Google Location History Following Oesophagectomy and/or Gastrectomy

Surgery is the mainstay of treatment for patients with early-disease esophageal and gastric cancer. Open surgery for oesophageal cancer commonly involves large incisions in the chest, which is associated with a high rate of respiratory complications in the postoperative period. Patients with oesophageal or gastric cancer furthermore commonly present with significant weight loss, affecting both muscle mass and muscle strength. This could further decrease the physical fitness and increase the risk for experiencing complications after treatment. Patients also report a decreased physical functioning in quality of life at least 3 years after surgery, suggesting this is a persistent deficit. Currently, no long-term data is available assessing physical activity levels in oesophageal or gastric cancer survivors. Thus, quantifying physical activity levels in these patients may identify the period in which patients' activity levels are most likely to deteriorate. Activity levels will be assessed from Google Location History from the patient's phone, providing summary of physical activity over time. This information could be used in the future to provide adequate physical therapy intervention which might improve recovery in several aspects, such as physical fitness but also respiratory function and quality of life.

Sex

All

Minimum age

18 Years

Maximum age

90 Years

Inclusion Criteria post-oesophagectomy or -gastrectomy group:

* is 18 years or older, and below 90 years of age, AND
* be able to walk, run or cycle a short distance, AND
* has been diagnosed with or already treated for oesophageal or gastric cancer
* if already receiving treatment, any type of treatment is included, either surgical resection for early-stage disease or definitive chemotherapy for advanced disease, AND
* use and Android phone

Inclusion Criteria healthy controls:

* is 18 years or older, and below 90 years of age, AND
* no previous history of upper gastrointestinal cancer, AND
* not diagnosed with or undergoing treatment for active cancer since active cancer or cancer-related treatment might influence physical activity levels and quality of life, AND
* be able to walk, run or cycle a short distance, AND
* use an Android phone

Exclusion Criteria:

* lacks capacity or is unable to provide informed consent, OR
* below 18 years of age or over 90 years of age, OR
* cannot walk, run or cycle a short distance, OR
* is diagnosed with or undergoing treatment for active cancer other than oesophageal or gastric cancer, OR
* is pregnant, OR
* is not using an Android phone, as Google Location History data is only accessible from an Android device

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