Emerging cancer incidence trends in Canada: The growing burden of young adult cancers
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Background Recent studies have identified increases in cancer incidence among younger adults for some cancers. This study examined incidence trends for 28 cancers in Canada by age and birth cohort from 1983 to 2012. Methods Canadian incidence data for 20 to 84 year‐olds were obtained from the Cancer Incidence in Five Continents Plus database. Age‐period‐cohort modeling was used to estimate the average annual percentage changes (AAPCs) and incidence rate ratios (IRRs) for 10‐year birth cohorts (reference cohort, 1943) for 28 cancer types. Results Incidence increased for 13 cancer sites among adults younger than 50 years (1983‐2012), with the largest increase occurring for rectal cancer (AAPC 20‐24 , 5.62; 95% confidence interval [CI], 3.77‐7.51) and colon cancer (AAPC 20‐24 , 4.08; 95% CI, 2.89‐5.29). Compared with the 1943 birth cohort, persons born circa 1988 had approximately 5‐ and 2‐fold greater risks of rectal cancer (IRR, 4.98; 95% CI, 2.87‐8.63) and colon cancer (IRR, 2.31; 95% CI, 1.62‐3.30), respectively. Incidence decreased among younger adults for 9 sites (1983‐2012), with the largest decreases observed for lung cancer (AAPC 25‐29 ,−2.29; 95% CI, −3.57 to −0.98), cervical cancer (AAPC 25‐29 , −1.29; 95% CI, −1.67 to −0.90), and melanoma (AAPC 25‐29 , −0.61; 95% CI, −0.97 to −0.24). Decreased risks in recent birth cohorts were observed for all sites with decreasing trends in younger adults. For example, the risk of lung cancer was 60% lower in the 1988 birth cohort than the 1943 birth cohort (IRR, 0.42; 95% CI, 0.23‐0.78). Conclusions Incidence among young adults is increasing for some cancers associated with obesity but decreasing for many cancers associated with infections or smoking. Although further studies are needed to replicate these findings and understand the etiology of early‐onset cancers, measures to promote healthy behaviors in young adults warranted.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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 it