Pediatric Obesity Intervention Selector

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name: pediatric-obesity-intervention-selector
description: Select the right treatment tier for a child with obesity — behavioural, pharmacologic, or surgical — using the CMAJ 2025 pediatric obesity guideline. Trigger when a clinician asks what to do for a child with obesity, which intervention to start, whether to escalate treatment, or when to consider medication or surgery for pediatric obesity.
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# Pediatric Obesity: Intervention Selector

Step-by-step guide to selecting the appropriate intervention tier for a child (0–18 years) with obesity. Based on CMAJ 2025 Clinical Practice Guideline (Ball et al., doi: 10.1503/cmaj.241456).

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## Step 1 — Gather Key Information

Before recommending anything, confirm:

- **Age** (years)
- **BMI z-score (BMIz)** using WHO growth charts for Canada
- **What has already been tried** (duration, adherence, response)
- **Comorbidities** (metabolic, mechanical, mental health — see 4Ms below)
- **Family preferences and values** — what outcomes matter most to them?
- **Social determinants** (food security, neighbourhood, family dynamics)

> ⚠️ Use person-first, neutral language throughout. Say "child with obesity" not "obese child." Refer to BMI, weight, or growth — not "fat" or "overweight."

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## Step 2 — First-Line: Behavioural & Psychological Interventions

**All children with obesity, regardless of age.**
**Strong recommendation, very low to moderate certainty.**

Recommend a **multicomponent intervention** — must include at least 2 of:
- Physical activity
- Nutrition counselling
- Psychological support (e.g., CBT, motivational interviewing)
- Technology-assisted components (optional; weak evidence)

Individual components alone (nutrition-only, exercise-only) are **conditional** recommendations with weaker evidence — prefer multicomponent.

**Practical targets:**
- Higher-intensity sessions (aerobic + resistance training) superior to low-intensity
- Goal-setting, self-monitoring, problem-solving, and relapse prevention are effective behaviour change tools
- At least 26 hours of contact time improves outcomes
- Long-term support is essential — obesity is chronic and relapsing

**Technology interventions alone:** Neither for nor against (insufficient evidence).

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## Step 3 — Escalate to Pharmacotherapy?

**Consider if:** inadequate response to behavioural/psychological interventions **AND** age ≥ 12 years.

> ⚠️ No stepwise requirement — pharmacotherapy can be offered alongside, not only after, behavioural therapy. It must **always be combined** with behavioural/psychological interventions.

→ **Go to the Pharmacotherapy Selector skill** for agent selection.

If age < 12: insufficient evidence for any pharmacotherapy — do not prescribe.

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## Step 4 — Escalate to Surgery?

**Consider if:** age ≥ 13 years AND deemed eligible after **comprehensive multidisciplinary assessment.**

> ⚠️ Surgery does not require prior failure of pharmacotherapy. Consider based on severity, comorbidities, family preference, and centre availability.

Surgical options: Laparoscopic sleeve gastrectomy (LSG) or Roux-en-Y gastric bypass (RYGB). Both: conditional recommendation, low to moderate certainty.

**Requirements before referral:**
- Specialized, multidisciplinary team assessment
- Psychological/psychiatric clearance
- Nutritional assessment
- Family/caregiver involvement and support
- Shared decision-making about serious AE risk

→ **Go to the Surgical Eligibility Screener skill** for full checklist.

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## Step 5 — Shared Decision-Making at Every Tier

At every tier, the conversation matters as much as the prescription:

- Present **all options** (behavioural, pharmacologic, surgical) — no option should be withheld from discussion
- Acknowledge the **balance of benefits and harms** for each option
- Align on **what success looks like** — HRQoL, mood, mobility, not just BMI
- Involve **both child and caregiver** in the decision (separately if helpful)
- Address **social determinants** that may affect access or adherence
- Refer to multidisciplinary team **where available**

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## Clinical Guardrails

- **Eating disorder vigilance:** Ask about binge eating, body image concerns, atypical anorexia — especially before pharmacotherapy or surgery. Refer to specialist if suspected.
- **Don't focus solely on weight.** Improved HRQoL, depression, anxiety, and cardiometabolic markers are equally valid outcomes.
- **Obesity is not a personal failing.** Genetics, physiology, and environment drive it. Frame this clearly for families.
- **Lipase inhibitors (orlistat):** Suggested but not preferred — higher GI side effects and serious AE risk. Use only if GLP-1RA and metformin unavailable.
- **Technology-only interventions:** Insufficient evidence — do not use as a standalone strategy.

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## 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](https://doi.org/10.1503/cmaj.241456)
Updated version: June 3, 2025.