Outcome measure
Gravimetric Sweat Production (GSP)
Gravimetric Sweat Production (GSP) is the objective sweat-rate measure used across hyperhidrosis trials. The method weighs absorbent material before and after a defined collection interval to quantify sweat output in milligrams over time.
- Type
- objective measure
- Consumer-facing?
- No
- Primary use
- objective sweat-rate measurement (mg over a defined interval)
Methodology
GSP collects sweat onto pre-weighed filter paper (or similar absorbent material) over a standardized interval — typically 5 minutes — under controlled conditions. The post-collection weight minus the pre-collection weight gives the sweat mass; converting to a rate (mg/5min) allows comparison across treatments, patients, and time points.
Why GSP complements patient-reported measures
GSP is objective: it measures actual sweat output rather than perceived severity. HDSS, HDSM-Ax-7, and ASDD capture lived experience; GSP grounds that experience in a measurable biological output. Trials often pair the two to demonstrate both objective reduction and patient-perceived benefit.
Reading paths
·Related references
Read related evidence.
Treatments scored with this measure