Human Nutrition

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Browsing Human Nutrition by browse.metadata.advisor "Carey, Paul"

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    Heavy alcohol use in adolescents : potential influences on nutritional status
    (Stellenbosch : Stellenbosch University, 2012-03) Naude, Celeste Estelle; Senekal, Marjanne; Carey, Paul; Stellenbosch University. Faculty of Health Sciences. Dept. of Interdisciplinary Health Sciences. Human Nutrition.
    ENGLISH ABSTRACT: Introduction: Adolescents are recognised as a nutritionally at-risk group, as they have high nutritional demand for growth and development, poor eating behaviour as well as a propensity for unhealthy behaviours. Heavy alcohol use, particularly in the form of binge drinking, is typical for an alarming proportion of school-going adolescents and is a plausible contributor to the nutritional challenges in adolescents, but this has not yet been fully investigated. Aim: This study investigated the potential influences of alcohol use on the nutritional status of adolescents with alcohol use disorders (AUDs), specifically with regards to their eating behaviour and dietary intake, growth and weight status, iron status, as well as vitamin D and calcium status. Methods: Substance use, physical activity, eating behaviour, dietary intake, growth and weight status, iron status and vitamin D and calcium status were assessed and compared in heavy drinking adolescents (meeting DSM-IV criteria for AUDs) (n=81) and in light/non-drinking adolescents without AUDs (non-AUDs)(n=81), matched for age, gender, language, socio-economic status and education. Observed dietary intake distributions were adjusted statistically to obtain usual nutrient intake distributions. Regression-adjusted differences between the groups were assessed using multi-level mixed effects linear regression, adjusting for potential confounders. Results: Lifetime alcohol dose in standard drinks of alcohol was orders of magnitude higher in the AUDs group compared to the non-AUDs group. AUDs adolescents had a binge alcohol use pattern and a “weekends-only” style of alcohol consumption. Poor eating patterns (breakfast skipping and frequent snacking), poor food choices (energy-dense and nutrient-poor foods) and low fruit and vegetable intake (non-AUDs 90 [42.4-153.3]; AUDs 88.3 [30.0-153.0] grams per day) in both groups were reflected in the poor nutritional quality of the diet. More than half of adolescents in both groups were at risk of inadequate intakes of folate (non-AUDs 97.5%; AUDs 98.8%), vitamin C (non-AUDs 65%; AUDs 67.5%), vitamin A (non-AUDs 80%; AUDs 82.5%), vitamin E (non-AUDs 78.8%; AUDs 51.3%), magnesium (non-AUDs 98.8%; AUDs 97.5%), and phosphorus (non-AUDs 76.3%; AUDs 73.8%) and all participants were at risk of inadequate calcium and vitamin D intakes. AUDs adolescents had a greater intake of unhealthy foods (energy-dense nutrient-poor) and a significantly greater energy intake than non-AUDs adolescents (p<0.001) that exceeded energy requirements. AUDs adolescents consumed foods high in unhealthy fats significantly more frequently (p=0.037) than the non-AUDs adolescents and had ensuing greater total fat (p<0.001), saturated fat (p<0.001) and cholesterol (p=0.009) intakes. Frequency of intake of sodium-rich foods was significantly higher in AUDs adolescents (p=0.001) and prevalence of risk of excessive sodium intake was significantly greater in the AUDs adolescents (45%) compared to non-AUDs adolescents (18.8%) (p<0.001). Anthropometric indices of growth and weight status were comparable between the groups and in line with that of the South African adolescent population. Female AUDs adolescents had increased odds (OR 2.42) of being overweight/obese compared to non-AUDs females. Physical activity in both groups was well below the WHO global recommendation. Iron store depletion (serum ferritin < 20 μg/L) was evident in a quarter of adolescents in both groups (non-AUDs 23.5%; AUDs 24.7%), with biochemical iron status measures (serum iron and total iron binding capacity) indicating a greater risk of iron store depletion in the AUDs group. Biochemical vitamin D insufficiency/deficiency (serum 25-hydroxyvitamin D < 30 ng/mL) was prevalent in both groups (non-AUDs 70.4%; AUDs 88.8%), although this was significantly greater in the AUDs group (p=0.013), with significantly lower serum 25-hydroxyvitamin D levels in the AUDs group compared to the non-AUDs group (p=0.038). Conclusions: Heavy alcohol use in the form of binge drinking in adolescents may have the following nutrition-related influences: increased intake of energy; unhealthy fats and sodium, increased risk of overweight/obesity in females; increased risk of iron store depletion; and increased risk of vitamin D insufficiency/deficiency. Persistence of heavy alcohol use, poor food choices and dietary intake may increase the risk for adverse nutrition-related health outcomes in the AUDs adolescents.