Fitbits could predict cancer trial side effects

NCT ID NCT03971266

Terminated Knowledge-focused Sponsor: University of Southern California Source: ClinicalTrials.gov ↗

First seen Jun 26, 2026 · Last updated Jun 26, 2026

Summary

This study tested whether wearable fitness trackers (like Fitbits) and smartphone diaries can give a more accurate picture of cancer patients' physical function than standard doctor assessments. Researchers enrolled 31 cancer patients starting early-phase clinical trials. The goal was to see if tracker data could predict who would experience serious side effects, but the study was terminated early, so results are limited.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

Active substance: Activity monitor (Fitbit) and smartphone diary
What this could lead to: If successful, this approach could help doctors identify which cancer patients are at higher risk for serious side effects during early-phase trials.
What could go wrong: This was a small, terminated study with only 31 participants, so results may not be reliable or apply to all cancer patients. The technology may not accurately capture overall health.

This is an AI summary of the original study and may miss details. Read our disclaimer.

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Conditions

The condition(s) this trial relates to.

cancer neoplasm

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

MALIGNANT NEOPLASM

Contacts and locations

Locations

Los Angeles County-USC Medical Center

Los Angeles, California, 90033, United States
USC / Norris Comprehensive Cancer Center

Los Angeles, California, 90033, United States

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