pain related fear, anxiety, catastrophizing, depression and pain inconvenience.
Child Anxiety Sensitivity Index (CASI)⁴⁷	18 items with total score range 18 to 54. Refers to the degree of child’s anxiety being associated with harmful somatic, psychological and social consequences such as “feeling like throwing up, going to faint, don’t want others to know that I’m scared.”
Functional Disability Index (FDI)⁵²	5-point Likert scale with total score range 0 to 60. 15-item scale that assesses the extent to which children experience difficulties in completing everyday specific tasks (e.g., walking to the bathroom, eating regular meals, being at school all day).⁵² Used in many pediatric populations, including children with chronic pain²⁶ and post-surgical pain.^{25; 32}
Pediatric Quality of Life measure (PedsQL)⁴⁹	23 items with total score range 0 to 92.Assess the child’s functional and mental status in the domains of health, activity, personal feelings, ability to get along with others and school problems.
NIH Patient-Reported Outcome Measurement Information System (PROMIS) Pediatric Short Form v2.0 Depressive Symptoms 8a³⁶	8 items with total raw score range 8–40 which is converted into a T score based on a table. T score of 50 is average for US populations. Eight -item short form which assesses self-reported negative mood (sadness, guilt), views of self (self-criticism, worthlessness), social cognition (loneliness, interpersonal alienation), and decreased positive affect. Validated in 8–17 year olds, and absence of suicidal intent assessment, obviates responsibilities beyond the scope of the study.^{8; 24}
PROMIS Pediatric SF v2.0 Pain Interference 8a	Eight items uilizing a 7–day recall period. total score range 8–40. Assesses the consequences of pain in daily activities of life in social, cognitive, emotional and physical activities. Measures self-reported consequences of pain on relevant aspects of a person’s life and may include the extent to which pain hinders engagement with social, cognitive, emotional, physical, and recreational activities. Validated for ages>7 year old.¹
PainDETECT¹¹	Seven questions and visual chart to mark area of pain and radiation. Total score range 0 to 38; score > 19 indicates likely neuropathic component. Reliable screening tool for neuropathic pain, with high sensitivity, specificity and positive predictive accuracy in chronic pain conditions -
Insomnia Severity Index (ISI)³⁰	7 questions designed to assess the nature, severity, and impact of insomnia, and monitor treatment response³⁰; Severity of sleep onset, sleep maintenance and early morning wakening problems, sleep dissatisfaction, interference of sleep difficulties with daytime functioning, noticeability of sleep problems by others, distress caused by the sleep difficulties; cutoff score of 10 had a 86.1% sensitivity and 87.7% specificity for detecting insomnia cases; High internal consistency (Cronbach α of 0.90)

NIH: National Institutes of Health; PROMIS: Patient-Reported Outcomes Measurement Information System All questionnaires used in this study are approved for use in children ≥ 8 years of age and have been validated in previous studies for test-retest reliability.