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Serum osteoprotegerin and future risk of cancer and cancer-related mortality in the general population: the Tromsø study

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Abstract

The purpose was to investigate the association between serum osteoprotegerin (OPG) and risk of incident cancer and cancer mortality in a general population. OPG was measured in serum collected from 6,279 subjects without prior cancer recruited from a general population. Incident cancer and cancer-related mortality were registered from inclusion in 1994–95 until end of follow-up December 31, 2008. Cox regression models were used to estimate crude and adjusted (for age, sex and other confounders) hazard ratios and 95 % confidence intervals (HR 95 % CI). There were 948 incident cancers and 387 deaths in the cohort during 71,902 person-years of follow up (median 13.5 years). Subjects with serum OPG in the upper tertile had 79 % higher risk of incident gastrointestinal cancer than those in the lowest tertile (HR 1.79, 95 % CI 1.19–2.67). In women <60 years, serum OPG (per SD 0.81 ng/ml) was associated with reduced risk of incident cancer (all cancers merged; 0.73; 0.57–0.94) and breast cancer (0.51; 0.31–0.83) after adjustment. Subjects in the upper tertile of OPG had higher risk of cancer-related mortality (1.63; 1.16–2.28), particularly mortality from cancer in the gastrointestinal system (2.28; 1.21–4.28) compared to those in the lowest OPG tertile. No significant association was detected between OPG and risk of death from cancer in the respiratory system or death from prostatic cancer. Our findings from a large population based cohort study suggest that serum OPG was associated with increased risk of incident gastrointestinal cancer, inversely associated with breast cancer, and predicts cancer-related mortality.

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The authors disclose no potential conflicts of interest.

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Correspondence to Anders Vik.

Additional information

The study is supported by independent grants from the University of Tromsø and the Northern Norway Regional Health Authority.

Appendix

Appendix

See Tables 6, 7 and 8.

Table 6 Age- and sex-stratified hazard ratios (HR) with 95 % confidence intervals (CI) for incident cancer across OPG tertile groups and per SD increase in OPG levels
Table 7 Age stratified hazard ratios (HR) with 95 % confidence intervals (CI) for incident breast cancer and gastrointestinal cancer across tertiles of osteoprotegerin (OPG) and per 1 standard deviation (SD)* increase in OPG levels
Table 8 Hazard ratios with 95 % confidence intervals (HR 95 % CI) of death of cancer calculated for OPG tertile groups and per SD (women; 1.06 ng/ml, men; 1.17 ng/ml) increase in OPG levels in women (n = 3,174) and men (n = 3,105)

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Vik, A., Brodin, E.E., Mathiesen, E.B. et al. Serum osteoprotegerin and future risk of cancer and cancer-related mortality in the general population: the Tromsø study. Eur J Epidemiol 30, 219–230 (2015). https://doi.org/10.1007/s10654-014-9975-3

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  • DOI: https://doi.org/10.1007/s10654-014-9975-3

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