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1.
J Am Med Inform Assoc ; 29(7): 1217-1224, 2022 06 14.
Artículo en Inglés | MEDLINE | ID: mdl-35348718

RESUMEN

OBJECTIVE: Tumor registries in integrated healthcare systems (IHCS) have high precision for identifying incident cancer but often miss recently diagnosed cancers or those diagnosed outside of the IHCS. We developed an algorithm using the electronic medical record (EMR) to identify people with a history of cancer not captured in the tumor registry to identify adults, aged 40-65 years, with no history of cancer. MATERIALS AND METHODS: The algorithm was developed at Kaiser Permanente Colorado, and then applied to 7 other IHCS. We included tumor registry data, diagnosis and procedure codes, chemotherapy files, oncology encounters, and revenue data to develop the algorithm. Each IHCS adapted the algorithm to their EMR data and calculated sensitivity and specificity to evaluate the algorithm's performance after iterative chart review. RESULTS: We included data from over 1.26 million eligible people across 8 IHCS; 55 601 (4.4%) were in a tumor registry, and 44848 (3.5%) had a reported cancer not captured in a registry. The common attributes of the final algorithm at each site were diagnosis and procedure codes. The sensitivity of the algorithm at each IHCS was 90.65%-100%, and the specificity was 87.91%-100%. DISCUSSION: Relying only on tumor registry data would miss nearly half of the identified cancers. Our algorithm was robust and required only minor modifications to adapt to other EMR systems. CONCLUSION: This algorithm can identify cancer cases regardless of when the diagnosis occurred and may be useful for a variety of research applications or quality improvement projects around cancer care.


Asunto(s)
Prestación Integrada de Atención de Salud , Neoplasias , Adulto , Algoritmos , Recolección de Datos , Registros Electrónicos de Salud , Humanos , Neoplasias/diagnóstico
2.
Am J Clin Nutr ; 114(2): 450-461, 2021 08 02.
Artículo en Inglés | MEDLINE | ID: mdl-33964859

RESUMEN

BACKGROUND: Epidemiologic studies examining the relations between dairy product and calcium intakes and breast cancer have been inconclusive, especially for tumor subtypes. OBJECTIVE: To evaluate the associations between intakes of specific dairy products and calcium and risk of breast cancer overall and for subtypes defined by estrogen receptor (ER) status. METHOD: We pooled the individual-level data of over 1 million women who were followed for a maximum of 8-20 years across studies. Associations were evaluated for dairy product and calcium intakes and risk of incident invasive breast cancer overall (n = 37,861 cases) and by subtypes defined by ER status. Study-specific multivariable hazard ratios (HRs) were estimated and then combined using random-effects models. RESULTS: Overall, no clear association was observed between the consumption of specific dairy foods, dietary (from foods only) calcium, and total (from foods and supplements) calcium, and risk of overall breast cancer. Although each dairy product showed a null or very weak inverse association with risk of overall breast cancer (P, test for trend >0.05 for all), differences by ER status were suggested for yogurt and cottage/ricotta cheese with associations observed for ER-negative tumors only (pooled HR = 0.90, 95% CI: 0.83, 0.98 comparing ≥60 g/d with <1 g/d of yogurt and 0.85, 95% CI: 0.76, 0.95 comparing ≥25 g/d with <1 g/d of cottage/ricotta cheese). Dietary calcium intake was only weakly associated with breast cancer risk (pooled HR = 0.98, 95% CI: 0.97, 0.99 per 350 mg/d). CONCLUSION: Our study shows that adult dairy or calcium consumption is unlikely to associate with a higher risk of breast cancer and that higher yogurt and cottage/ricotta cheese intakes were inversely associated with the risk of ER-negative breast cancer, a less hormonally dependent subtype with poor prognosis. Future studies on fermented dairy products, earlier life exposures, ER-negative breast cancer, and different racial/ethnic populations may further elucidate the relation.


