Johanna H Nel
Biographic Data
| ID | 7550713 |
|---|---|
| NAME | Johanna H Nel |
| GIVEN NAMES | Johanna H |
| FAMILY NAME | Nel |
| SIGNATURE | NEL J H |
| AFFILIATIONS | Stellenbosch University |
| ORCID | 0000-0002-0263-0116 |
| VERIFIED | Yes |
| TOTAL WORKS | 18 |
| TOTAL CITATIONS | 3 |
| AUTHOR COUNT | 18 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2001 |
| LATEST PUBLICATION YEAR | 2025 |
| H-INDEX | 1 |
Prevalence and socio-demographic predictors of malnutrition in under 5-year-olds in the Western Cape, South Africa
Nutrition policies and regulations promulgated in South Africa to address malnutrition in young children are implemented by the nine provincial governments. To facilitate malnutrition management at provincial level, robust provincial statistics for malnutrition and associated risk factors should be available. We set out to obtain this information for the Western Cape province. We surveyed 1214 under 5-year-olds, measured their weight and height/l…
Has Food Security and Nutritional Status Improved in Children 1–<10 Years in Two Provinces of South Africa between 1999 (National Food Consumption Survey) and 2018 (Provincial Dietary Intake Study (PD…
The 1999 National Food Consumption Survey in South Africa showed that food insecurity (hunger) was prevalent in households with children aged one to <10 years. A repeat of the survey in two provinces: Gauteng (GTG) and the Western Cape (WC) was undertaken in 2018. Results showed that in all domains (living areas) in GTG, food shortage prevalence decreased between 1999 and 2018, from 55.0% to 29.6% in urban informal areas, from 34.1% to 19.4% in u…
The Nutrition Transition and the Double Burden of Malnutrition in Sub-Saharan African Countries: How Do These Countries Compare With the Recommended Lancet Commission Global Diet
SSA countries are in different stages of the nutrition transition. By superimposing clusters generated using macronutrient intake values on a map of the climatic regions in Africa, one can clearly see the importance of climate on the availability of food and food intake patterns. Climate change presents a great challenge to healthy eating, as the link between climate regions and diets is illustrated
Dietary Practices and Adolescent Obesity in Secondary School Learners at Disadvantaged Schools in South Africa: Urban–Rural and Gender Differences
South Africa has a high prevalence of obesity in black female adolescents and a paucity of knowledge regarding contributing dietary practices. The aim of this study was to assess the dietary practices and weight status of male and female adolescents at secondary schools in the Eastern Cape province in urban and rural areas. Sixteen schools and grade 8-12 learners (N = 1360) were randomly selected from three health districts comprising poor disadv…
Provincial Dietary Intake Study (PDIS): Micronutrient Intakes of Children in a Representative/Random Sample of 1- to <10-Year-Old Children in Two Economically Active and Urbanized Provinces in South A…
In 1999, the National Food Consumption Survey found serious risk of dietary deficiency for a number of micronutrients in 1- to 9-year-old children in South Africa. To address these shortfalls, fortification with vitamin A, thiamine, riboflavin, niacin, vitamin B6, folic acid, iron and zinc of maize meal and bread flour was made mandatory in 2003. The aim of this study was to examine micronutrient intakes of 1- to <10-year-old children after nearl…
Provincial Dietary Intake Study (PDIS): Energy and Macronutrient Intakes of Children in a Representative/Random Sample of 1–<10-Year-Old Children in Two Economically Active and Urbanized Provinces in …
In 1999, the National Food Consumption Survey found serious risk of dietary deficiency for a number of micronutrients in 1- to 9-year-old children in South Africa. To address these shortfalls, fortification with vitamin A, thiamine, riboflavin, niacin, vitamin B6, folic acid, iron and zinc of maize meal and bread flour was made mandatory in 2003. The aim of this study was to examine micronutrient intakes of 1- to <10-year-old children after nearl…
Provincial Dietary Intake Study (PDIS): Prevalence and Sociodemographic Determinants of the Double Burden of Malnutrition in A Representative Sample of 1 to Under 10-Year-Old Children from Two Urbaniz…
The objective of this study was to determine the prevalence and socio-demographic predictors of malnutrition in two urbanized economically active provinces (Gauteng N = 733, Western Cape N = 593) in South Africa. A multistage stratified cluster random sampling design was applied. Fieldworkers visited homes, measured children aged 1- +2 SD ≤ +3 SD] and 7.0% obese (BAZ > +3 SD). In 5- 1 (OR 2.39), while being in the third wealth quintile was protec…
The HealthKick Study: Modifiable Lifestyle Factors in Primary Caregivers of Primary School Learners from Two School Districts in the Western Cape Province, South Africa
Caregivers of children in the HK study population presented with a large number of modifiable health risk behaviors. These results highlight the importance of engaging caregivers, as part of a whole school intervention, to promote healthy eating and physical activity
Overweight among children decreased, but obesity prevalence remained high among women in South Africa, 1999–2005
