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Yazdanpanah MH, Sharafkhah M, Poustchi H, Etemadi A, Sheikh M, Kamangar F, Pourshams A, Boffetta P, Dawsey SM, Abnet CC, Malekzadeh R, Hashemian M. Mineral Intake and Cardiovascular Disease, Cancer, and All-Cause Mortality: Findings from the Golestan Cohort Study. Nutrients 2024; 16:344. [PMID: 38337629 PMCID: PMC10857363 DOI: 10.3390/nu16030344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 01/10/2024] [Accepted: 01/12/2024] [Indexed: 02/12/2024] Open
Abstract
Associations between mineral intake and mortality in non-Western countries have not been studied adequately. This study evaluated these associations in the Golestan Cohort Study, featuring a Middle Eastern population. The mineral intake was estimated from the baseline food frequency questionnaire, adjusted by using the nutrient density method, and divided into quintiles. We used Cox proportional hazards models to estimate hazard ratios (HR) and 95% confidence intervals (CI) for the mortality. We analyzed 41,863 subjects with a mean age of 51.46 ± 8.73 years at the baseline. During 578,694 person-years of follow-up (median: 14.1 Years), 7217 deaths were recorded. Dietary calcium intake was inversely associated with the all-cause mortality (HRQ5 vs. Q1 = 0.91, 95%CI = 0.85-0.99). We observed significant associations between calcium (HRQ5 vs. Q1 = 0.82, 95% CI = 0.73-0.93), copper (HRQ5 vs. Q1 = 1.11, 95% CI = 0.99-1.26), and selenium intake (HRQ5 vs. Q1 = 1.14, 95% CI = 1.01-1.29) and CVD mortality. Dietary phosphorus (HRQ5 vs. Q1 = 0.81, 95%CI = 0.69-0.96) and copper intake (HRQ5 vs. Q1 = 0.84, 95%CI = 0.71-0.99) were inversely associated with cancer mortality. In this study within a Middle Eastern population, a higher dietary intake of calcium exhibited an inverse association with all-cause mortality. Furthermore, nuanced associations were observed in the cause-specific mortality, suggesting potential avenues for dietary interventions and emphasizing the importance of considering dietary factors in public health strategies.
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Affiliation(s)
- Mohammad Hosein Yazdanpanah
- Liver and Pancreatobiliary Diseases Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Tehran 1461884513, Iran; (M.H.Y.); (M.S.); (H.P.); (A.P.)
| | - Maryam Sharafkhah
- Liver and Pancreatobiliary Diseases Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Tehran 1461884513, Iran; (M.H.Y.); (M.S.); (H.P.); (A.P.)
| | - Hossein Poustchi
- Liver and Pancreatobiliary Diseases Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Tehran 1461884513, Iran; (M.H.Y.); (M.S.); (H.P.); (A.P.)
| | - Arash Etemadi
- Metabolic Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA; (A.E.); (S.M.D.); (C.C.A.)
| | - Mahdi Sheikh
- Genomic Epidemiology Branch, International Agency for Research on Cancer, 69366 Lyon, France;
| | - Farin Kamangar
- Department of Biology, School of Computer, Mathematical and Natural Sciences, Morgan State University, Baltimore, MD 21251, USA;
| | - Akram Pourshams
- Liver and Pancreatobiliary Diseases Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Tehran 1461884513, Iran; (M.H.Y.); (M.S.); (H.P.); (A.P.)
| | - Paolo Boffetta
- Stony Brook Cancer Center, Stony Brook University, Stony Brook, NY 11794, USA;
- Department of Medical and Surgical Sciences, University of Bologna, 40126 Bologna, Italy
| | - Sanford M. Dawsey
- Metabolic Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA; (A.E.); (S.M.D.); (C.C.A.)
| | - Christian C. Abnet
- Metabolic Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA; (A.E.); (S.M.D.); (C.C.A.)