Asunto(s)
Neoplasias de la Mama/prevención & control , Calcio/administración & dosificación , Productos Lácteos , Receptores de Estrógenos/metabolismo , Estudios de Cohortes , Femenino , Humanos , Análisis Multivariante , Receptores de Estrógenos/genética , Factores de Riesgo
3.
Cancer Epidemiol Biomarkers Prev ; 29(11): 2383-2386, 2020 11.
Artículo en Inglés | MEDLINE | ID: mdl-32817071

RESUMEN

BACKGROUND: There is limited evidence of a potential inverse association between coffee, particularly caffeinated coffee, consumption and postmenopausal breast cancer risk, and few studies have examined this association by tumor hormone receptor status. To provide further evidence, we examined total, caffeinated, and decaffeinated coffee consumption in relation to postmenopausal invasive breast cancer incidence overall, and by tumor estrogen receptor (ER) and/or progesterone receptor (PR) subtype. METHODS: Among 57,075 postmenopausal women in the Cancer Prevention Study-II Nutrition Cohort who were cancer free and reported coffee intake in 1999, we identified 2,980 women diagnosed with invasive breast cancer during follow-up through June 2015. Multivariable-adjusted Cox proportional hazards regression was used to compute hazard ratios (HR) and 95% confidence intervals (CI). RESULTS: Neither total, caffeinated, nor decaffeinated coffee consumption was associated with invasive breast cancer risk; HRs (95% CIs) comparing consumption of ≥2 cups per day with <1 cup per month were 0.99 (0.89-1.11), 0.96 (0.87-1.06), and 1.06 (0.95-1.19), respectively. Similarly, coffee consumption was not associated with risk of hormone receptor-positive (ER+ or PR+) or hormone receptor-negative (ER- and PR-) breast tumors. CONCLUSIONS: These findings do not support an association between coffee consumption and invasive breast cancer risk among postmenopausal women. IMPACT: This large prospective study contributes to the limited evidence on coffee consumption and breast cancer risk, finding no association overall or by tumor receptor subtype.


Asunto(s)
Neoplasias de la Mama/etiología , Café/efectos adversos , Neoplasias de la Mama/fisiopatología , Femenino , Humanos , Incidencia , Persona de Mediana Edad , Estado Nutricional , Posmenopausia , Factores de Riesgo
4.
Nutr Cancer ; 65(3): 345-54, 2013.
Artículo en Inglés | MEDLINE | ID: mdl-23530633

RESUMEN

The relative importance of biochemical pathways has not been previously examined when considering the influence of diet on breast cancer risk. To address this issue, we used interview data from a population-based sample of 1463 breast cancer cases and 1500 controls. Dietary intake was assessed shortly after diagnosis using a 101-item food frequency questionnaire. Age- and energy-adjusted odds ratios (ORs) for individual micro- and macronutrients were estimated with logistic regression. Hierarchical modeling was used to account for biologically plausible nutrient pathways (1-carbon metabolism, oxidative stress, glycemic control, and phytoestrogens). Effect estimates from hierarchical modeling were more precise and plausible compared to those from multivariable models. The strongest relationship observed was for the glycemic control pathway, but confidence intervals (CI) were wide [OR (95% CI): 0.86 (0.62, 1.21)]. Little or no effect was observed for the 1-carbon metabolism, oxidative stress, and phytoestrogen pathways. Associations were similar when stratified by supplement use. Our approach that emphasizes biochemical pathways, rather than individual nutrients, revealed that breast cancer risk may be more strongly associated with glycemic control factors than those from other pathways considered. Our study emphasizes the importance of accounting for multiple nutrient pathways when examining associations between dietary intake and breast cancer.


Asunto(s)
Neoplasias de la Mama , Dieta , Anciano , Glucemia/fisiología , Carbohidratos de la Dieta/efectos adversos , Suplementos Dietéticos , Femenino , Ácido Fólico/administración & dosificación , Humanos , Modelos Logísticos , Micronutrientes , Persona de Mediana Edad , New York , Oportunidad Relativa , Estrés Oxidativo , Fitoestrógenos , Factores de Riesgo , Encuestas y Cuestionarios
5.
Am J Epidemiol ; 177(1): 50-8, 2013 Jan 01.
Artículo en Inglés | MEDLINE | ID: mdl-23230042