Objective The aim of the present study was to assess anthropometric status in South African children and women in 2005 in order to document temporal trends in selected anthropometric parameters. Design Heights and weights were measured in a cross-sectional study of children aged 1–9 years and women aged 16–35 years. The WHO reference values and BMI cut-off points were used to determine weight status. Setting South Africa, representative sample ba…
Development of a performance-rating scale for a nutrition knowledge test developed for adolescents
Objective The objectives of the present study were to (i) develop and validate a norm-referenced performance-rating scale to interpret a nutrition knowledge test developed for urban adolescents and (ii) develop a prototype for other researchers to follow when developing nutrition knowledge tests. Design For norm development the nutrition knowledge test (questionnaire) was administered to a sample representative of the questionnaire target group, …
A questionnaire for screening the micronutrient intake of economically active South African adults
Objective The aim of the present study was to develop (phase 1) and validate (phase 2) a screening questionnaire to assess the adequacy of micronutrient intake of economically active South African adults. Design For identification of indicator foods to be included in the screening questionnaire (phase 1), a comprehensive, eighty-six-item, quantified FFQ that reflected the food sources of thirteen selected micronutrients associated with the nutrit…
National fortification of staple foods can make a significant contribution to micronutrient intake of South African adults
Background A national survey found that micronutrient deficiencies are prevalent in South African children, particularly calcium, iron, zinc, riboflavin, niacin, vitamin B6, folate, vitamin A, E and C. Mandatory fortification of maize meal and wheat flour were introduced in 2003 to combat some of the deficiencies found in children. To date however, there has not been a national survey on dietary intake in adults. Objectives The main objectives of…
Development and validation of a short questionnaire to assess sodium intake
Objectives To develop and validate a short food-frequency questionnaire to assess habitual dietary salt intake in South Africans and to allow classification of individuals according to intakes above or below the maximum recommended intake of 6 g salt day −1 . Design Cross-sectional validation study in 324 conveniently sampled men and women. Methods Repeated 24-hour urinary Na values and 24-hour dietary recalls were obtained on three occasions. Fo…
Food variety and dietary diversity scores in children: Are they good indicators of dietary adequacy
Objective To assess whether a food variety score (FVS) and/or a dietary diversity score (DDS) are good indicators of nutrient adequacy of the diet of South African children. Methods Secondary data analyses were undertaken with nationally representative data of 1–8-year-old children (n = 2200) studied in the National Food Consumption Study in 1999. An average FVS (mean number of different food items consumed from all possible items eaten) and DDS …
Development of a novel nutrition screening tool for use in elderly South Africans
Objective To develop a nutrition screening tool for use in older South Africans. Design A cross-sectional validation study in 283 free-living and institutionalised black South Africans (60+ years). Methods Trained fieldworkers administered a 24-hour recall and the Mini Nutritional Assessment (MNA) screening tool, and performed anthropometric measurements and physical function tests. Cognitive function was assessed using a validated version of the…
The National Food Consumption Survey (NFCS): South Africa, 1999
Objective The aim of the National Food Consumption Survey (NFCS) in South Africa was to determine the nutrient intakes and anthropometric status of children (1–9 years old), as well as factors that influence their dietary intake. Design This was a cross-sectional survey of a nationally representative sample of all children aged 1–9 years in South Africa. A nationally representative sample with provincial representation was selected using 1996 Cen…
Secondary data analyses of dietary surveys undertaken in South Africa to determine usual food consumption of the population
Objective: The primary objective of this study was to generate a reference table of food items and average amounts of these items consumed by South Africans, for the Department of Health. The reference table was required to be representative of foods and beverages eaten frequently by children and adults from all age and ethnic groups in order for the Department of Health to test for contaminants in these foods. Design: The National Food Consumpti…
Evaluation of Body Shape, Eating Disorders and Weight Management Related Parameters in Black Female Students of Rural and Urban Origins
This study examined body shape dissatisfaction, eating disorder and weight management-related parameters as well as assimilation of Western cultural norms regarding body shape in black female students of urban and rural origins. Subjects (n=180; 20 ± 4,4 years old) were weighed, their height was measured and they completed the Body Shape Questionnaire, EAT-26, Eating Inventory (restraint scale), Adolescent Self-Concept Scale and a questionnaire c…
Evaluation of Body Shape, Eating Disorders and Weight Management Related Parameters in Black Female Students of Rural and Urban Origins