| | - Reza Malekzadeh
- Digestive Oncology Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Tehran 1411713135, Iran
| | - Maryam Hashemian
- Epidemiology and Community Health Branch, Division of Intramural Research, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA
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Lin R, Feng W, Yang Y, Xu J, Yang H, Wu J, Li J, Qin G, Yu Y, Chen J. Association of dietary calcium with mortality from all causes, cardiovascular disease and cancer in people with hypertension. J Clin Hypertens (Greenwich) 2023; 25:480-488. [PMID: 37053089 PMCID: PMC10184480 DOI: 10.1111/jch.14657] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 03/14/2023] [Accepted: 04/02/2023] [Indexed: 04/14/2023]
Abstract
Association between calcium intake and premature mortality in the general population has been well studied, but little is known about the association among specific populations. The authors aim to evaluate the association among people with hypertension and to provide a proper reference range of dietary calcium intake. This prospective cohort study included 8534 US adults with hypertension from National Health and Nutrition Examination Survey cycles 2003-2014. Dietary calcium intakes were self-reported and mortality status was ascertained by National Death Index records. During a median follow-up of 5.9 years, 1357 death occurred. Compared with participants of dietary calcium intake in quintile 1, participants in quintiles 2 and 4 had a 27% (HR: 0.73, 95% CI: 0.60-0.89) and a 29% lower risk (HR: 0.71, 95% CI: 0.57-0.88) of all-cause mortality respectively. The authors also observed a 34% lower risk (HR: 0.66, 95% CI: 0.45-0.97) of CVD death among participants in quintile 3 and a 37% lower risk (HR: 0.63, 95% CI: 0.40-0.99) of cancer-related death in participants in quintile 4 respectively. Restricted cubic spline (RCS) regression revealed a consistent protective effect of dietary calcium in participants with a daily intake of over 1000 mg, but a daily intake over 1200 mg fails to show further protective effect. Our findings suggest that elevated dietary calcium was associated with lower mortality risk from all-causes, cardiovascular disease (CVD) and cancer, and supplying sufficient dietary calcium intake, between 1000 and 1200 mg per day, in people with hypertension may be considered cost-effective to decrease risk of premature death.
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Affiliation(s)
- Ruilang Lin
- Department of Biostatistics, School of Public Health, The Key Laboratory of Public Health Safety of Ministry of Education, Fudan University, Shanghai, China
| | - Wen Feng
- Department of Pre-treatment, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yating Yang
- Department of Biostatistics, School of Public Health, The Key Laboratory of Public Health Safety of Ministry of Education, Fudan University, Shanghai, China
| | - Jiaqin Xu
- Department of Biostatistics, School of Public Health, The Key Laboratory of Public Health Safety of Ministry of Education, Fudan University, Shanghai, China
| | - Hui Yang
- Department of Biostatistics, School of Public Health, The Key Laboratory of Public Health Safety of Ministry of Education, Fudan University, Shanghai, China
| | - Jingyi Wu
- Department of Biostatistics, School of Public Health, The Key Laboratory of Public Health Safety of Ministry of Education, Fudan University, Shanghai, China
| | - Jiong Li
- Department of Clinical Medicine-Department of Clinical Epidemiology, Aarhus University, Aarhus, Denmark
| | - Guoyou Qin
- Department of Biostatistics, School of Public Health, The Key Laboratory of Public Health Safety of Ministry of Education, Fudan University, Shanghai, China
- Shanghai Institute of Infectious Disease and Biosecurity, Shanghai, China
| | - Yongfu Yu
- Department of Biostatistics, School of Public Health, The Key Laboratory of Public Health Safety of Ministry of Education, Fudan University, Shanghai, China
- Shanghai Institute of Infectious Disease and Biosecurity, Shanghai, China
| | - Jiaohua Chen
- Department of Health Management, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai, China
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Yoo JY, Cho HJ, Lee JE. Lower dietary calcium intake is associated with a higher risk of mortality in Korean adults. J Acad Nutr Diet 2022; 122:2072-2086. [DOI: 10.1016/j.jand.2022.02.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 01/05/2022] [Accepted: 02/20/2022] [Indexed: 11/24/2022]
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Shkembi B, Huppertz T. Calcium Absorption from Food Products: Food Matrix Effects. Nutrients 2021; 14:nu14010180. [PMID: 35011055 PMCID: PMC8746734 DOI: 10.3390/nu14010180] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 12/23/2021] [Accepted: 12/28/2021] [Indexed: 12/14/2022] Open
Abstract