RESUMEN

Epidemiologic studies suggest that coffee intake is associated with reduced risk of oral/pharyngeal cancer. The authors examined associations of caffeinated coffee, decaffeinated coffee, and tea intake with fatal oral/pharyngeal cancer in the Cancer Prevention Study II, a prospective US cohort study begun in 1982 by the American Cancer Society. Among 968,432 men and women who were cancer free at enrollment, 868 deaths due to oral/pharyngeal cancer occurred during 26 years of follow-up. Cox proportional hazards regression was used to estimate multivariable-adjusted relative risk. Intake of >4 cups/day of caffeinated coffee was associated with a 49% lower risk of oral/pharyngeal cancer death relative to no/occasional coffee intake (relative risk = 0.51, 95% confidence interval: 0.40, 0.64) (1 cup/day = 237 ml). A dose-related decline in relative risk was observed with each single cup/day consumed (P(trend) < 0.001). The association was not modified by sex, smoking status, or alcohol use. An inverse association for >2 cups/day of decaffeinated coffee intake was suggested (relative risk = 0.61, 95% confidence interval: 0.37, 1.01). No association was found for tea drinking. In this large prospective study, caffeinated coffee intake was inversely associated with oral/pharyngeal cancer mortality. Research is needed to elucidate biologic mechanisms whereby coffee might help to protect against these often fatal cancers.


Asunto(s)
Cafeína/administración & dosificación , Café , Neoplasias de la Boca/epidemiología , Neoplasias Faríngeas/epidemiología , , Adulto , Consumo de Bebidas Alcohólicas/epidemiología , Índice de Masa Corporal , Dieta , Relación Dosis-Respuesta a Droga , Femenino , Conductas Relacionadas con la Salud , Humanos , Masculino , Persona de Mediana Edad , Modelos de Riesgos Proporcionales , Estudios Prospectivos , Fumar/epidemiología , Estados Unidos/epidemiología
6.
Int J Cancer ; 131(4): E530-6, 2012 Aug 15.
Artículo en Inglés | MEDLINE | ID: mdl-22021096

RESUMEN

Coffee drinking may be associated with reduced risk of endometrial cancer; however, prospective data are limited. Further, it is not clear whether any association between coffee and endometrial cancer differs according to coffee caffeine content. The association of coffee drinking with incidence of endometrial cancer was evaluated among 226,732 women, aged 50-71, enrolled in the NIH-AARP Diet and Health Study who completed a baseline epidemiologic questionnaire. Following a mean 9.3 years of follow-up, data were available for 1,486 incident endometrial cancer cases. Cox proportional hazards models were used to estimate associations of coffee with endometrial cancer incidence. Sub-group analyses were performed according to smoking status, hormone therapy use (HT) and body habitus. Coffee drinking was inversely related to incidence of endometrial cancer (hazard ratio [HR] comparing drinking of >3 cups/day versus no cups = 0.64, 95% CI, 0.51-0.80; P(trend) = 0.0004). The association of coffee with endometrial cancer risk was apparent for consumption of both regular (HR per cup = 0.90, 95% CI, 0.86-0.95) and decaffeinated coffee (HR per cup = 0.93, 95% CI, 0.87-0.99). The relation of coffee with endometrial cancer incidence varied significantly by HT use (P(interaction) = 0.03) with an association only apparent among HT-never users (HR comparing drinking >3 cups/day versus no cups = 0.54, 95% CI, 0.41-0.72; P(trend) = 0.0005). Endometrial cancer incidence appears to be reduced among women that habitually drink coffee, an association that does not differ according to caffeine content.


Asunto(s)
Café , Conducta de Ingestión de Líquido , Neoplasias Endometriales/etiología , Anciano , Neoplasias Endometriales/epidemiología , Femenino , Humanos , Persona de Mediana Edad , Modelos de Riesgos Proporcionales , Estudios Prospectivos , Factores de Riesgo , Estados Unidos/epidemiología
7.
Cancer ; 115(14): 3271-82, 2009 Jul 15.
Artículo en Inglés | MEDLINE | ID: mdl-19507173

