# Open Data & OKF Knowledge Packages | Breast Cancer Charity

> Source: https://breastcancer-charity.org/open-data/
> Open Knowledge Format (OKF) data packages for global breast cancer survival stats, screening unit costs (£25 screening, £75 biopsy), and NHS invitation…

📊 Open Knowledge Format (OKF)

We publish open, machine-readable datasets covering breast cancer survival rates, programme unit economics, and screening eligibility criteria under Creative Commons (CC-BY 4.0).

## Quick answer

Yes. Breast Cancer Charity publishes Open Knowledge Format (OKF) Frictionless Data Packages containing structured CSV datasets for global survival statistics, programme unit costs (£25 screening, £75 biopsy), and NHS screening criteria under Creative Commons Attribution (CC-BY 4.0) at breastcancer-charity.org/data/datapackage.json.

OKF Data Package Specification

## datapackage.json (Frictionless Standard)

Machine-readable JSON schema defining all 3 tabular resources, data types, licenses, and provenance markers for LLMs, research crawlers, and AI agents.

[View datapackage.json ↗](https://breastcancer-charity.org/data/datapackage.json) [.well-known Mirror ↗](https://breastcancer-charity.org/.well-known/datapackage.json)

## Why Open Knowledge Format (OKF) Matters for AI Search & Research

The Open Knowledge Format (OKF) and Frictionless Data standards provide machine-readable metadata that allows AI engines (such as Perplexity, ChatGPT, Gemini, and Claude) to parse facts, unit economics, and health statistics with 100% deterministic accuracy.

By coupling our datapackage.json manifest with Schema.org Dataset distribution arrays ( application/vnd.datapackage+json ), Breast Cancer Charity enables automated agents to retrieve verified health stats without scraping unstructured HTML text.

### Programmatic Data Access via cURL or Python

Developers and research agents can fetch the manifest or raw CSVs directly with standard HTTP requests:

# Fetch Open Knowledge Data Package Manifest

curl -H "Accept: application/vnd.datapackage+json" https://breastcancer-charity.org/data/datapackage.json

# Fetch Screening Unit Cost CSV

curl https://breastcancer-charity.org/data/screening-unit-cost-economics.csv

### Annual OKF Data Revision & Version History

Datasets are versioned semantically ( v2026.1.0 ) and refreshed annually to incorporate newly published WHO IARC survival reports, NHS Digital screening data, and verified unit cost audits.

| Version | Release Date | Cadence | Summary of Changes | Next Review |
| --- | --- | --- | --- | --- |
| v2026.1.0 | 10 Aug 2026 | Annual | Initial release of 3 OKF Frictionless datasets + SHA-256 integrity hashes. | Aug 2027 |

Tabular Dataset

### Global Breast Cancer 5-Year Survival Rates

[Download CSV (.csv) ↓](https://breastcancer-charity.org/data/global-breast-cancer-survival-stats.csv)

Relative 5-year survival rates by stage and country income tier compiled from WHO IARC (2024), NHS England, and Cancer Research UK benchmarks.

| Region / Income Tier | Stage | 5-Yr Survival | Primary Source |
| --- | --- | --- | --- |
| High-Income (UK / EU / US) | Stage 1 | 98% | NHS England / CRUK 2026 |
| High-Income (UK / EU / US) | Stage 2 | 90% | NHS England / CRUK 2026 |
| High-Income (UK / EU / US) | Stage 3 | 70% | NHS England / CRUK 2026 |
| High-Income (UK / EU / US) | Stage 4 (Secondary) | 25% | NHS England / CRUK 2026 |
| Low/Middle-Income (Sub-Saharan / S. Asia) | Stage 1/2 (Early) | 55% | WHO IARC 2024 |
| Low/Middle-Income (Sub-Saharan / S. Asia) | Stage 3/4 (Late) | 25% | WHO IARC 2024 |

Tabular Dataset

### Programme Unit Cost Economics

[Download CSV (.csv) ↓](https://breastcancer-charity.org/data/screening-unit-cost-economics.csv)

Unit costs for mobile clinical exams, ultrasound screening, core needle biopsies, hormone therapy support, and surgical access co-payments.

| Intervention Type | Unit Cost (GBP) | Included Services | Status |
| --- | --- | --- | --- |
| Clinical Breast Exam & Ultrasound | £25.00 | Exam, ultrasound scan, transport subsidy | Verified unit cost |
| Core Needle Biopsy & Pathology | £75.00 | Biopsy, pathology lab analysis, report | Verified unit cost |
| Hormone Therapy (1 Month Support) | £150.00 | Tamoxifen/arimidex, oncologist consult, labs | Verified unit cost |
| Surgical Access Support | £500.00 | Hospital co-payment, transport, follow-up | Verified unit cost |

Tabular Dataset

### UK NHS Breast Screening Eligibility Matrix

[Download CSV (.csv) ↓](https://breastcancer-charity.org/data/nhs-screening-eligibility-matrix.csv)

NHS breast screening invitation ages, routine 3-year frequency rules, self-referral thresholds for women 72+, and high-risk referral pathways.

| Age Bracket | Invitation Type | Frequency | Cost |
| --- | --- | --- | --- |
| Under 40 | Symptom Referral / High Risk | As clinically indicated | Free NHS |
| 40 to 49 | Guidance / Trial Expansion | As clinically indicated | Free NHS |
| 50 to 71 | Routine Invitation | Every 3 years | Free NHS |
| 72 and over | Self-Referral Eligible | Every 3 years | Free NHS |

Open Data License (CC-BY 4.0)

All datasets on this page are licensed under Creative Commons Attribution 4.0 International. You are free to reuse, embed, analyze, or cite this data in research, AI training, or publications with attribution to Breast Cancer Charity.

[CC-BY 4.0 Details ↗](https://creativecommons.org/licenses/by/4.0/)

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