Fitbits could predict cancer trial side effects
NCT ID NCT03971266
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.
Disclaimer
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This is a summary of
the original study
.
Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
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Locations
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Los Angeles County-USC Medical Center
Los Angeles, California, 90033, United States
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USC / Norris Comprehensive Cancer Center
Los Angeles, California, 90033, United States