RESUMEN

BACKGROUND: Although many patients take antioxidant dietary supplements during breast cancer treatment, the benefits of such supplementation are unproven. The authors of this report analyzed the prevalence of and factors associated with antioxidant supplement use during breast cancer (BC) treatment among women who participated in the Long Island Breast Cancer Study Project. METHODS: From 2002 through 2004, women with BC who had participated a case-control study from 1996 to 1997 were invited to participate in a follow-up interview. Antioxidant supplement use was defined as any self-reported intake of supplemental vitamin C, vitamin E, beta-carotene, or selenium in individual supplements or multivitamins. RESULTS: Follow-up interview participants were younger, more predominantly white, and of higher socioeconomic status than women who did not respond. Among 764 participants who completed the follow-up interview, 663 (86.8%) reported receiving adjuvant treatment for their BC. Of those 663 women, 401 (60.5%) reported using antioxidants during adjuvant treatment: One hundred twenty of 310 women (38.7%) used antioxidants during chemotherapy, 196 of 464 women (42.2%) used them during radiation, and 286 of 462 women (61.9%) used them during tamoxifen therapy. Of 401 antioxidant users, 278 women (69.3%) used high doses (doses higher than those contained in a Centrum multivitamin). The factors that were associated with high antioxidant supplement use during treatment were higher fruit and vegetable intake at diagnosis (relative risk [RR], 1.71; 95% confidence interval [CI], 1.13-2.59), tamoxifen use (RR, 3.66; 95% CI, 2.32-5.78), ever using herbal products (RR, 3.49; 95% CI, 2.26-5.38), and ever engaging in mind-body practices (RR, 1.72; 95% CI, 1.13-2.64). CONCLUSIONS: Given the common use of antioxidant supplements during BC treatment, often at high doses and in conjunction with other complementary therapies, future research should address the effects of antioxidant supplementation on BC outcomes.


Asunto(s)
Antioxidantes/administración & dosificación , Neoplasias de la Mama/tratamiento farmacológico , Suplementos Dietéticos , Anciano , Estudios de Casos y Controles , Estudios de Cohortes , Estudios de Seguimiento , Humanos , Masculino , Persona de Mediana Edad , Encuestas y Cuestionarios
8.
Am J Clin Nutr ; 85(4): 1098-102, 2007 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-17413111

RESUMEN

BACKGROUND: Dihydrofolate reductase (DHFR) converts dihydrofolate (DHF) into tetrahydrofolate (THF) and plays an essential role in cell metabolism and cellular growth. Folic acid from multivitamins needs to be reduced by DHFR before it participates in cellular reactions. OBJECTIVES: We examined the relation of a 19-base pair (bp) deletion polymorphism of the DHFR gene with the risk of breast cancer by using data from the Long Island Breast Cancer Study Project, a population-based case-control study. We also investigated the transcriptional effect of this deletion polymorphism. DESIGN: Dietary data and habitual use of multivitamins were assessed from a modified Block food-frequency questionnaire (FFQ). Genotypes of DHFR were ascertained from 1062 case subjects and 1099 control subjects by allele-specific polymerase chain reaction. Unconditional logistic regression was used to estimate odds ratios (ORs) and 95% CIs. RESULT: Although the DHFR 19-bp deletion polymorphism was not associated with overall breast cancer risk, we observed a borderline significant additive interaction (P = 0.06) between the DHFR genotype and multivitamin use. The -19-bp allele was associated with greater breast cancer risk in multivitamin users (51.2% of the study population) with an OR of 1.26 (95% CI: 0.96, 1.66) and 1.52 (95% CI: 1.08, 2.13) for the +/- and -/- genotypes, respectively (P for trend = 0.02) than in multivatimin nonusers. A dose-dependent relation (P for trend < 0.001) between DHFR expression and the deletion genotype was observed. Compared with the subjects with the 19-bp +/+ genotype, subjects with the -/- genotype had 4.8-fold DHFR mRNA levels. CONCLUSIONS: The DHFR 19-bp deletion polymorphism affects the transcription of DHFR gene in humans. Multivitamin supplements may place a subgroup of women (ie, those with the -19-bp allele) at elevated risk of developing breast cancer.


Asunto(s)
Neoplasias de la Mama/enzimología , Dieta , Polimorfismo Genético , Tetrahidrofolato Deshidrogenasa/genética , Vitaminas/administración & dosificación , Anciano , Secuencia de Bases , Neoplasias de la Mama/epidemiología , Neoplasias de la Mama/genética , Estudios de Casos y Controles , Suplementos Dietéticos , Femenino , Ácido Fólico/administración & dosificación , Ácido Fólico/análogos & derivados , Ácido Fólico/metabolismo , Genotipo , Humanos , Modelos Logísticos , Persona de Mediana Edad , Oportunidad Relativa , Factores de Riesgo , Eliminación de Secuencia , Encuestas y Cuestionarios , Tetrahidrofolatos/metabolismo , Complejo Vitamínico B/administración & dosificación , Complejo Vitamínico B/metabolismo , Vitaminas/metabolismo
9.
Breast Cancer Res Treat ; 98(2): 199-208, 2006 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-16538530

