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Kubuga CK, Hong HG, Song WO. Hibiscus sabdariffa Meal Improves Iron Status of Childbearing Age Women and Prevents Stunting in Their Toddlers in Northern Ghana. Nutrients 2019; 11:nu11010198. [PMID: 30669431 PMCID: PMC6357016 DOI: 10.3390/nu11010198] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 01/15/2019] [Accepted: 01/15/2019] [Indexed: 02/06/2023] Open
Abstract
Globally, iron deficiency (ID) is the most common form of nutritional deficiency, particularly in young children and childbearing age women. ID can lead to stunting and impaired cognitive development in children, as well as adverse maternal health and birth outcomes. In this study, the efficacy of an alternative food-to-food fortification utilizing indigenous iron-rich food sources was investigated in a quasi-experimental study. Childbearing age women (15–49 years, intervention-Kassena Nankana West district: n = 60; control-Builsa North district: n = 60) and their toddlers (6–24 months) consumed Hibiscus sabdariffa leaf meals (HSM, 1.71 mg Fe/100 g meal) three times a week for 12 weeks during the dry/lean season in Northern Ghana. We found that feeding the HSM (1.9 kg/day) improved iron status of women of childbearing age with time (p = 0.011), and protected stunting among toddlers during the dry/lean season (p = 0.024), which is the period with the worst food and nutrition insecurity. Compared with the control group, the number of stunted toddlers declined in the intervention group.
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Affiliation(s)
| | - Hyokyoung Grace Hong
- Department of Statistics and Probability, Michigan State University, EL, MI 48824, USA.
| | - Won O Song
- Food Science and Human Nutrition Department, Michigan State University, EL, MI 48824, USA.
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Cho H, Hong HG, Kim MO. Efficient quantile marginal regression for longitudinal data with dropouts. Biostatistics 2016; 17:561-75. [PMID: 26951723 DOI: 10.1093/biostatistics/kxw007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2015] [Accepted: 12/28/2015] [Indexed: 11/14/2022] Open
Abstract
In many biomedical studies independent variables may affect the conditional distribution of the response differently in the middle as opposed to the upper or lower tail. Quantile regression evaluates diverse covariate effects on the conditional distribution of the response with quantile-specific regression coefficients. In this paper, we develop an empirical likelihood inference procedure for longitudinal data that accommodates both the within-subject correlations and informative dropouts under missing at random mechanisms. We borrow the matrix expansion idea of the quadratic inference function and incorporate the within-subject correlations under an informative working correlation structure. The proposed procedure does not assume the exact knowledge of the true correlation structure nor does it estimate the parameters of the correlation structure. Theoretical results show that the resulting estimator is asymptotically normal and more efficient than one attained under a working independence correlation structure. We expand the proposed approach to account for informative dropouts under missing at random mechanisms. The methodology is illustrated by empirical studies and a real-life example of HIV data analysis.
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Affiliation(s)
- Hyunkeun Cho
- Department of Statistics, Western Michigan University, Kalamazoo, MI 49008, USA
| | - Hyokyoung Grace Hong
- Department of Statistics and Probability, Michigan State University, East Lansing, MI 48824, USA
| | - Mi-Ok Kim
- Division of Biostatistics and Epidemiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA
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Feng Y, Ma L, Liu L, Hong HG, Zhang X, Guo F, Huang R, Shi M, Li Y, Zhang L, Fu P. Rhabdomyolysis induced AKI via the regulation of endoplasmic reticulum stress and oxidative stress in PTECs. RSC Adv 2016. [DOI: 10.1039/c6ra18865f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Mechanism for the role of ER stress and oxidative stress activation in rhabdomyolysis-associated AKI.