This article reviews physicochemical aspects of calcium absorption from foods. Notable differences are observed between different food products in relation to calcium absorption, which range from <10% to >50% of calcium in the foods. These differences can be related to the interactions of calcium with other food components in the food matrix, which are affected by various factors, including fermentation, and how these are affected by the conditions encountered in the gastrointestinal tract. Calcium absorption in the intestine requires calcium to be in an ionized form. The low pH in the stomach is critical for solubilization and ionization of calcium salts present in foods, although calcium oxalate complexes remain insoluble and thus poorly absorbable. In addition, the rate of gastric transit can strongly affect fractional absorption of calcium and a phased release of calcium into the intestine, resulting in higher absorption levels. Dairy products are the main natural sources of dietary calcium in many diets worldwide, which is attributable to their ability to provide high levels of absorbable calcium in a single serving. For calcium from other food products, lower levels of absorbable calcium can limit contributions to bodily calcium requirements.
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Affiliation(s)
- Blerina Shkembi
- Food Quality & Design Group, Wageningen University & Research, 6708 WG Wageningen, The Netherlands;
| | - Thom Huppertz
- Food Quality & Design Group, Wageningen University & Research, 6708 WG Wageningen, The Netherlands;
- FrieslandCampina, 3818 LE Amersfoort, The Netherlands
- Correspondence:
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Park S, Kang S. Alcohol, Carbohydrate, and Calcium Intakes and Smoking Interactions with APOA5 rs662799 and rs2266788 were Associated with Elevated Plasma Triglyceride Concentrations in a Cross-Sectional Study of Korean Adults. J Acad Nutr Diet 2020; 120:1318-1329.e1. [PMID: 32335043 DOI: 10.1016/j.jand.2020.01.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Accepted: 01/14/2020] [Indexed: 12/23/2022]
Abstract
BACKGROUND Plasma triglyceride (TG) concentrations are markedly higher among Asians, which may be associated with the interaction of genetics and lifestyle factors. OBJECTIVE The purpose of this study was to investigate the genetic variants that have a strong association with plasma TG concentrations from genome-wide association study and to identify lifestyle interactions with the genetic variants that are associated with dyslipidemia in a cohort of Korean adults. DESIGN Korean genome and epidemiology study utilized a cross-sectional design of Koreans to determine genetic variants and lifestyle factors, including nutrient intakes, in a retrospective hospital-based city cohort conducted by the Korean Center for Disease and Control during 2004-2013. PARTICIPANTS Korean adults aged 40 to 77 years were participants (n=28,445). MAIN OUTCOME MEASURES The genetic variants that influence plasma TG concentrations were selected by genome-wide association study using an allele genetic model after adjusting for age, sex, area of residence, and body mass index. Lipid profiles and nutrient intakes from food frequency questionnaires were measured. The interactions between the single nucleotide polymorphisms and lifestyle factors were determined to influence plasma TG levels. RESULTS Carrying the minor alleles of APOA5 rs662799 and rs2266788 had an association with higher plasma TG concentrations by 1.86- and 1.51-fold, respectively, compared with those with the major allele (P=8.89E-150 and P=4.75E-68, respectively). Sex had an interaction with these single nucleotide polymorphisms, with males having higher plasma TG concentrations. The single nucleotide polymorphisms had significant interactions with carbohydrate, fat, and calcium intakes; alcohol consumption; and smoking status that were associated with plasma TG concentrations. Carriers with the minor allele of each single nucleotide polymorphisms had higher plasma TG concentrations when consuming-low fat (<15%) and high carbohydrate (≥72%) diets than those with major alleles. Carriers of the minor alleles with low calcium intakes (<500 mg/day) experienced elevated plasma TG concentrations compared with carriers of the major alleles. Smokers and alcohol drinkers with either of the minor alleles of APOA5, rs662799 or rs2266788, had higher plasma TG concentrations than those with its major allele. CONCLUSIONS These results indicated that carrying the minor alleles of APOA5 rs662799 and rs2266788, especially for men, was associated with elevated TG concentrations and suggested that Korean carriers of the minor alleles could be at increased risk of hypertriglyceridemia. Further research is needed to investigate the efficacy of modulating lifestyle factors to prevent dyslipidemia in people carrying the minor alleles of APOA5 rs662799 and rs2266788.