RESUMEN

OBJECTIVE: To determine whether fruit, vegetable, and micronutrient intake 1 year prior to breast cancer diagnosis is associated with a reduction in the subsequent risk of all-cause or breast cancer-specific mortality. METHODS: Follow-up data from 1,235 invasive breast cancer cases age 25-98 years from the Long Island Breast Cancer Study Project were analyzed. At the 1996-1997 case-control interview, respondents completed a food frequency questionnaire, which assessed dietary intake of fruits, vegetables, and vitamin supplement use in the previous 12 months. All-cause mortality (n=186 deaths) and breast cancer-specific mortality status (n=125 deaths, 67.2%) were determined through December 31, 2002. RESULTS: Hazard ratios (HRs) for all-cause mortality were insignificantly reduced for intake of any fruits, fruit juices, and vegetables (HR=0.68, 95% CI: 0.42-1.09) and leafy vegetables (HR=0.72, 95% CI: 0.41-1.24) among post-menopausal women only. Both of these associations were more pronounced among those with ER+PR+ tumors (HR=0.54, 95% CI: 0.27-1.10, and HR=0.66, 95% CI: 0.33-1.31, respectively). Similar associations were observed for breast cancer-specific mortality. CONCLUSIONS: In a cohort of women diagnosed with breast cancer, higher intake of fruits, vegetables, and micronutrients was associated with a non-significant survival advantage in post-menopausal women only.


Asunto(s)
Neoplasias de la Mama/mortalidad , Frutas , Micronutrientes/administración & dosificación , Verduras , Adulto , Anciano , Anciano de 80 o más Años , Estudios de Casos y Controles , Femenino , Humanos , Persona de Mediana Edad , Receptores de Estrógenos/análisis , Receptores de Progesterona/análisis
10.
Am J Epidemiol ; 162(10): 943-52, 2005 Nov 15.
Artículo en Inglés | MEDLINE | ID: mdl-16192345

RESUMEN

Observed weak or null associations between fruit and vegetable intake and breast cancer risk could be due to heterogeneity in endogenous antioxidant capabilities. The authors evaluated potential relations between a functional polymorphism in catalase, an antioxidant enzyme, and breast cancer risk, particularly in relation to fruit and vegetable intake and supplement use. Women (1,008 cases and 1,056 controls) in the Long Island Breast Cancer Study Project (1996-1997) were interviewed, completed a food frequency questionnaire, and provided blood for genotyping. The high-activity catalase CC genotype was associated with an overall 17% reduction in risk of breast cancer compared with having at least one variant T allele (odds ratio = 0.83, 95% confidence interval: 0.69, 1.00). Vegetable and, particularly, fruit consumption contributed to the decreased risk associated with the catalase CC genotype. Associations were more pronounced among women who did not use vitamin supplements, with a significant multiplicative interaction (p(interaction) = 0.02) for the CC genotype and high fruit intake (odds ratio = 0.59, 95% confidence interval: 0.38, 0.89), and there was no association among supplement users. These results indicate the importance of diet, rather than supplement use, in concert with endogenous antioxidant capabilities, in the reduction of breast cancer risk. CC genotypes were prevalent in approximately 64% of controls; thus, the preventive potential for fruit consumption has widespread implications.


Asunto(s)
Neoplasias de la Mama/enzimología , Neoplasias de la Mama/epidemiología , Catalasa/genética , Dieta/estadística & datos numéricos , Suplementos Dietéticos/estadística & datos numéricos , Frutas , Verduras , Adulto , Anciano , Anciano de 80 o más Años , Antioxidantes/administración & dosificación , Neoplasias de la Mama/genética , Estudios de Casos y Controles , Catalasa/metabolismo , Femenino , Frecuencia de los Genes/genética , Genotipo , Humanos , Persona de Mediana Edad , New York/epidemiología , Encuestas Nutricionales , Polimorfismo Genético/genética , Factores de Riesgo
11.
Carcinogenesis ; 26(12): 2131-7, 2005 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-16014702