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Lee HC, Erasmus MA, Swanson JC, Hong HG, Kang I. Improvement of turkey breast meat quality and cooked gel functionality using hot-boning, quarter sectioning, crust-freeze-air-chilling and cold-batter-mincing technologies. Poult Sci 2015; 95:138-43. [PMID: 26527709 DOI: 10.3382/ps/pev313] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/27/2015] [Indexed: 11/20/2022] Open
Abstract
The effect of rapid carcass chilling on breast meat quality was evaluated using commercial (COMM) and random-bred (RB) turkeys. Immediately after slaughter, 48 turkeys from COMM or RB line were randomly subjected to one of four chilling methods: 1) water-immersion chilling (WIC) of the carcasses at 0°C ice slurry, 2) WIC after temperature abuse (TA) of the carcasses at 40°C for 30 min (TA-WIC), 3) hot-boning, quarter sectioning, and crust-freeze-air-chilling (HB-(1)/4CFAC) of breast fillets at -12°C, and 4) HB-(1)/4CFAC of fillets after TA of carcasses (TA-HB-(1)/4CFAC). The TA increased carcass and fillet temperatures by ∼1.3 and ∼4.1°C, respectively, regardless of turkey line, whereas HB-(1)/4CFAC of fillets required 28 and 33% of carcass chilling time for COMM and RB, respectively. During chilling, COMM breast pH rapidly reduced from 6.04 to 5.82, resulting in a significantly lower pH than RB after chilling (P < 0.05), whereas COMM R-value sharply increased from 1.17 to 1.43, causing no difference from RB (P > 0.05). Significantly higher L* value and cooking yield (P < 0.05) were seen in the samples of TA and WIC than those of no TA and HB-(1)/4CFAC, respectively, with no difference observed between COMM and RB fillets (P > 0.05). Higher values of hardness, gumminess, and chewiness were found for RB, no TA, and HB-(1)/4CFAC gels than COMM, TA, and WIC, respectively. These results generally indicated that protein quality and textural properties of turkey fillets were improved, regardless of strains or temperature abuse, using HB-(1)/4CFAC technology.
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Affiliation(s)
- H C Lee
- Departments of Animal Science
| | | | | | - H G Hong
- Statistics and Probability, Michigan State University, East Lansing, MI 48824
| | - I Kang
- Departments of Animal Science Food Science & Human Nutrition
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Cognetta AB, Howard BM, Heaton HP, Stoddard ER, Hong HG, Green WH. Superficial x-ray in the treatment of basal and squamous cell carcinomas: A viable option in select patients. J Am Acad Dermatol 2012; 67:1235-41. [DOI: 10.1016/j.jaad.2012.06.001] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2012] [Revised: 05/25/2012] [Accepted: 06/05/2012] [Indexed: 10/28/2022]
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Abstract
High expenditure on healthcare is an important segment of the U.S. economy, making healthcare cost modelling valuable in decision-making processes over a wide array of domains. In this paper, we analyze medical expenditure panel survey (MEPS) data. Tobit regression model has been popularly used for the medical expenditures. However, it is no longer sufficient for the MEPS data because: (i) the distribution of the expenditures shows skewness, heavy tails and heterogeneity; (ii) most predictors are categorical, including binary, nominal and ordinal variables; (iii) there are a few predictors which may be nonlinearly related to the response. We therefore propose a Bayesian Tobit quantile regression model to describe a complete distributional view on how the medical expenditures depend on the various predictors. Specifically, we assume an asymmetric Laplace error distribution to adapt the quantile regression to a Bayesian setting. Then, we propose a modified group Lasso for categorical factor selection, and a smoothing Gaussian prior for modelling the nonlinear effects. The estimates and their uncertainties are obtained using an efficient Monte Carlo Markov Chain sampling method. The effectiveness of our approach is demonstrated by modelling 2007 MEPS data.
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Affiliation(s)
- Yu Ryan Yue
- Zicklin School of Business, Baruch College, The City University of New York, New York
| | - Hyokyoung Grace Hong
- Zicklin School of Business, Baruch College, The City University of New York, New York
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Abstract
Considerable clinical and empirical evidence has accumulated over the past decades indicating that there is a strong association between childhood maltreatment and heavy episodic drinking in adolescence, but there is a paucity of empirically based knowledge about the processes linking the association. The aim of this paper is to examine mechanisms that might account for the association between childhood maltreatment and heavy episodic drinking in adolescence. Using a nationally representative sample of adolescents (ages ranging 12-21; N = 6,337), this study examined the role of individual self-regulatory processes in the associations, controlling for age, gender, race/ethnicity, peer substance use, parental alcoholism, and parent-child conflict. Factor analyses were used to test the measurement structure of self-regulatory processes. Findings confirmed the association between childhood maltreatment and heavy episodic drinking in adolescence. Structural modeling analyses indicated indirect effects for childhood maltreatment primarily through poor self-regulatory processes and peer substance use. Implications for future research are discussed.
