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What maternal factors influence the diet of 2-year-old children living in deprived areas? A cross-sectional survey

Published online by Cambridge University Press:  01 August 2009

Iain K Crombie*
Affiliation:
Department of Public Health, University of Dundee, Mackenzie Building, Kirsty Semple Way, Dundee DD2 4BF, UK
Kirsty Kiezebrink
Affiliation:
Department of Public Health, University of Dundee, Mackenzie Building, Kirsty Semple Way, Dundee DD2 4BF, UK
Linda Irvine
Affiliation:
Department of Public Health, University of Dundee, Mackenzie Building, Kirsty Semple Way, Dundee DD2 4BF, UK
Wendy L Wrieden
Affiliation:
Centre for Public Health Nutrition, Department of Medicine, University of Dundee, Dundee, UK
Vivien Swanson
Affiliation:
Department of Psychology, University of Stirling, Stirling, UK
Kevin Power
Affiliation:
Department of Clinical Psychology, NHS Tayside, Dundee, UK
Peter W Slane
Affiliation:
Erskine Practice, Arthurstone Medical Centre, Dundee, UK
*
*Corresponding author: Email i.k.crombie@chs.dundee.ac.uk
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Abstract

Objective

To investigate the maternal factors associated with poor diet among disadvantaged children.

Design

Survey of 300 mothers of 2-year-old children from areas of high deprivation in Scotland (response rate 81 %). A diet quality score was derived from reported consumption of carbohydrates, protein, fruit and vegetables, dairy products and restriction of sugary fatty foods.

Results

Most children (85 %) were classified as having a poor quality diet (low diet quality score). Mothers’ general knowledge about healthy eating was high, but did not predict the quality of the children’s diet. Lower frequencies of food preparation and serving, such as cooking with raw ingredients, providing breakfast daily and the family eating together, were also associated with a poorer diet. Regression modelling identified five significant factors. An increased risk of a poor diet was associated with mothers being unlikely to restrict sweets (OR = 21·63, 95 % CI 2·70, 173·30) or finding it difficult to provide 2–3 portions of fruit daily (OR = 2·94, 95 % CI 1·09, 7·95). Concern that the child did not eat enough increased the risk of a poor diet (OR = 2·37, 95 % CI 1·09, 5·16). Believing a healthy diet would help the child eat more reduced the risk of having a poor diet (OR = 0·28, 95 % CI 0·11, 0·74), as did providing breakfast daily (OR = 0·22, 95 % CI 0·05, 0·99).

Conclusions

Interventions to improve children’s diet could promote more positive intentions about preparing and serving of foods, particularly of specific meals at which the family eats together. The benefits of these behaviours to the child (improved diet, weight control) should be emphasised.

Type
Research Paper
Copyright
Copyright © The Authors 2008

Poor diet is associated with an increased risk of obesity, CHD and diabetes(Reference Mann1). The increasing prevalence of obesity and diabetes in children and adolescents is a major public health problem(Reference Goran, Ball and Cruz2). Current dietary problems include the regular consumption of snacks, sweets, soft drinks and fatty foods, and the low consumption of fruit and vegetables(Reference Bromley, Sproston and Sheldon3, Reference Gregory, Lowe, Bates, Prentice, Jackson, Smithers, Wenlock and Farron4). Socially disadvantaged groups are at particular risk of having a poor diet(Reference Inchley, Todd, Bryce and Currie5, Reference Ruxton, Kirk, Belton and Holmes6). Low income is an important factor for diet but it is not the only determinant of dietary behaviour. The recently published national survey on low income and diet(Reference Nelson, Erens, Bates, Church and Boshier7) showed that the most deprived 15 % of the population were less likely to consume wholemeal bread and vegetables and more likely to eat more processed meat, fat, spreads and oil and sugar.

Parents play a major role in determining dietary behaviour in children(Reference North and Emmett8, Reference Mrdjenovic and Levitsky9), with factors such as parental age, diet, education, occupation and health knowledge being important(Reference North and Emmett8, Reference Turrell, Hewitt, Patterson, Oldenburg and Gould10Reference Longbottom, Wrieden and Pine15). Other factors could include differences in purchasing patterns and the extent to which parents restrict their children’s consumption of sweet foods, soft drinks and snacks(Reference Hupkens, Knibbe, Van Otterloo and Drop16). A particularly interesting finding is that the variety of foodstuffs to which young children are exposed is an important determinant of subsequent diet. Children exposed to a limited range of foodstuffs may develop food neophobia, the dislike of new foods(Reference Falciglia, Couch, Gribble, Pabst and Frank17, Reference Koivisto and Sjödén18). The extent to which foodstuffs are presented in a positive or negative context also influences diet in children(Reference Birch19).