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Sukumar D, Becker KB, Cheung M, Diamond S, Duszak R, Aljahdali A, Volpe SL, Nasser JA. Can bone-regulating hormones and nutrients help characterize the metabolically healthy obese phenotype. Nutr Health 2018; 24:153-162. [PMID: 29950143 DOI: 10.1177/0260106018777336] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
BACKGROUND: Bone-regulating hormones and nutrients play an important role in influencing metabolic health. AIM: The aim of this study was to determine whether bone-regulating hormones and nutrients, such as parathyroid hormone (PTH), 25-hydroxyvitamin D (25OHD), and magnesium (Mg) could be used to characterize the metabolically healthy obese (MHO) phenotype. METHODS: This study included 27 overweight or obese participants (14 men/13 women) classified as MHO ( n = 14) or metabolically unhealthy obese (MUO) ( n = 13) based on the presence or absence of metabolic abnormalities, determined by percentage body fat, percentage trunk fat, and waist circumference. Biochemical (serum concentrations of hormones and cytokines such as PTH, 25OHD, ionized Mg (iMg), cytokines, lipids, glycemic indices), physiological (percentage body fat, percentage trunk fat, blood pressure (BP)), and dietary intake (Mg intake, calcium intake) measurements were obtained. RESULTS: Serum PTH concentrations were significantly lower ( p = 0.005) in the MHO group (39.68 ± 11.06 pg/mL) compared with the MUO group (63.78 ± 25.82 pg/mL). Serum iMg concentrations were higher ( p = 0.052) in the MHO group (0.565 ± 0.41 mmol/L) than in the MUO group (0.528 ± 0.050 mmol/L). Serum concentrations of osteocalcin were also higher (10.37 ± 3.70 ng/mL) in the MHO compared with the MUO (6.51 ± 4.14 ng/mL) group ( p = 0.017). The MHO group had significantly lower serum insulin concentrations ( p = 0.006) and diastolic BP ( p = 0.035). Concentrations of serum 25OHD, total triglycerides, C-reactive protein and systolic BP did not differ between groups. CONCLUSIONS: These findings suggest that bone-regulating hormones and nutrients, especially serum PTH, osteocalcin concentrations, and dietary Mg intakes, can help to characterize the MHO phenotype.
