No association between circulating concentrations of vitamin D and risk of lung cancer: An analysis in 20 prospective studies in the Lung Cancer Cohort Consortium (LC3)

Abstract

Background

There is observational evidence suggesting that high vitamin D concentrations may protect against lung cancer. To investigate this hypothesis in detail, we measured circulating vitamin D concentrations in pre-diagnostic blood from 20 cohorts participating in the Lung Cancer Cohort Consortium (LC3).

Patients and methods

The study included 5,313 lung cancer cases and 5,313 controls selected from. Blood samples for the cases were collected, on average, 5 years prior to lung cancer diagnosis. Controls were individually matched to the cases by cohort, sex, age, race/ethnicity, date of blood collection, and smoking status in 5 categories. Liquid chromatography coupled with tandem mass spectrometry was used to separately analyze 25-hydroxyvitamin D₂ (25(OH)D₂) and 25-hydroxyvitamin D₃ (25(OH)D₃) and their concentrations were combined to give an overall measure of 25(OH)D. We used conditional logistic regression to calculate odds ratios (OR) and 95% confidence intervals (CI) for 25(OH)D as both a continuous and categorical variable.

Results

Overall, no apparent association between 25(OH)D and risk of lung cancer was observed (multivariable adjusted OR for a doubling in concentration: 0.98, 95% confidence interval: 0.91, 1.06). Similarly, we found no clear evidence of interaction by cohort, sex, age, smoking status, or histology.

Conclusion

This study did not support an association between vitamin D concentrations and lung cancer risk.

Connolly, Tim, Doing Philosophy Comparatively

H uang Zongxi as a Republican: A Theory of Governance for Confucian Democracy

Abstract

Confucianism has been historically intertwined with authoritarianism in general and monarchy in specific. Various contemporary attempts to reconcile Confucianism with democracy have yielded controversial results mostly due to the theoretical tension between the authoritarian character of the former and the liberal one of the latter. This article seeks to develop an alternative route to Confucian democracy by drawing from Huang Zongxi's 黃宗羲 Waiting for the Dawn: A Plan for the Prince (Mingyi Daifang Lu 明夷待訪錄). In this well-known work, Huang argues for a form of limited government that is built upon laws, political protection of academic freedom, good institutional designs, and separation of governmental powers. While these features seem to qualify Huang only as a defective liberal, this article argues that they are in much coherence with the insights of republicanism concerning good governance. This article will argue that the republican themes embodied in Waiting for the Dawn can justify and support a particular form of Confucian republican democracy.

RE: “Deployment And Preterm Birth Among US Army Soldiers”

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