Data dictionary: Breast Cancer - NBCA

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This is a summary of the variables available in the database. You can download the complete data dictionary. Click here to learn more.

Patient Information

• Health Facility
• Unique Patient Number
• Date of Birth
• Gender
• Date of Death (if applicable)
• Cause of Death

Treatment Details

• Episode Start Date (Incidence Date)
• Has the patient participated in a registered trial?
• Has the patient received neo-adjuvant therapy (min. 4 weeks before surgery)?
• Start Date of Neo-adjuvant Therapy
• End Date of Neo-adjuvant Therapy
• Number of Neo-adjuvant Cycles Actually Given
• Neo-adjuvant Chemotherapy
• Adjuvant Chemotherapy Actually Received by the Patient
• Start Date of Adjuvant Chemotherapy
• End Date of Adjuvant Chemotherapy
• Number of Adjuvant Cycles Actually Given
• Adjuvant Immunotherapy Received by the Patient
• Complicated Course After Chemotherapy

Diagnosis and Pathology

• Lateralization of this Tumor
• Is there a history? It concerns the history of (one of) the breast(s).
• Was the tumor discovered during population screening (screening)?
• Is the tumor palpable?
• Final BIRADS classification after imaging (before biopsy)
• Incidence Date (date of first tumor-positive biopsy based on cytology or histology)
• Invasiveness
• Histological Type
• Estrogen Receptor %
• Progesterone Receptor %
• HER-2 Determination

Surgical and Oncological Treatment

• Date of First Tumor Excision
• Type of Breast Operation at First Tumor Excision
• Was the Plastic Surgeon Involved in the Surgery?
• Sentinel Lymph Node Biopsy Done?
• Date of Sentinel Lymph Node Biopsy
• Result of Sentinel Lymph Node Biopsy
• Was there an Axillary Lymph Node Dissection?
• Date of Axillary Lymph Node Dissection

Radiation and Postoperative Details

• Radiotherapy
• Type of Radiotherapy Received by the Patient
• Radiotherapy Institute Where the Radiotherapy Was Given
• Start Date of Radiotherapy
• End Date of Radiotherapy
• Was the Patient Discussed in a Multidisciplinary Team Post-Operation?

COVID-19 Specific

• Was there a (clinical) suspicion or a test for SARS-CoV-2 infection in the period before admission to 30 days after admission?
• Date of First Suspicion of SARS-CoV-2 Infection
• Date of First Specific Test for SARS-CoV-2 Infection
• Date of First Positive Lab Test for SARS-CoV-2
• ICU Admission Date and Time
• ICU Discharge Date and Time
• Discharge Destination after ICU Stay
• Final Status Regarding SARS-CoV-2