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. 2018 Jun 18;9(1):2367.
doi: 10.1038/s41467-018-04814-4.

Association between post-diagnostic use of cholera vaccine and risk of death in prostate cancer patients

Jianguang Ji  1 , Jan Sundquist  2   3 , Kristina Sundquist  2   3
Affiliations

Association between post-diagnostic use of cholera vaccine and risk of death in prostate cancer patients

Jianguang Ji et al. Nat Commun. .

Abstract

Recent evidence suggests that cholera toxin might have multiple functions regarding the ability to regulate the immune system. However, it is unknown whether subsequent administration of cholera vaccine might affect the mortality rate in patients with prostate cancer. Here we report that patients in Sweden, who were diagnosed with prostate cancer between July 2005 and December 2014 and used cholera vaccine, have a decreased risk of death from prostate cancer (HR, 0.57; 95% CI, 0.40-0.82) as compared to patients with prostate cancer but without cholera vaccine use, adjusted for a range of confounding factors. In addition, patients using cholera vaccine show a decreased risk of death overall (HR, 0.53; 95% CI, 0.41-0.69). The decreased mortality rate is largely consistent, irrespective of patients' age or tumor stage at diagnosis. In this population-based study, we suggest that subsequent administration of cholera vaccine after prostate cancer diagnosis might reduce the mortality rate.

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Conflict of interest statement

The authors declare no competing interests.

Figures

Fig. 1
Fig. 1
A nonparametric estimate of the hazard ratio as a function of follow-up time
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