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“Were Women Studied?” audit

SURMOUNT-1 (NCT04184622) and the broader SURMOUNT program

Women were enrolled in large numbers in the tirzepatide obesity development program, but interpretable sex-specific analyses and life-stage denominators remain limited.

R1

Representation grade

Target population represented

S3

Sex-analysis grade

Post hoc / exploratory

R1
Representation level

Target population represented with useful denominator detail

Basis: SURMOUNT-1 enrolled 2,539 participants and roughly 67.5% were female, reflecting the higher enrollment of women commonly seen in obesity trials.

S3
Sex-analysis level

Post hoc/exploratory subgroup analysis

Population and enrollment

Enrollment breakdown

Terminology in source: Published trial reports and FDA reviews describe 'sex' (female/male).

0.0%

women / female participants

0 of 0 enrolled

Women (1,714)
Other (825)

Population definition

Adults with obesity or overweight without diabetes and with at least one weight-related comorbidity.

Age distribution

—

Inclusion and exclusion by life stage

Pregnancy exclusion

—

Lactation exclusion

—

Reproductive-potential requirements

—

Age/life-stage data

—

Sex-analysis plan and findings

Prespecified sex analysis

Yes

Powered for sex analysis

No / unclear

Interaction test reported

Yes

Efficacy by sex

The FDA statistical review reported a significant treatment-by-sex interaction in SURMOUNT-1, with greater average weight reduction in females. Both sexes outperformed placebo (quantitative interaction).

Safety by sex

Sex-specific safety rates are reported in regulatory documents, but subgroup precision is limited.

PK by sex

—

Missing data and generalizability limits

Menopausal status, contraceptive use, and menstrual-cycle phase are not consistently reported.

Pregnancy, lactation, and significant renal/hepatic disease were exclusion criteria; findings may not generalize to those groups.

Sources

Primary records

Medical reviewer

Medical Reviewer (Pending Assignment)

Medical review pending assignment by a licensed clinician.

Last reviewed 2026-08-01Next review 2026-11-01

Medical disclaimer: Her Health Peptides publishes educational, source-linked summaries. We do not provide individualized medical advice, diagnosis, or treatment recommendations. Always talk with a licensed clinician about your specific situation, especially if you are pregnant, breastfeeding, planning pregnancy, or taking other medicines.

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