This is the comparison the whole market is priced around, and the first thing to look at is not the result but the two doses somebody picked to produce it — because on this roster the dose is what the price is attached to.
What each drug was given at
Semaglutide at 1.7 mg a week. That is a real maintenance dose and it is one step below the 2.4 mg licensed for weight management. [1] Tirzepatide at 5 mg a week, which is the lowest of its three maintenance doses, with 10 and 15 mg above it.
So neither drug was at its ceiling, and they were not at matching points on their own ranges. A head-to-head is always a comparison of two chosen doses; this one chose a near-top dose of the drug that lost and the entry dose of the drug that won.
The result
Tirzepatide produced 2.87 kg more weight loss over three months, 95% CI 1.32 to 4.41, p < 0.001, along with greater reductions in total fat mass and visceral fat, and better insulin resistance measures.
The share reaching more than 10% body weight loss was 21.50 percentage points higher on tirzepatide, 95% CI 7.45 to 35.55, p = 0.003 — a gap between two proportions rather than a rate in its own right — a distinction worth holding onto, since a gap between proportions is the figure most often quoted as though it were one. Safety profiles were broadly similar.
What the design can carry
Three months, 183 people, one clinic, looked at retrospectively. Nobody was randomized, so whoever received which drug was placed there by a clinician for reasons the records do not capture.
It is also a single Chinese cohort, and neither body composition response nor prescribing practice is uniform across populations. The authors ask for larger and longer real-world studies before generalizing, which is the right request for a three-month before-and-after — the same limit as any comparison assembled from records rather than built by randomization.
What a buyer does with it
Note which doses won, and then check which doses you are being quoted. A result obtained at tirzepatide 5 mg says nothing about what tirzepatide 15 mg costs you per month, and on this roster those are frequently different prices.
The direction here agrees with the larger trial evidence, so nothing is overturned. What it adds is a reminder that a head-to-head is a head-to-head at two specific doses, and whether a seller holds its figure as the dose climbs decides what that comparison actually costs to act on.