The design of interventions to improve diet in disadvantaged children will require a better understanding of the factors that influence eating behaviour. The present study investigates in detail the role of maternal factors in determining poor diet among disadvantaged 2-year-old children. It focused on 2-year-olds because mothers have considerable influence on what their children eat at this age and because this is the time when eating behaviour is being established(Reference Hursti12, Reference Savage, Fisher and Birch20).

Methods

The Tayside and Fife Committees on Medical Research Ethics approved the study (project reference 04/S1401115). The Scottish Index of Multiple Deprivation (SIMD)(21) was used to identify families living in areas of high deprivation. Ten general practices in Dundee and Fife situated in the two most deprived deciles were recruited. They identified a random sample of children aged 2 years with low SIMD scores. General practices were reimbursed for the time spent by practice staff identifying potential participants. To provide precise estimates of the proportions of women holding particular attitudes and beliefs, the sample size was calculated by specifying the desired size of the 95 % confidence intervals. To obtain a 95 % confidence interval of ±5 % required a sample of 300 women. A total 372 mothers had to be approached to yield the desired final sample.

Letters of invitation signed by a general practitioner were posted to the women together with a postcard to be returned if they did not wish to take part. Only three women opted out when first contacted by their general practitioner. Women who did not opt out were contacted by the researcher to discuss the study and to arrange an appointment for the interview. Eighteen women could not be contacted and forty-six refused to take part when contacted by the researcher. Five women were excluded after recruitment because they did not meet the entry criteria. In total 300 were successfully interviewed (response rate of 81 %).

Questionnaire data were collected from 9 November 2005 to 13 October 2006. The questionnaire was developed using: a social cognition approach, particularly the Theory of Planned Behaviour(Reference Ajzen22); previously used dietary questionnaires(Reference Parmenter and Wardle23Reference Shaw, McMunn and Field26); a literature review; and the findings from six focus groups conducted with mothers living in areas of high deprivation (details available from authors). Mothers were interviewed at home using a structured questionnaire displayed on a laptop computer. Each screen page contained only a few questions and most screens were illustrated with relevant computer graphics. The questionnaire was completed by the researcher but interviewees were shown the questions on the computer screen. For questions on food groups the graphics displayed the types of food within each group. As many of the questions had multiple choice answers, the use of screen displays gave interviewees the opportunity to view the question and possible answers while considering their responses. Most of the knowledge and belief questions used a 5-point Likert scale. Where appropriate the stem questions were derived from the Theory of Planned Behaviour. For example, on the subject of giving the child breakfast daily, some questions were ‘I plan to give breakfast every day…’ (options: strongly agree to strongly disagree); ‘Giving breakfast every day is…’ (options: very important to not at all important); ‘Other people think I should give breakfast every day…’ (options: strongly agree to strongly disagree).

Assessment of the children’s diet was based on national dietary recommendations. The Caroline Walker Trust recommends that a varied diet for under-fives should include food from the main four food groups every day(27). These are reinforced, and extended to include limits on high-fat/high-sugar foods, by Scottish nutritional guidance for early years(28) and the National Food Guide Balance of Good Health(Reference Gatenby, Hunt and Rayner29), recently updated as the Eatwell Plate(30). Children were allocated a dichotomous score based on whether or not they achieved a balance of the four major food groups and a limited amount of fatty and sugary foods. Children were classified as having a poor diet if they did not achieve all of the following:

  1. 1. Two or more portions of bread, other cereals or potatoes daily.

  2. 2. Two or more portions of fruit or vegetables daily.

  3. 3. One or more portions of dairy products daily.

  4. 4. One or more portions of meat, fish or alternatives daily.

  5. 5. No more than two high-fat or high-sugar snacks daily.

Modest criteria were set on the number of portions because there is evidence that few children attain the recommendations, particularly the guideline for fruit and vegetables(Reference Inchley, Todd, Bryce and Currie5).

