author_facet Abbas, Sascha
Chang‐Claude, Jenny
Linseisen, Jakob
Abbas, Sascha
Chang‐Claude, Jenny
Linseisen, Jakob
author Abbas, Sascha
Chang‐Claude, Jenny
Linseisen, Jakob
spellingShingle Abbas, Sascha
Chang‐Claude, Jenny
Linseisen, Jakob
International Journal of Cancer
Plasma 25‐hydroxyvitamin D and premenopausal breast cancer risk in a German case‐control study
Cancer Research
Oncology
author_sort abbas, sascha
spelling Abbas, Sascha Chang‐Claude, Jenny Linseisen, Jakob 0020-7136 1097-0215 Wiley Cancer Research Oncology http://dx.doi.org/10.1002/ijc.23904 <jats:title>Abstract</jats:title><jats:p>Laboratory and epidemiological data have linked vitamin D to breast cancer prevention. Beside dietary intake, endogenous production of vitamin D substantially contributes to a subject's vitamin D status. Most studies, however, have assessed dietary intake only. Although differential effects of vitamin D on premenopausal and postmenopausal breast cancer have been discussed, this is the first study to investigate the association of plasma 25‐hydroxyvitamin D [25(OH)D], as indicator of the overall vitamin D status, with breast cancer risk with restriction to premenopausal women only. We used data of a population‐based case‐control study comprising 289 cases and 595 matched controls. Information on sociodemographic and breast cancer risk factors was collected by questionnaire and plasma 25(OH)D was measured by enzyme immunoassay. Odds ratios (ORs) and 95% confidence intervals (CIs) were calculated using conditional logistic regression. We observed a significant inverse association between breast cancer risk and plasma 25(OH)D concentrations. Compared with the lowest category (&lt;30 nmol/L), the ORs (95% CI) for the upper categories (30–45, 45–60, ≥60 nmol/L) were 0.68 (0.43–1.07), 0.59 (0.37–0.94) and 0.45 (0.29–0.70), respectively (<jats:italic>p</jats:italic><jats:sub>trend</jats:sub> = 0.0006). The association was shown to be nonlinear (<jats:italic>p</jats:italic><jats:sub>nonlinearity</jats:sub> = 0.06) in fractional polynomial analysis with a stronger effect in women at low plasma 25(OH)D levels, providing some evidence of a threshold effect (at circa 50 nmol/L). The association was stronger in progesterone receptor negative tumors, with suggestive evidence of effect heterogeneity (<jats:italic>p</jats:italic><jats:sub>heterogeneity</jats:sub> = 0.05, case‐only model). Our findings support a protective effect of vitamin D for premenopausal breast cancer. © 2008 Wiley‐Liss, Inc.</jats:p> Plasma 25‐hydroxyvitamin D and premenopausal breast cancer risk in a German case‐control study International Journal of Cancer
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series International Journal of Cancer
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title Plasma 25‐hydroxyvitamin D and premenopausal breast cancer risk in a German case‐control study
title_unstemmed Plasma 25‐hydroxyvitamin D and premenopausal breast cancer risk in a German case‐control study
title_full Plasma 25‐hydroxyvitamin D and premenopausal breast cancer risk in a German case‐control study
title_fullStr Plasma 25‐hydroxyvitamin D and premenopausal breast cancer risk in a German case‐control study
title_full_unstemmed Plasma 25‐hydroxyvitamin D and premenopausal breast cancer risk in a German case‐control study
title_short Plasma 25‐hydroxyvitamin D and premenopausal breast cancer risk in a German case‐control study
title_sort plasma 25‐hydroxyvitamin d and premenopausal breast cancer risk in a german case‐control study
topic Cancer Research
Oncology
url http://dx.doi.org/10.1002/ijc.23904
publishDate 2009
physical 250-255
description <jats:title>Abstract</jats:title><jats:p>Laboratory and epidemiological data have linked vitamin D to breast cancer prevention. Beside dietary intake, endogenous production of vitamin D substantially contributes to a subject's vitamin D status. Most studies, however, have assessed dietary intake only. Although differential effects of vitamin D on premenopausal and postmenopausal breast cancer have been discussed, this is the first study to investigate the association of plasma 25‐hydroxyvitamin D [25(OH)D], as indicator of the overall vitamin D status, with breast cancer risk with restriction to premenopausal women only. We used data of a population‐based case‐control study comprising 289 cases and 595 matched controls. Information on sociodemographic and breast cancer risk factors was collected by questionnaire and plasma 25(OH)D was measured by enzyme immunoassay. Odds ratios (ORs) and 95% confidence intervals (CIs) were calculated using conditional logistic regression. We observed a significant inverse association between breast cancer risk and plasma 25(OH)D concentrations. Compared with the lowest category (&lt;30 nmol/L), the ORs (95% CI) for the upper categories (30–45, 45–60, ≥60 nmol/L) were 0.68 (0.43–1.07), 0.59 (0.37–0.94) and 0.45 (0.29–0.70), respectively (<jats:italic>p</jats:italic><jats:sub>trend</jats:sub> = 0.0006). The association was shown to be nonlinear (<jats:italic>p</jats:italic><jats:sub>nonlinearity</jats:sub> = 0.06) in fractional polynomial analysis with a stronger effect in women at low plasma 25(OH)D levels, providing some evidence of a threshold effect (at circa 50 nmol/L). The association was stronger in progesterone receptor negative tumors, with suggestive evidence of effect heterogeneity (<jats:italic>p</jats:italic><jats:sub>heterogeneity</jats:sub> = 0.05, case‐only model). Our findings support a protective effect of vitamin D for premenopausal breast cancer. © 2008 Wiley‐Liss, Inc.</jats:p>
