Pediatric Obesity: Surgical Eligibility Screener
Step-by-step checklist to determine if a child with obesity is a candidate for bariatric surgery and to guide the pre-referral workup and shared decision-making conversation.
Based on CMAJ 2025 Clinical Practice Guideline (Ball et al., doi: 10.1503/cmaj.241456).
Step 1 — Basic Eligibility Criteria
| Criterion |
Threshold |
| Age |
≥ 13 years (evidence base is exclusively ≥13) |
| Obesity severity |
Severe obesity confirmed by comprehensive health assessment |
| Multidisciplinary team |
Assessment by a specialized multidisciplinary team is required |
| Setting |
Surgical centre with paediatric bariatric program |
⚠️ Surgery does not require prior failure of pharmacotherapy. Offer based on clinical severity, family preference, comorbidities, and centre availability — not as a last resort after exhausting all other options.
⚠️ Centres performing bariatric surgery in adolescents are limited in Canada. Check availability in your region before raising expectations with the family.
Step 2 — Comprehensive Health Assessment (4Ms)
Assess all four domains before referral:
Metabolic
- Insulin resistance / type 2 diabetes
- Dyslipidaemia (↑TG, ↓HDL-C, ↑LDL-C)
- Hypertension
- Non-alcoholic fatty liver disease (↑ALT)
- Obstructive sleep apnea (consider sleep study)
Mechanical
- Musculoskeletal pain (knees, back, hips)
- Mobility limitations
- Exercise tolerance
Mental Health (critical — do not skip)
- Depression and anxiety screening
- Eating disorder screen (binge eating disorder, atypical anorexia, purging) — psychiatric clearance required before surgery
- Body image and self-esteem
- Bullying history
- Caregiver mental health
Social Milieu
- Family support and stability
- Food security
- Housing and neighbourhood safety
- Caregiver ability to support post-operative recovery and behavioural changes
- School and peer environment
Step 3 — Pre-Operative Multidisciplinary Assessment
The following specialists should be involved (where available):
| Specialist |
Role |
| Paediatric surgeon / bariatric surgeon |
Surgical planning, risk stratification |
| Paediatrician / obesity medicine physician |
Overall obesity management |
| Dietitian |
Pre- and post-operative nutritional counselling |
| Psychologist / psychiatrist |
Mental health clearance, body image, eating disorder screen |
| Social worker |
Social support, family stability, access to follow-up |
| Kinesiologist (where available) |
Physical activity readiness |
Step 4 — Surgical Options
Both options are conditional recommendations, low to moderate certainty. Both require concurrent behavioural and psychological interventions.
Laparoscopic Sleeve Gastrectomy (LSG)
- HRQoL: very large effect (critically important outcome)
- Weight and BMI: substantial reduction (very important outcome)
- Anxiety and depression: no data available
- Serious AEs: higher incidence than non-surgical comparators (important — discuss explicitly)
- Mild-moderate AEs: higher incidence (nausea, vomiting, reflux)
Roux-en-Y Gastric Bypass (RYGB)
- HRQoL: large effect
- Anxiety and depression: small effect (beneficial)
- Weight and BMI: substantial reduction
- Serious AEs: higher incidence than non-surgical comparators (important — discuss explicitly)
- Mild-moderate AEs: higher incidence
- Higher technical complexity; nutritional monitoring more intensive
Which to choose? The guideline does not mandate one over the other — choice depends on surgical expertise, anatomical factors, patient preference, and centre experience.
Step 5 — Shared Decision-Making Conversation
Before referral or consent, cover explicitly:
- Expected benefits: Large improvements in HRQoL and substantial weight/BMI reduction; cardiometabolic improvements likely
- Serious AE risk: Higher than non-surgical management — must be disclosed; includes complications requiring hospitalisation
- Lifestyle commitment: Surgery requires lifelong dietary changes, vitamin supplementation, and behavioural support
- No guarantee of sustained weight loss without maintained behavioural changes
- Alternatives: Confirm family has considered pharmacotherapy and intensified behavioural intervention
- Family/caregiver support: Post-operative period requires strong family engagement
Involve both the child and caregivers. The child's own voice matters — especially for adolescents.