Data were analysed using the SPSS for Windows statistical software package (SPSS Inc., Chicago, IL, USA). Logistic regression analysis was used to assess the relative importance of variables that predicted the quality of the diet eaten by the children. Variables were coded such that an increased odds ratio indicated an increased likelihood of a poor diet. Factors that were significant in univariate analysis were fitted into a model using forward selection (entry criterion P < 0·05) to identify factors that exerted statistically significant independent effects in determining the diet of the children.

Results

Three hundred mothers of children aged 2 years were interviewed. The age range of mothers was 18 to 34 years, with more than 70 % aged between 22 and 29 years (Table 1). Most lived in council housing (81 %), 43 % of mothers reported that no other adult lived in the home and (91 %) were not in employment. Only 22 % of children had ever been breast-fed and 60 % of mothers were smokers. Over 80 % of the children watched television for >4 h daily and only 22 % regularly played outdoors.

Table 1 Sociodemographic characteristics of participants: mothers (n 300) of 2-year-old children from areas of high deprivation in Scotland, November 2005–October 2006

The quality of the children’s diet was mixed. All children had dairy products daily and nearly all had a portion of a protein-rich food daily. However, most (91 %) ate processed meat two or more times weekly. Almost all children (95 %) had breakfast cereals at least five times weekly, although 43 % reported that this consisted of high-sugar breakfast cereals. Only 12 % of children met the recommended five portions of fruit and vegetables daily, with 47 % eating one or more portions of vegetables daily. Less than 1 % of children ate fish every week.

To explore predictors of the quality of the children’s diet a scoring system was developed. This was based on current dietary recommendations for the four main food groups(27) and the advice to restrict consumption of sugary fatty snacks (Table 2). Modest targets were set for the individual components. Many children achieved individual targets, but only forty-five children (15 %) achieved all five (Table 2).

Table 2 Components of dietary quality score developed to assess the diet of 2-year-old children (n 300) from areas of high deprivation in Scotland, November 2005–October 2006

*Number of children achieving.

†Includes breakfast cereals, rice and pasta.

‡In calculating this composite score all types of fruit and vegetables were included (i.e. frozen, fresh, etc.). Fruit juice could only contribute to a maximum of one portion daily. Pulses have not been included here as they have been included in the meat, poultry and alternatives calculation.

§All milk was included irrespective of fat content or type (i.e. cow’s, soya, goat’s, etc.).

||All types of meat and poultry were included whether processed on non-processed.

The level of mothers’ general knowledge about food recommendations and the benefits of a healthy diet was very high (Table 3). For example, 100 % knew they should eat more fruit, vegetables and complex carbohydrates and less fried foods and confectionery. They were also well informed about the links between diet (saturated fats, fruit and vegetables, sugar) and health outcomes. Almost all mothers believed a healthy diet was good for their child both in the short term (better for their teeth and improved behaviour) and the long term (grow up strong). None of these knowledge factors was significantly associated with the risk of a poor diet (low diet quality score).

Table 3 Knowledge of food recommendations and the benefits of healthy food: mothers (n 300) of 2-year-old children from areas of high deprivation in Scotland, November 2005–October 2006

*Number of mothers stating.

As well as questions on general dietary knowledge, mothers were asked about knowledge of specific dietary recommendations (Table 4). The risk of a poor diet was significantly increased if mothers thought the recommendations were that children should eat less than five pieces of fruit and vegetables (OR = 3·05, 95 % CI 1·35, 6·92) or eat more than two snacks daily (OR = 17·54, 95 % CI 2·31, 142·86). The children of mothers who were confident of their knowledge about healthy eating had a significantly reduced risk of a poor diet, whereas risk was increased if mothers thought advice on healthy eating was confusing. When presented with five common leaflets on nutrition for young children, 62 % of mothers claimed that they had not seen any of them before and this modestly increased the risk of a poor diet.

Table 4 Maternal factors which predict the quality of the child’s diet: mothers (n 300) of 2-year-old children from areas of high deprivation in Scotland, November 2005–October 2006

The mothers’ perception of the amount which the toddler ate was also important. Concerns about the child not eating enough and the belief that a healthy diet would make no difference to their weight significantly increased the risk of a poor diet (Table 4). Consistent with this, concern that the child sometimes ate too much reduced the risk of a poor diet.