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author Abbas, Sascha, Chang‐Claude, Jenny, Linseisen, Jakob
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container_issue 1
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container_title International Journal of Cancer
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description <jats:title>Abstract</jats:title><jats:p>Laboratory and epidemiological data have linked vitamin D to breast cancer prevention. Beside dietary intake, endogenous production of vitamin D substantially contributes to a subject's vitamin D status. Most studies, however, have assessed dietary intake only. Although differential effects of vitamin D on premenopausal and postmenopausal breast cancer have been discussed, this is the first study to investigate the association of plasma 25‐hydroxyvitamin D [25(OH)D], as indicator of the overall vitamin D status, with breast cancer risk with restriction to premenopausal women only. We used data of a population‐based case‐control study comprising 289 cases and 595 matched controls. Information on sociodemographic and breast cancer risk factors was collected by questionnaire and plasma 25(OH)D was measured by enzyme immunoassay. Odds ratios (ORs) and 95% confidence intervals (CIs) were calculated using conditional logistic regression. We observed a significant inverse association between breast cancer risk and plasma 25(OH)D concentrations. Compared with the lowest category (&lt;30 nmol/L), the ORs (95% CI) for the upper categories (30–45, 45–60, ≥60 nmol/L) were 0.68 (0.43–1.07), 0.59 (0.37–0.94) and 0.45 (0.29–0.70), respectively (<jats:italic>p</jats:italic><jats:sub>trend</jats:sub> = 0.0006). The association was shown to be nonlinear (<jats:italic>p</jats:italic><jats:sub>nonlinearity</jats:sub> = 0.06) in fractional polynomial analysis with a stronger effect in women at low plasma 25(OH)D levels, providing some evidence of a threshold effect (at circa 50 nmol/L). The association was stronger in progesterone receptor negative tumors, with suggestive evidence of effect heterogeneity (<jats:italic>p</jats:italic><jats:sub>heterogeneity</jats:sub> = 0.05, case‐only model). Our findings support a protective effect of vitamin D for premenopausal breast cancer. © 2008 Wiley‐Liss, Inc.</jats:p>
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spelling Abbas, Sascha Chang‐Claude, Jenny Linseisen, Jakob 0020-7136 1097-0215 Wiley Cancer Research Oncology http://dx.doi.org/10.1002/ijc.23904 <jats:title>Abstract</jats:title><jats:p>Laboratory and epidemiological data have linked vitamin D to breast cancer prevention. Beside dietary intake, endogenous production of vitamin D substantially contributes to a subject's vitamin D status. Most studies, however, have assessed dietary intake only. Although differential effects of vitamin D on premenopausal and postmenopausal breast cancer have been discussed, this is the first study to investigate the association of plasma 25‐hydroxyvitamin D [25(OH)D], as indicator of the overall vitamin D status, with breast cancer risk with restriction to premenopausal women only. We used data of a population‐based case‐control study comprising 289 cases and 595 matched controls. Information on sociodemographic and breast cancer risk factors was collected by questionnaire and plasma 25(OH)D was measured by enzyme immunoassay. Odds ratios (ORs) and 95% confidence intervals (CIs) were calculated using conditional logistic regression. We observed a significant inverse association between breast cancer risk and plasma 25(OH)D concentrations. Compared with the lowest category (&lt;30 nmol/L), the ORs (95% CI) for the upper categories (30–45, 45–60, ≥60 nmol/L) were 0.68 (0.43–1.07), 0.59 (0.37–0.94) and 0.45 (0.29–0.70), respectively (<jats:italic>p</jats:italic><jats:sub>trend</jats:sub> = 0.0006). The association was shown to be nonlinear (<jats:italic>p</jats:italic><jats:sub>nonlinearity</jats:sub> = 0.06) in fractional polynomial analysis with a stronger effect in women at low plasma 25(OH)D levels, providing some evidence of a threshold effect (at circa 50 nmol/L). The association was stronger in progesterone receptor negative tumors, with suggestive evidence of effect heterogeneity (<jats:italic>p</jats:italic><jats:sub>heterogeneity</jats:sub> = 0.05, case‐only model). Our findings support a protective effect of vitamin D for premenopausal breast cancer. © 2008 Wiley‐Liss, Inc.</jats:p> Plasma 25‐hydroxyvitamin D and premenopausal breast cancer risk in a German case‐control study International Journal of Cancer
spellingShingle Abbas, Sascha, Chang‐Claude, Jenny, Linseisen, Jakob, International Journal of Cancer, Plasma 25‐hydroxyvitamin D and premenopausal breast cancer risk in a German case‐control study, Cancer Research, Oncology
title Plasma 25‐hydroxyvitamin D and premenopausal breast cancer risk in a German case‐control study
title_full Plasma 25‐hydroxyvitamin D and premenopausal breast cancer risk in a German case‐control study
title_fullStr Plasma 25‐hydroxyvitamin D and premenopausal breast cancer risk in a German case‐control study
title_full_unstemmed Plasma 25‐hydroxyvitamin D and premenopausal breast cancer risk in a German case‐control study
title_short Plasma 25‐hydroxyvitamin D and premenopausal breast cancer risk in a German case‐control study
title_sort plasma 25‐hydroxyvitamin d and premenopausal breast cancer risk in a german case‐control study
title_unstemmed Plasma 25‐hydroxyvitamin D and premenopausal breast cancer risk in a German case‐control study
topic Cancer Research, Oncology
url http://dx.doi.org/10.1002/ijc.23904