Step 6 — Post-Operative Monitoring
Minimum monitoring plan after surgery:
| Timepoint |
What to monitor |
| 1–3 months |
Wound healing, GI tolerance, nutritional status, weight |
| 6 months |
BMIz, cardiometabolic markers, mental health screen, eating behaviours |
| 12 months |
HRQoL, nutritional deficiencies (iron, B12, vitamin D, calcium), weight trajectory |
| Ongoing |
Annual metabolic screen; eating disorder vigilance; transition to adult care planning |
Clinical Guardrails
- Eating disorder is a relative contraindication — psychiatric clearance is mandatory. Active binge eating disorder requires treatment before surgery.
- Age < 13: Do not refer — evidence was derived exclusively from ≥13-year-olds.
- Technology-only interventions are insufficient as a pre-operative behavioural program — ensure a proper multicomponent program is in place.
- Ongoing behavioural/psychological support post-operatively is required — surgery alone is not adequate management.
- Transition planning: Begin discussing adult care transition from the time of surgery, especially for 16+ year-olds.
- Lipase inhibitors: Not a surgical alternative — do not substitute.
Source
CMAJ 2025 Clinical Practice Guideline: Managing obesity in children.
Ball GDC et al. CMAJ 2025 April 14; 197:E372–89. doi: 10.1503/cmaj.241456
Updated version: June 3, 2025.
1---2name: pediatric-obesity-surgical-screener3description: Screen a child aged 13+ with obesity for eligibility for bariatric surgery (laparoscopic sleeve gastrectomy or Roux-en-Y gastric bypass) using the CMAJ 2025 guideline. Trigger when a clinician asks whether a child qualifies for weight loss surgery, bariatric surgery in adolescents, sleeve gastrectomy in a teenager, or when to refer for surgical management of pediatric obesity.4---56# Pediatric Obesity: Surgical Eligibility Screener78Step-by-step checklist to determine if a child with obesity is a candidate for bariatric surgery and to guide the pre-referral workup and shared decision-making conversation.910Based on CMAJ 2025 Clinical Practice Guideline (Ball et al., doi: 10.1503/cmaj.241456).1112---1314## Step 1 — Basic Eligibility Criteria1516| Criterion | Threshold |17|---|---|18| Age | ≥ 13 years (evidence base is exclusively ≥13) |19| Obesity severity | Severe obesity confirmed by comprehensive health assessment |20| Multidisciplinary team | Assessment by a **specialized multidisciplinary team** is required |21| Setting | Surgical centre with paediatric bariatric program |2223> ⚠️ **Surgery does not require prior failure of pharmacotherapy.** Offer based on clinical severity, family preference, comorbidities, and centre availability — not as a last resort after exhausting all other options.2425> ⚠️ **Centres performing bariatric surgery in adolescents are limited in Canada.** Check availability in your region before raising expectations with the family.2627---2829## Step 2 — Comprehensive Health Assessment (4Ms)3031Assess all four domains before referral:3233### Metabolic34- Insulin resistance / type 2 diabetes35- Dyslipidaemia (↑TG, ↓HDL-C, ↑LDL-C)36- Hypertension37- Non-alcoholic fatty liver disease (↑ALT)38- Obstructive sleep apnea (consider sleep study)3940### Mechanical41- Musculoskeletal pain (knees, back, hips)42- Mobility limitations43- Exercise tolerance4445### Mental Health *(critical — do not skip)*46- Depression and anxiety screening47- **Eating disorder screen** (binge eating disorder, atypical anorexia, purging) — **psychiatric clearance required before surgery**48- Body image and self-esteem49- Bullying history50- Caregiver mental health5152### Social Milieu53- Family support and stability54- Food security55- Housing and neighbourhood safety56- Caregiver ability to support post-operative recovery and behavioural changes57- School and peer environment5859---6061## Step 3 — Pre-Operative Multidisciplinary Assessment6263The following specialists should be involved (where available):6465| Specialist | Role |66|---|---|67| Paediatric surgeon / bariatric surgeon | Surgical planning, risk stratification |68| Paediatrician / obesity medicine physician | Overall obesity management |69| Dietitian | Pre- and post-operative nutritional counselling |70| Psychologist / psychiatrist | Mental health clearance, body image, eating disorder screen |71| Social worker | Social support, family stability, access to follow-up |72| Kinesiologist (where available) | Physical activity readiness |7374---7576## Step 4 — Surgical Options7778Both options are **conditional recommendations, low to moderate certainty.