Cancer incidence and stage at diagnosis in children and adolescents in the Community of Madrid, 2015–2018
Bibliographic record
Abstract
BACKGROUND: Cancer is the leading cause of death in children aged 1-14 and the second in 15-19-year-old adolescents in Spain. The Paediatric Population-Based Cancer Registry of the Community of Madrid was created to monitor its incidence and survival. OBJECTIVES: This study presents the incidence of childhood and adolescent cancer (0-19 years) in Madrid at a population level by sex, age group, type of tumour and stage at diagnosis. METHODS: This study was a retrospective analysis of the total number of cases registered in the Paediatric Population-Based Cancer Registry of the Community of Madrid. The registry employs passive and active case finding: by cross-referencing hospital discharge data, primary healthcare data, mortality data and administrative information; and by validation of all potential incident cases through a review of electronic medical charts. All new diagnoses of malignant neoplasms, non-malignant neoplasms of the Central Nervous System, and uncertain and in situ neoplasms of the bladder, identified in 2015-2018 in individuals under age 20 residing in Madrid, were included. Patient information was collected along with tumour characteristics, including stage at diagnosis according to the Toronto Childhood Cancer Stage Guidelines. Age-specific and age-standardised incidence rates were computed with 95% confidence intervals (CI). RESULTS: A total of 1002 tumours were registered in 5,269,524 person-years, yielding an age-standardised rate of 192.7 (95% CI 184.3, 201.4) cases per million person-years. Male/female rate ratio was 1.1. The most common cancers across all ages comprised CNS tumours, leukaemias and lymphomas (primarily Hodgkin): 45.5 (95% CI 39.9, 51.7), 41.1 (95% CI 35.7, 47.1) and 35.8 (95% CI 30.9, 41.3) cases per million person-years, respectively. The proportion of metastatic tumours at diagnosis was similar for ages 0-14 (18.6%) and 15-19 (18.7%). CONCLUSIONS: This study provides a comprehensive understanding of childhood and adolescent cancer incidence in Madrid. The registry provides high-quality data and consolidates epidemiological surveillance of cancer in the region.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.002 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".