RESUMEN

O(6)-methylguanine DNA methyl-transferase (MGMT) is the only known critical gene involved in cellular defense against alkylating agents in the DNA direct reversal repair (DRR) pathway. Three single nucleotide polymorphism (SNP) coding for non-conservative amino acid substitutions have been identified [C250T (Leu84Phe), A427G (Ile143Val) and A533G (Lys178Arg)]. To examine the importance of the DRR pathway in risk for breast cancer and the potential interaction with cigarette smoking and dietary antioxidants, we genotyped for these variants using biospecimens from the Long Island Breast Cancer Study Project. Genotyping was performed by a high throughput assay with fluorescence polarization and included 1067 cases and 1110 controls. Overall, there was no main effect between any variant genotype, haplotype or diplotype and breast cancer risk. Heavy smoking (>31 pack-year) significantly increased breast cancer risk for women with the codon 84 variant T-allele [odds ratio, OR = 3.0, 95% confidence interval (95% CI) = 1.4-6.2]. An inverse association between fruits and vegetables consumption and breast cancer risk was observed among women with the wild-type genotype for codon 84 (OR = 0.8, 95% CI = 0.6-0.9 for > or =35 servings of fruits and vegetables per week and CC genotype versus those with <35 servings per week and CC genotype). The association between fruits and vegetables consumption and reduced breast cancer risk was apparent among women with at least one variant allele for codon 143 (OR = 0.6, 95% CI = 0.5-0.9 for > or =35 servings of fruits and vegetables per week and AG or GG genotype versus those with <35 servings per week and AA genotype). Similar patterns were observed for dietary alpha-carotene and supplemental beta-carotene, but not for supplemental vitamins C and E. These data suggest that polymorphisms in MGMT may modulate the inverse association previously observed between fruits and vegetables consumption, dietary antioxidants and breast cancer risk, and support the importance of fruits and vegetables on breast cancer risk reduction.


Asunto(s)
Antioxidantes/metabolismo , Neoplasias de la Mama/epidemiología , Neoplasias de la Mama/genética , Dieta , O(6)-Metilguanina-ADN Metiltransferasa/genética , Polimorfismo de Nucleótido Simple , Fumar , Adulto , Anciano , Neoplasias de la Mama/metabolismo , Estudios de Casos y Controles , Suplementos Dietéticos , Femenino , Fluorescencia , Frutas , Genotipo , Haplotipos/genética , Humanos , Menopausia , Persona de Mediana Edad , New York/epidemiología , Factores de Riesgo , Verduras
12.
Cancer Epidemiol Biomarkers Prev ; 14(2): 336-42, 2005 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-15734955

RESUMEN

The variability in DNA repair capacity of the general population may depend in part upon common variants in DNA repair genes. X-ray repair cross complementing group 1 (XRCC1) is an important DNA base excision repair gene and exhibits polymorphic variation. Using the Long Island Breast Cancer Study Project, a population-based case-control study, we evaluated the hypothesis that two common single nucleotide polymorphisms of XRCC1 (codon 194 Arg-->Trp and 399 Arg-->Gln) influence breast cancer susceptibility and interact with polycyclic aromatic hydrocarbon (PAH)-DNA adducts, cigarette smoking, and intake of fruits and vegetables and antioxidants. The available sample for genotyping included 1,067 cases and 1,110 controls. Genotyping was done by a high-throughput single-nucleotide extension assay with fluorescence polarization detection of the incorporated nucleotide. We observed no significant increases in risk among all subjects who were carriers of XRCC1 194Trp or 399Gln alleles. Among never smokers, we observed an increased risk of breast cancer in 399Gln carriers [odds ratio (OR), 1.3; 95% confidence interval (CI), 1.0-1.7). Further analysis indicated a suggestive weak additive interaction between the 399Gln allele and detectable PAH-DNA adducts (OR for exposure with mutant genotype, 1.9; 95% CI, 1.2-3.1). The estimated age-adjusted interaction contrast ratio (ICR) and 95% CI (ICR, 0.38; 95% CI, -0.32 to 1.10) indicated that the departure from additivity was not statistically significant, but that there was some suggestion of a relative excess risk due to the interaction. In subjects with at least one copy of XRCC1 194Trp allele, there was a moderate interaction with high intake of fruits and vegetables (>/=35 half-cup servings per week of any fruits, fruit juices, and vegetables, OR, 0.58; 95% CI, 0.38-0.89; ICR, -0.49; 95% CI, -0.03 to -0.95), and dietary plus supplement antioxidant intake with 33% to 42% decreases in breast cancer risk compared with those with the Arg194Arg genotype and low-intake individuals. These results do not show that the two genetic polymorphisms of XRCC1 independently influence breast cancer risk. However, there is evidence for interactions between the two XRCC1 single nucleotide polymorphisms and PAH-DNA adducts or fruit and vegetable and antioxidant intake on breast cancer risk. Further understanding of the biological function of XRCC1 variants and their interactions with PAH-DNA adducts, antioxidants, and other genes in the pathway are needed.


