Obesity

People With Lowest Physical Functioning Scores Showed Greatest Improvement After Tirzepatide Treatment

Obesity (Silver Spring)Published Post hoc analysis of the SURMOUNT randomised trials

Authors' conclusion

Lower baseline PF was associated with a higher prevalence of ORCs. Patients taking tirzepatide experienced substantial weight loss, regardless of their baseline PF. Tirzepatide may improve PF through both weight loss-dependent and -independent mechanisms, especially in those with lower baseline PF.

Study context

Population
Participants of SURMOUNT-1 (2539), SURMOUNT-3 (579) and SURMOUNT-4 (670) trials of tirzepatide in obesity3 SURMOUNT trials
Comparison
Baseline physical function (PF) quartiles among tirzepatide-treated participants
Methodological detailsgrouped by baseline quartiles of SF-36v2 PF scores, ANCOVA
  • Grouped by baseline quartiles of SF-36v2 PF scores
  • ANCOVA

Primary result

As reported in the abstract

Change from baseline in PF with tirzepatide by baseline PF quartile (SURMOUNT-1)

Q1

12.5

Q4

−0.8

Further findings

Obesity-related complications (ORCs) by baseline PF (SURMOUNT-1)

Lower baseline PF had more ORCs

Weight, waist circumference and BMI reductions with tirzepatide across quartiles (SURMOUNT-1)

Weight reduction (kg), range across quartiles
−20.1% to −22.8%
Waist circumference reduction, range across quartiles
−17.2 to −20.2 cm
BMI reduction, range across quartiles
−7.2 to −9.0 kg/m²
Reductions similar across quartiles

Correlation between weight reduction and PF improvement

Weak to mild correlation; strength decreased from Q1 to Q4

Parts of this Brief are withheld: the automatic checks could not confirm them against the abstract.

Original publication

People With Lowest Physical Functioning Scores Showed Greatest Improvement After Tirzepatide Treatment. Obesity (Silver Spring). Published 4 November 2025. doi:10.1002/oby.70067

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