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Affiliation(s)
- Deeptha Sukumar
- 1 Department of Nutrition Sciences, College of Nursing and Health Professions, Drexel University, Philadelphia, USA
| | - Kendra B Becker
- 1 Department of Nutrition Sciences, College of Nursing and Health Professions, Drexel University, Philadelphia, USA
| | - May Cheung
- 1 Department of Nutrition Sciences, College of Nursing and Health Professions, Drexel University, Philadelphia, USA
| | - Samantha Diamond
- 1 Department of Nutrition Sciences, College of Nursing and Health Professions, Drexel University, Philadelphia, USA
| | - Rittane Duszak
- 1 Department of Nutrition Sciences, College of Nursing and Health Professions, Drexel University, Philadelphia, USA
| | - Abeer Aljahdali
- 1 Department of Nutrition Sciences, College of Nursing and Health Professions, Drexel University, Philadelphia, USA
| | - Stella L Volpe
- 1 Department of Nutrition Sciences, College of Nursing and Health Professions, Drexel University, Philadelphia, USA
| | - Jennifer A Nasser
- 1 Department of Nutrition Sciences, College of Nursing and Health Professions, Drexel University, Philadelphia, USA
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Magalhães EIDS, Pessoa MC, Franceschini SDCC, Novaes JF. Dietary calcium intake is inversely associated with blood pressure in Brazilian children. Int J Food Sci Nutr 2016; 68:331-338. [DOI: 10.1080/09637486.2016.1236075] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Elma Izze da Silva Magalhães
- Postgraduate Program in Epidemiology, Department of Social Medicine, Federal University of Pelotas, Pelotas, Rio Grande do Sul, Brazil
| | - Milene Cristine Pessoa
- Department of Nutrition, School of Nursing, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | | | - Juliana Farias Novaes
- Postgraduate Program in Nutrition Science, Department of Nutrition and Health, Federal University of Viçosa, Viçosa, Minas Gerais, Brazil
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Karatzi K, Aissopou EK, Tsirimiagou C, Fatmeli E, Sfikakis PP, Protogerou AD. Association of consumption of dairy products and meat with retinal vessel calibers in subjects at increased cardiovascular risk. Nutr Metab Cardiovasc Dis 2016; 26:752-757. [PMID: 27139515 DOI: 10.1016/j.numecd.2016.03.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2015] [Revised: 03/10/2016] [Accepted: 03/10/2016] [Indexed: 11/26/2022]
Abstract
BACKGROUND AND AIMS Association of dairy products and meat consumption with macrocirculation is previously described, but such association with microcirculation is poorly investigated. We aimed to test the hypothesis that the consumption of high- and low-fat dairy products as well as red, white, and processed meat is associated with retinal vessel calibers in adults at an increased risk of cardiovascular disease (CVD). METHODS AND RESULTS In consecutive subjects (n = 181, age: 51.3 ± 12.4 years, 51.4% women) without CVD and diabetes mellitus but with increased CVD risk, we obtained digital left and right retinal images. These images were assessed with validated software to determine central retinal arteriolar and venular equivalents and the arteriolar to venular ratio (CRAE, CRVE, and AVR, respectively). The consumption of dairy products and meat was assessed through 24-h recalls in all volunteers. After adjustment for potential confounders, the following findings were obtained: (i) low-fat milk and yogurt were positively associated with CRAE (b=0.145, p=0.031 left; b=0.141, p=0.038 right) and inversely associated with CRVE (b=-0.155, p=0.026 left; b=-0.146, p=0.041 right); (ii) low-fat cheese was positively associated with CRAE (b=0.164, p=0.011 left and b=0.155, p=0.017 right); and (iii) red meat was inversely associated with CRAE (b=-0.143, p=0.032 left; b=-0.114, p=0.050 right). High-fat milk, yogurt, and cheese or white and processed meat were not found to be associated with retinal vessel calibers. CONCLUSIONS High consumption of low-fat milk, yogurt, and cheese and low consumption of red meat could be beneficial for retinal microvascular health. Prospective studies are needed to verify these findings.