This study examined body shape dissatisfaction, eating disorder and weight management-related parameters as well as assimilation of Western cultural norms regarding body shape in black female students of urban and rural origins. Subjects (n=180; 20 ± 4,4 years old) were weighed, their height was measured and they completed the Body Shape Questionnaire, EAT-26, Eating Inventory (restraint scale), Adolescent Self-Concept Scale and a questionnaire c…
Evaluation of Body Shape, Eating Disorders and Weight Management Related Parameters in Black Female Students of Rural and Urban Origins
This study examined body shape dissatisfaction, eating disorder and weight management-related parameters as well as assimilation of Western cultural norms regarding body shape in black female students of urban and rural origins. Subjects (n=180; 20 ± 4,4 years old) were weighed, their height was measured and they completed the Body Shape Questionnaire, EAT-26, Eating Inventory (restraint scale), Adolescent Self-Concept Scale and a questionnaire c…
Secondary data analyses of dietary surveys undertaken in South Africa to determine usual food consumption of the population
Objective: The primary objective of this study was to generate a reference table of food items and average amounts of these items consumed by South Africans, for the Department of Health. The reference table was required to be representative of foods and beverages eaten frequently by children and adults from all age and ethnic groups in order for the Department of Health to test for contaminants in these foods. Design: The National Food Consumpti…
Development of a novel nutrition screening tool for use in elderly South Africans
Objective To develop a nutrition screening tool for use in older South Africans. Design A cross-sectional validation study in 283 free-living and institutionalised black South Africans (60+ years). Methods Trained fieldworkers administered a 24-hour recall and the Mini Nutritional Assessment (MNA) screening tool, and performed anthropometric measurements and physical function tests. Cognitive function was assessed using a validated version of the…
The National Food Consumption Survey (NFCS): South Africa, 1999
Objective The aim of the National Food Consumption Survey (NFCS) in South Africa was to determine the nutrient intakes and anthropometric status of children (1–9 years old), as well as factors that influence their dietary intake. Design This was a cross-sectional survey of a nationally representative sample of all children aged 1–9 years in South Africa. A nationally representative sample with provincial representation was selected using 1996 Cen…
Food variety and dietary diversity scores in children: Are they good indicators of dietary adequacy
Objective To assess whether a food variety score (FVS) and/or a dietary diversity score (DDS) are good indicators of nutrient adequacy of the diet of South African children. Methods Secondary data analyses were undertaken with nationally representative data of 1–8-year-old children (n = 2200) studied in the National Food Consumption Study in 1999. An average FVS (mean number of different food items consumed from all possible items eaten) and DDS …
National fortification of staple foods can make a significant contribution to micronutrient intake of South African adults
Background A national survey found that micronutrient deficiencies are prevalent in South African children, particularly calcium, iron, zinc, riboflavin, niacin, vitamin B6, folate, vitamin A, E and C. Mandatory fortification of maize meal and wheat flour were introduced in 2003 to combat some of the deficiencies found in children. To date however, there has not been a national survey on dietary intake in adults. Objectives The main objectives of…
Development and validation of a short questionnaire to assess sodium intake
Objectives To develop and validate a short food-frequency questionnaire to assess habitual dietary salt intake in South Africans and to allow classification of individuals according to intakes above or below the maximum recommended intake of 6 g salt day −1 . Design Cross-sectional validation study in 324 conveniently sampled men and women. Methods Repeated 24-hour urinary Na values and 24-hour dietary recalls were obtained on three occasions. Fo…
Development of a performance-rating scale for a nutrition knowledge test developed for adolescents
Objective The objectives of the present study were to (i) develop and validate a norm-referenced performance-rating scale to interpret a nutrition knowledge test developed for urban adolescents and (ii) develop a prototype for other researchers to follow when developing nutrition knowledge tests. Design For norm development the nutrition knowledge test (questionnaire) was administered to a sample representative of the questionnaire target group, …
A questionnaire for screening the micronutrient intake of economically active South African adults
Objective The aim of the present study was to develop (phase 1) and validate (phase 2) a screening questionnaire to assess the adequacy of micronutrient intake of economically active South African adults. Design For identification of indicator foods to be included in the screening questionnaire (phase 1), a comprehensive, eighty-six-item, quantified FFQ that reflected the food sources of thirteen selected micronutrients associated with the nutrit…
Overweight among children decreased, but obesity prevalence remained high among women in South Africa, 1999–2005