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Affiliation(s)
- Sunny Hyucksun Shin
- School of Social Work, Boston University, 264 Bay State Road, Boston, MA 02215, USA.
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Affiliation(s)
- Hyokyoung Grace Hong
- Hyokyoung Grace Hong is Assistant Professor, Department of Statistics and CIS, The Baruch College of the City University of New York . Xuming He is Professor, Department of Statistics, University of Illinois at Urbana–Champaign, Champaign, IL 61820 . The research is partially supported by NSF grant DMS-0604229, NIH grant R01GM080503-01A1, U.S.A., National Natural Science Foundation of China grant 10828102, and a Changjiang Visiting Professorship at the Northeast Normal University, China. We thank the
| | - Xuming He
- Hyokyoung Grace Hong is Assistant Professor, Department of Statistics and CIS, The Baruch College of the City University of New York . Xuming He is Professor, Department of Statistics, University of Illinois at Urbana–Champaign, Champaign, IL 61820 . The research is partially supported by NSF grant DMS-0604229, NIH grant R01GM080503-01A1, U.S.A., National Natural Science Foundation of China grant 10828102, and a Changjiang Visiting Professorship at the Northeast Normal University, China. We thank the
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Abstract
Research has shown that personality traits associated with impulsivity influence alcohol use during emerging adulthood, yet relatively few studies have examined how distinct facets of impulsivity are associated with alcohol use and abuse. We examine the influence of impulsivity traits on four patterns of alcohol use including frequency of alcohol use, alcohol-related problems, binge drinking, and alcohol use disorders (AUDs) in a community sample of young individuals (N=190). In multivariate regression analyses that controlled for peer and parental alcohol use, psychological distress, and developmental correlates (i.e., college, marriage, employment) in emerging adulthood, we found that urgency and sensation seeking were consistently related to all four constructs of alcohol use. The present study suggests that distinct impulsivity traits may play different roles in escalation of alcohol use and development of AUDs during emerging adulthood.
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Affiliation(s)
- Sunny Hyucksun Shin
- Boston University School of Social Work, 264 Bay State Road, Boston, MA 02215, USA.
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Shin SH, Hong HG, Hazen AL. Childhood sexual abuse and adolescent substance use: a latent class analysis. Drug Alcohol Depend 2010; 109:226-35. [PMID: 20197217 DOI: 10.1016/j.drugalcdep.2010.01.013] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2009] [Revised: 12/11/2009] [Accepted: 01/20/2010] [Indexed: 11/26/2022]
Abstract
Children who have exposure to child sexual abuse (CSA) are at particular risk for developing substance abuse in adolescence, but the extent to which CSA may shape patterns of adolescent substance use remains uncertain. The aim of this paper is to characterize the variations in patterns of adolescent substance use and to examine the association between CSA and qualitatively distinct patterns of adolescent substance use. Latent class analyses identified homogenous groups of adolescents with similar patterns of substance use using a sample of 1019 adolescents (mean age: 15.9 years; range: 13-18) who were selected from five publicly funded service systems. Different patterns of latent class structures were identified in boys and girls (a 4-class solution for girls and a 3-class solution for boys). CSA was associated with an increased risk of being a heavy polysubstance user in girls, even after adjustment of age, race/ethnicity, parental substance use, sibling use, peer use, psychopathology and other forms of childhood maltreatment including physical abuse and neglect. Findings indicate that female victims of CSA who are involved with public service systems are at high risk for developing multiple-substance use in adolescence.
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Affiliation(s)
- Sunny Hyucksun Shin
- Boston University School of Social Work, 264 Bay State Road, Boston University, Boston, MA 02215, USA.
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