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Affiliation(s)
- K Karatzi
- Department of Nutrition and Dietetics, Harokopio University of Athens, Athens, Greece; Hellenic Foundation for Cardiovascular Health and Nutrition, Athens, Greece.
| | - E K Aissopou
- Hellenic Foundation for Cardiovascular Health and Nutrition, Athens, Greece; Cardiovascular Unit, 1st Department of Propaedeutic Medicine, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - C Tsirimiagou
- Department of Nutrition and Dietetics, Harokopio University of Athens, Athens, Greece
| | - E Fatmeli
- Department of Nutrition and Dietetics, Harokopio University of Athens, Athens, Greece
| | - P P Sfikakis
- Cardiovascular Unit, 1st Department of Propaedeutic Medicine, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - A D Protogerou
- Hellenic Foundation for Cardiovascular Health and Nutrition, Athens, Greece; Cardiovascular Unit, 1st Department of Propaedeutic Medicine, Medical School, National and Kapodistrian University of Athens, Athens, Greece
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Dairy products and the French paradox: Could alkaline phosphatases play a role? Med Hypotheses 2016; 92:7-11. [DOI: 10.1016/j.mehy.2016.04.033] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Accepted: 04/17/2016] [Indexed: 12/13/2022]
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Mirmiran P, Golzarand M, Bahadoran Z, Mirzaei S, Azizi F. High-fat dairy is inversely associated with the risk of hypertension in adults: Tehran lipid and glucose study. Int Dairy J 2015. [DOI: 10.1016/j.idairyj.2014.11.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Chen Y, Strasser S, Cao Y, Wang KS, Zheng S. Calcium intake and hypertension among obese adults in United States: associations and implications explored. J Hum Hypertens 2015; 29:541-7. [DOI: 10.1038/jhh.2014.126] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Revised: 11/18/2014] [Accepted: 12/03/2014] [Indexed: 01/11/2023]
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Chan R, Leung J, Woo J. A prospective cohort study examining the associations of dietary calcium intake with all-cause and cardiovascular mortality in older Chinese community-dwelling people. PLoS One 2013; 8:e80895. [PMID: 24224062 PMCID: PMC3818304 DOI: 10.1371/journal.pone.0080895] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Accepted: 10/18/2013] [Indexed: 11/28/2022] Open
Abstract
Background Most epidemiological studies of calcium intake and mortality risk have been conducted in populations with moderate to high calcium intake, and limited studies have focused on populations with low habitual calcium intake (i.e., mean dietary calcium intake <700 mg/d). Objective This study investigated the association between dietary calcium intake and death from all causes and cardiovascular disease in Chinese population with low habitual calcium intake. Design Data from 3,139 Chinese men and women in a population-based prospective cohort study, aged >=65 years and free of heart diseases or stroke at baseline, were analyzed. Primary outcome measures, identified from the death registry, were death from all causes and cardiovascular disease. Dietary calcium intake assessed using a validated food frequency questionnaire was categorized into sex-specific quartiles. Data on use of supplemental calcium (yes or no) including individual calcium supplements and other calcium containing supplement were collected. Cox regression models adjusted for demographic and lifestyle variables were used to estimate hazard ratios (HRs) and 95% confidence intervals (CI). Results During a median of 9.1 years of follow-up, 529 all-cause deaths (344 men, 185 women) and 114 (74 men, 40 women) deaths from cardiovascular disease were identified. An inverse trend between dietary calcium intake and mortality was observed. Compared with the lowest quartile (<458 mg/d for men, <417 mg/d for women), the highest quartile of dietary calcium intake (>762 mg/d for men, >688 mg/d for women) had a significantly reduced risk of all-cause mortality (multivariate HR=0.63, 95% CI=0.49-0.81, Ptrend<0.001) but an insignificant decreased risk of cardiovascular mortality (multivariate HR=0.70, 95% CI=0.41-1.21, Ptrend=0.228). Similar inverse association was observed when the analyses were stratified on calcium supplemental use. Conclusions Higher intake of dietary calcium was associated with reduced risk of all-cause mortality and possibly cardiovascular mortality in Chinese older people with low habitual calcium intake.
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Affiliation(s)
- Ruth Chan
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong SAR
- * E-mail:
| | - Jason Leung
- Jockey Club Centre for Osteoporosis Care and Control, The Chinese University of Hong Kong, Hong Kong SAR
| | - Jean Woo
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong SAR
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