Design: Pragmatic, comparative-effectiveness randomised clinical trial with blinded assessors
Population: 730 children aged 6–15 with obesity and a parent, in 41 US primary care practices
Primary outcome: Change in percent median BMI at 12 months
Effect: −6.4 vs −2.6 units; difference −3.8 (−6.20 to −1.34)

TEAM UP, a pragmatic comparative-effectiveness trial in 41 US primary care practices published in JAMA Pediatrics on 1 October, randomised 730 children aged 6 to 15 with obesity and a parent. Both groups received enhanced standard care led by their primary care clinician, intensified if the child did not respond. One group also had sessions with a family-based behavioural treatment interventionist, covering eating, activity, positive parenting and home environment.

At 12 months, percent median BMI fell by 6.4 units with the added family-based treatment and 2.6 units with enhanced care alone, a difference of 3.8 units. Weight-related quality of life improved more with the family-based programme. There were no adverse events from taking part. Nearly half the families had Medicaid and a fifth had food insecurity.

The practical shift is that obesity treatment in childhood works best with a parent in the room and a structured programme behind the clinician, not advice alone. Primary care can deliver it with a trained interventionist rather than referral to a distant specialist clinic.

In India, where paediatric weight services are scarce, the principle of engaging the parent as the agent of change is transferable even where the full programme is not.

Involve a parent in every child obesity consultation; the family is the unit of treatment.
Set specific eating, activity and screen-time goals with the family, not the child alone.
Use positive parenting strategies rather than restriction or blame.
Review the child regularly and intensify if BMI does not fall.
Ask about food insecurity, which affected a fifth of families in this trial.

Why it matters

It shows family-based treatment can be delivered in ordinary primary care and adds measurably to usual efforts.

The statistics, in plain English

Percent median BMI expresses a child's BMI relative to the median for age and sex. A between-group difference of −3.8 units (95% CI −6.20 to −1.34) is modest but clearly better than enhanced care alone. Whether the BMI difference lasts after treatment ends is the next question.