Asunto(s)
Neoplasias de la Mama/epidemiología , Neoplasias de la Mama/genética , Proteínas de Unión al ADN/genética , Adulto , Antioxidantes/metabolismo , Neoplasias de la Mama/metabolismo , Estudios de Casos y Controles , Aductos de ADN/metabolismo , Dieta , Suplementos Dietéticos , Femenino , Genotipo , Humanos , Persona de Mediana Edad , Hidrocarburos Policíclicos Aromáticos/metabolismo , Polimorfismo de Nucleótido Simple , Factores de Riesgo , Fumar/fisiopatología , Proteína 1 de Reparación por Escisión del Grupo de Complementación Cruzada de las Lesiones por Rayos X
13.
Am J Clin Nutr ; 80(5): 1358-65, 2004 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-15531687

RESUMEN

BACKGROUND: Calcium can reduce the risk of colorectal tumors by binding secondary bile and fatty acids, which leads to antiproliferative effects in the bowel, or by acting directly on the colonic epithelium, which affects differentiation and apoptosis. OBJECTIVE: We investigated calcium intake and risk of colon adenoma to evaluate the association of calcium intake with early stages of colorectal tumor development. DESIGN: We compared the supplemental and dietary calcium intakes of 3696 participants with histologically verified adenoma of the distal colon (ie, descending colon, sigmoid colon, or rectum) with the calcium intakes of 34 817 sigmoidoscopy-negative control participants in the Prostate, Lung, Colorectal, and Ovarian Cancer Screening Trial. Calcium intake was assessed at study entry with a 137-item food-frequency questionnaire and additional questions on the amount and duration of calcium supplement use. RESULTS: After adjustment for known risk factors, adenoma risk was lower by 12% for participants in the highest quintile of total calcium intake (>1767 mg/d) than for participants in the lowest quintile (<731 mg/d) (odds ratio: 0.88; 95% CI: 0.76, 1.02; P for trend = 0.04). The protective association between total calcium and colorectal adenoma was largely due to calcium supplement use, with a 27% decrease in adenoma risk for participants taking >1200 mg/d than for nonusers of supplements (odds ratio: 0.73; 95% CI: 0.56, 0.91; P for trend = 0.005). The protective associations of total and supplemental calcium were strongest for colon adenoma (descending and sigmoid colon). CONCLUSION: High calcium intake, particularly from supplements, is associated with a reduced risk of distal colorectal adenoma.


Asunto(s)
Adenoma/prevención & control , Calcio de la Dieta/uso terapéutico , Neoplasias Colorrectales/prevención & control , Anciano , Calcio de la Dieta/administración & dosificación , Estudios de Casos y Controles , Neoplasias Colorrectales/epidemiología , Neoplasias Colorrectales/patología , Femenino , Humanos , Masculino , Persona de Mediana Edad , Ensayos Clínicos Controlados Aleatorios como Asunto , Estados Unidos/epidemiología
14.
Cancer Epidemiol Biomarkers Prev ; 13(9): 1485-94, 2004 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-15342450