** Both require concurrent behavioural and psychological interventions.7980### Laparoscopic Sleeve Gastrectomy (LSG)81- HRQoL: **very large effect** (critically important outcome)82- Weight and BMI: **substantial reduction** (very important outcome)83- Anxiety and depression: **no data available**84- Serious AEs: **higher incidence than non-surgical comparators** (important — discuss explicitly)85- Mild-moderate AEs: higher incidence (nausea, vomiting, reflux)8687### Roux-en-Y Gastric Bypass (RYGB)88- HRQoL: **large effect**89- Anxiety and depression: **small effect** (beneficial)90- Weight and BMI: **substantial reduction**91- Serious AEs: **higher incidence than non-surgical comparators** (important — discuss explicitly)92- Mild-moderate AEs: higher incidence93- Higher technical complexity; nutritional monitoring more intensive9495**Which to choose?** The guideline does not mandate one over the other — choice depends on surgical expertise, anatomical factors, patient preference, and centre experience.9697---9899## Step 5 — Shared Decision-Making Conversation100101Before referral or consent, cover explicitly:1021031. **Expected benefits:** Large improvements in HRQoL and substantial weight/BMI reduction; cardiometabolic improvements likely1042. **Serious AE risk:** Higher than non-surgical management — must be disclosed; includes complications requiring hospitalisation1053. **Lifestyle commitment:** Surgery requires lifelong dietary changes, vitamin supplementation, and behavioural support1064. **No guarantee of sustained weight loss** without maintained behavioural changes1075. **Alternatives:** Confirm family has considered pharmacotherapy and intensified behavioural intervention1086. **Family/caregiver support:** Post-operative period requires strong family engagement109110> Involve both the child and caregivers. The child's own voice matters — especially for adolescents.111112---113114## Step 6 — Post-Operative Monitoring115116Minimum monitoring plan after surgery:117118| Timepoint | What to monitor |119|---|---|120| 1–3 months | Wound healing, GI tolerance, nutritional status, weight |121| 6 months | BMIz, cardiometabolic markers, mental health screen, eating behaviours |122| 12 months | HRQoL, nutritional deficiencies (iron, B12, vitamin D, calcium), weight trajectory |123| Ongoing | Annual metabolic screen; eating disorder vigilance; transition to adult care planning |124125---126127## Clinical Guardrails128129- **Eating disorder is a relative contraindication** — psychiatric clearance is mandatory. Active binge eating disorder requires treatment before surgery.130- **Age < 13:** Do not refer — evidence was derived exclusively from ≥13-year-olds.131- **Technology-only interventions are insufficient** as a pre-operative behavioural program — ensure a proper multicomponent program is in place.132- **Ongoing behavioural/psychological support post-operatively is required** — surgery alone is not adequate management.133- **Transition planning:** Begin discussing adult care transition from the time of surgery, especially for 16+ year-olds.134- **Lipase inhibitors:** Not a surgical alternative — do not substitute.135136---137138## Source139140CMAJ 2025 Clinical Practice Guideline: *Managing obesity in children.*141Ball GDC et al. CMAJ 2025 April 14; 197:E372–89. doi: [10.1503/cmaj.241456](https://doi.org/10.1503/cmaj.241456)142Updated version: June 3, 2025.
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