Changes in dietary habits and trends in colorectal Cancer incidence in six american countries during 1975-2002
Bibliographic record
Abstract
Aims: the aim of this study is to analyze colorectal cancer incidence in six Americancountries in the last decades and its relationship with changes in the dietary habits ofthe population.Methods: incidence rates, adjusted to worldwide population and according to genders,were obtained for each country from the International Agency for Research on Cancer,1975-2002.Annual per capita consumption of different food was obtained from the Food andAgriculture Organization of United Nations, 1965-2007.Pearson’s correlation coefficients were calculated for incidence rates, according togenders and dietary variables using ten-year delay intervals.Results: two different situations are observed in relation to colorectal cancer. On onehand, countries with relatively small incidence rates but increasing lineal trends, inboth genders, such as Brazil, Colombia, Costa Rica and Ecuador and, on the otherhand, countries with relatively high incidence rates but decreasing lineal trends, suchas Canada (only in women) and USA, in both genders.Conclusion: in order to avoid the situation observed in Canada and the USA in othercountries, reverting the trend for colorectal cancer incidence rates in both gendershas become an important issue, by means of the implementation of Health Promotionmeasures before reaching such elevated incidence rates. These measures must beoriented towards the promotion of healthy dietary habits in Brazil, Colombia, Costa Ricaand Ecuador, considering the minimal time span of ten-fifteen years between changesin the exposure to risk and protective factors and the effects upon the incidence of thetumour.RESUMEN:Objetivos: este estudio analiza la incidencia de cáncer colorrectal en seis paísesamericanos en las últimas décadas y su relación con cambios en los hábitos dietéticos.Métodos: las tasas de incidencia ajustadas, según sexos, se obtuvieron por país deInternacional Agency for Research on Cáncer, 1975-2002.Los consumos anuales per capita de distintas variables dietéticas se obtuvieron de Foodand Agriculture Organization of United Nations, 1965-2007.Se calcularon los coeficientes de correlación de Pearson para las tasas de incidenciasegún sexo y las distintas variables de la dieta con retardo de diez años.Resultados: se observan dos situaciones distintas en relación al cáncer colorrectal. Porun lado, países con tasas de incidencia relativamente pequeñas pero con tendenciaslineales de las mismas crecientes en ambos sexos: Brasil, Colombia, Costa Rica yEcuador. Por otro lado, países con tasas de incidencia relativamente elevadas pero contendencias lineales de las mismas decrecientes, en Canadá (sólo en mujeres) y, enambos sexos, en USA.Conclusión: para que la situación de Canadá y USA no se repita en el resto de países,revirtiendo las tendencias de incidencia del cáncer colorrectal, en ambos sexos, sinesperar a alcanzar valores tan elevados, es necesaria la aplicación de medidas dePromoción de la Salud que promuevan hábitos dietéticos saludables en Brasil, Colombia,Costa Rica y Ecuador de forma urgente, considerando el desfase temporal necesario dediez-quince años para que los cambios en la exposición a factores de riesgo y protecciónmodifiquen la incidencia del tumor.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.002 |
| 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), 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".