RESUMEN

Whether fruit, vegetable, and antioxidant micronutrient consumption is associated with a reduction in breast cancer incidence remains unresolved. To address this issue, we analyzed data from a large population-based case-control study, with consideration given to whether the associations varied with menopausal status or with clinical characteristics of the cases' disease. Study participants completed a modified Block food frequency questionnaire, which included assessment of the frequency and portion sizes of 13 fruits and fruit juices and 16 vegetables and the use of multiple and single vitamin supplements. Statistical analyses were done on 1,463 cases and 1,500 controls. Among postmenopausal women, reduced odds ratios [OR; 95% confidence intervals (95% CI)] were noted for the highest fifth, as compared with the lowest fifth, of intake of any vegetables [0.63 (0.46-0.86); P for trend < 0.01] and leafy vegetables [0.66 (0.50-0.86); P for trend = 0.03] after controlling for age and energy intake. Adjusted ORs (95% CIs) were also decreased for postmenopausal breast cancer in relation to high intake of carotenoids, alpha-carotene, beta-carotene, lutein, and particularly lycopene [0.66 (0.48-0.90); P for trend = 0.03]. Inverse associations for fruits and vegetables were stronger for postmenopausal women with estrogen receptor (ER)+ tumors (OR, 0.65; 95% CI, 0.51-0.82) than ER- tumors (OR, 0.92; 95% CI, 0.64-1.32), but results were less consistent for micronutrients. No similarly reduced associations were observed among premenopausal women. ORs did not appreciably differ by in situ or invasive breast cancer or by whether cases had begun chemotherapy. Our results support an inverse association for fruit and vegetable intake among postmenopausal but not premenopausal breast cancer, which may be more pronounced among women with ER+ tumors.


Asunto(s)
Antioxidantes/administración & dosificación , Neoplasias de la Mama/epidemiología , Conducta Alimentaria , Frutas , Menopausia , Micronutrientes/administración & dosificación , Neoplasias Hormono-Dependientes/epidemiología , Receptores de Estrógenos/análisis , Receptores de Progesterona/análisis , Verduras , Adulto , Anciano , Mama/patología , Neoplasias de la Mama/patología , Neoplasias de la Mama/prevención & control , Carcinoma Ductal de Mama/epidemiología , Carcinoma Ductal de Mama/patología , Carcinoma Ductal de Mama/prevención & control , Carcinoma Intraductal no Infiltrante/epidemiología , Carcinoma Intraductal no Infiltrante/patología , Carcinoma Intraductal no Infiltrante/prevención & control , Estudios de Casos y Controles , Femenino , Humanos , Persona de Mediana Edad , Neoplasias Hormono-Dependientes/patología , Neoplasias Hormono-Dependientes/prevención & control , New York , Encuestas Nutricionales , Oportunidad Relativa , Factores de Riesgo
15.
J Am Diet Assoc ; 103(8): 1008-14, 2003 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-12891149

RESUMEN

OBJECTIVE: To examine the adequacy of dietary intake of calcium; folate; and vitamins C, D, E, B-6, and B-12 in premenopausal US women of differing ethnicity. DESIGN: Analyses of single and duplicate 24-hour recalls were conducted to determine dietary intake during the Third National Health and Nutrition Examination Survey. SUBJECTS: Three thousand five hundred eighty-five randomly selected women aged 20 to 50 years from across the United States who were not pregnant or lactating were examined between 1988 and 1994. STATISTICAL ANALYSES: Usual nutrient intake distributions were estimated using the Iowa State University method for adjustment of the distribution. The Estimated Average Requirement cut-point method was used to determine the proportion of women with inadequate intake for each nutrient in each ethnic group. RESULTS: More than 75% of women irrespective of ethnic group had usual intakes of calcium lower than the new Adequate Intake. More than 90% of the women had inadequate intakes of folate and vitamin E from food sources alone. More than half of smokers had inadequate intakes of vitamin C. Intakes of vitamins B-6 and B-12 were low in less than 10% of these women. APPLICATIONS/CONCLUSIONS: This article provides evidence that a high proportion of premenopausal US women are underconsuming a variety of nutrients. Dietary intakes alone are not currently adequate to meet the new recommended intakes. Nutritional supplement use is widespread and effective, but does not eliminate the concerns for at-risk populations. Awareness of the general inadequacies in intakes of vitamin E and folic acid at large, and in many women vitamin C as well, can help direct individual dietary recommendations and place the emphasis in group counseling on nutrients that are of widespread concern. In addition, foods rich in vitamins B-6 and of general nutritional benefit should be emphasized among African American women in the United States as a substantial proportion of this group is still showing inadequate intakes from foods.


Asunto(s)
Dieta , Etnicidad , Evaluación Nutricional , Adulto , Negro o Afroamericano , Calcio , Encuestas sobre Dietas , Suplementos Dietéticos , Femenino , Ácido Fólico , Hispánicos o Latinos , Humanos , Persona de Mediana Edad , Encuestas Nutricionales , Estados Unidos , Vitaminas , Población Blanca
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