Objective The aim of the present study was to assess anthropometric status in South African children and women in 2005 in order to document temporal trends in selected anthropometric parameters. Design Heights and weights were measured in a cross-sectional study of children aged 1–9 years and women aged 16–35 years. The WHO reference values and BMI cut-off points were used to determine weight status. Setting South Africa, representative sample ba…
The HealthKick Study: Modifiable Lifestyle Factors in Primary Caregivers of Primary School Learners from Two School Districts in the Western Cape Province, South Africa
Caregivers of children in the HK study population presented with a large number of modifiable health risk behaviors. These results highlight the importance of engaging caregivers, as part of a whole school intervention, to promote healthy eating and physical activity
Provincial Dietary Intake Study (PDIS): Prevalence and Sociodemographic Determinants of the Double Burden of Malnutrition in A Representative Sample of 1 to Under 10-Year-Old Children from Two Urbaniz…
The objective of this study was to determine the prevalence and socio-demographic predictors of malnutrition in two urbanized economically active provinces (Gauteng N = 733, Western Cape N = 593) in South Africa. A multistage stratified cluster random sampling design was applied. Fieldworkers visited homes, measured children aged 1- +2 SD ≤ +3 SD] and 7.0% obese (BAZ > +3 SD). In 5- 1 (OR 2.39), while being in the third wealth quintile was protec…
Dietary Practices and Adolescent Obesity in Secondary School Learners at Disadvantaged Schools in South Africa: Urban–Rural and Gender Differences
South Africa has a high prevalence of obesity in black female adolescents and a paucity of knowledge regarding contributing dietary practices. The aim of this study was to assess the dietary practices and weight status of male and female adolescents at secondary schools in the Eastern Cape province in urban and rural areas. Sixteen schools and grade 8-12 learners (N = 1360) were randomly selected from three health districts comprising poor disadv…
Provincial Dietary Intake Study (PDIS): Micronutrient Intakes of Children in a Representative/Random Sample of 1- to <10-Year-Old Children in Two Economically Active and Urbanized Provinces in South A…
In 1999, the National Food Consumption Survey found serious risk of dietary deficiency for a number of micronutrients in 1- to 9-year-old children in South Africa. To address these shortfalls, fortification with vitamin A, thiamine, riboflavin, niacin, vitamin B6, folic acid, iron and zinc of maize meal and bread flour was made mandatory in 2003. The aim of this study was to examine micronutrient intakes of 1- to <10-year-old children after nearl…
Provincial Dietary Intake Study (PDIS): Energy and Macronutrient Intakes of Children in a Representative/Random Sample of 1–<10-Year-Old Children in Two Economically Active and Urbanized Provinces in …
In 1999, the National Food Consumption Survey found serious risk of dietary deficiency for a number of micronutrients in 1- to 9-year-old children in South Africa. To address these shortfalls, fortification with vitamin A, thiamine, riboflavin, niacin, vitamin B6, folic acid, iron and zinc of maize meal and bread flour was made mandatory in 2003. The aim of this study was to examine micronutrient intakes of 1- to <10-year-old children after nearl…
Has Food Security and Nutritional Status Improved in Children 1–<10 Years in Two Provinces of South Africa between 1999 (National Food Consumption Survey) and 2018 (Provincial Dietary Intake Study (PD…
The 1999 National Food Consumption Survey in South Africa showed that food insecurity (hunger) was prevalent in households with children aged one to <10 years. A repeat of the survey in two provinces: Gauteng (GTG) and the Western Cape (WC) was undertaken in 2018. Results showed that in all domains (living areas) in GTG, food shortage prevalence decreased between 1999 and 2018, from 55.0% to 29.6% in urban informal areas, from 34.1% to 19.4% in u…
The Nutrition Transition and the Double Burden of Malnutrition in Sub-Saharan African Countries: How Do These Countries Compare With the Recommended Lancet Commission Global Diet
SSA countries are in different stages of the nutrition transition. By superimposing clusters generated using macronutrient intake values on a map of the climatic regions in Africa, one can clearly see the importance of climate on the availability of food and food intake patterns. Climate change presents a great challenge to healthy eating, as the link between climate regions and diets is illustrated
Prevalence and socio-demographic predictors of malnutrition in under 5-year-olds in the Western Cape, South Africa
Nutrition policies and regulations promulgated in South Africa to address malnutrition in young children are implemented by the nine provincial governments. To facilitate malnutrition management at provincial level, robust provincial statistics for malnutrition and associated risk factors should be available. We set out to obtain this information for the Western Cape province. We surveyed 1214 under 5-year-olds, measured their weight and height/l…
Medicine (17 works) · Environmental health (14 works) · Obesity, Physical Activity, Diet (13 works) · Child Nutrition and Water Access (12 works) · Demography (9 works) · Demography (8 works) · Geography (7 works) · Malnutrition (7 works) · Obesity (7 works) · Population (7 works)