Access to shops was not a problem, as all mothers did the majority of their shopping at a supermarket and three-quarters could buy fruit and vegetables of good quality. Only a few mothers reported that availability of cooking facilities (1 %) and storage space (9 %) were barriers to providing healthy meals. Most mothers reported that they could make typical family meals such as soup, mince and potatoes and spaghetti bolognaise, but less than half reported being able to make curry, fruit salad or pizza. Many fewer mothers actually made these foods; for example, 82 % could make soup but only 7 % did so. The children whose mothers did not make soup were at an increased risk of a poor diet (OR = 7·18, 95 % CI 2·90, 17·82). Reporting a busy lifestyle increased the risk of a poor diet (OR = 3·07, 95 % CI 1·34, 7·02). Children whose families had not eaten a meal together in the previous week had an increased risk of a poor diet (OR = 4·05, 95 % CI 1·55, 10·62). Children who had breakfast daily in the preceding week were much less likely to have a poor diet (OR = 0·21, 95 % CI 0·06, 0·70). Never offering previously rejected foods also increased the risk of a poor diet (OR = 7·22, 95 % CI 2·97, 17·55).

Mothers were asked about their views on the provision of three key food items (providing fruit and vegetables and limiting sweets). They were asked in turn how important it was to provide fruit and vegetables and to limit sweets, how easy it was to do it and how likely it was that they would do so. These items were powerful predictors of dietary quality. The most powerful were thinking it was unlikely that they would limit sweets (OR = 39·73, 95 % CI 5·39, 292·78) and thinking it was not important to limit sweets (OR = 31·81, 95 % CI 4·32, 234·50). Other important factors were stating that providing 2–3 portions of fruit daily was not easy (OR = 9·98, 95 % CI 4·03, 24·71) and reporting that they were not likely to provide 2–3 portions of fruit daily (OR = 7·08, 95 % CI 2·10, 23·79).

In multiple logistic regression analysis, five factors were found to exert statistically significant independent effects on the quality of young children’s diet (Table 5). These covered mothers’ perceptions of their control over the child’s diet (unlikely to limit sweets and providing fruit every day is not easy); concerns about what the child eats (that a healthy diet will help the child eat more and mothers’ concern that the child does not eat enough); and the serving of meals (providing breakfast daily). The final model showed a good fit to the data (Hosmer–Lemeshow goodness-of-fit test, χ 2 = 4·21, df = 7, P = 0·75).

Table 5 Final model of maternal factors influencing the quality of children’s diet: mothers (n 300) of 2-year-old children from areas of high deprivation in Scotland, November 2005–October 2006

Discussion

The study successfully conducted interviews with a high proportion of a sample of mothers living in socio-economically deprived areas. It supports previous research that many disadvantaged children have a poor diet(Reference Inchley, Todd, Bryce and Currie5, Reference Ruxton, Kirk, Belton and Holmes6, Reference Watt, Dykes and Sheiham31). It also shows the importance of mothers’ knowledge, beliefs and intentions in determining the diet of 2-year-old children living in areas of high deprivation. The most powerful predictor of poor diet quality was whether the mother intended to limit sweets, but regular mealtimes and concerns about how much the child eats were also important. As recently reported elsewhere(Reference Nelson, Erens, Bates, Church and Boshier7, Reference Macintyre32), we found that access to shops and availability of cooking facilities were not associated with diet quality (low diet quality score).

Exposure to a wide range of foodstuffs in early childhood encourages the child to have a varied diet later(Reference Birch19). It is suggested that a child needs to be given a new foodstuff over ten times before initial resistance is overcome(Reference Savage, Fisher and Birch20). Thus it is disappointing that in the present study almost half of mothers never offered previously rejected foods and this factor significantly increased the risk of a poor diet in the univariate analysis. Encouraging mothers to repeatedly try rejected foods would seem an essential component of any strategy to improve the diet of young children. Such an approach should also explain how children learn food preferences(Reference Stang33).

The results of the study suggest that guidance to improve the children’s diet should address the control which the mother exerts. This needs to be approached with care as there is strong evidence that restricting the amount of food results in overeating and overweight(Reference Clark, Goyder, Bissell, Blank and Peters34). For example, restricting children’s access to high-sugar foods can foster a preference for very sweet foods with increased consumption when not strictly supervised(Reference Liem, Mars and De Graaf35). One alternative, encouraging the child to eat healthy foods while offering a choice of eating, was associated with an increased consumption of fruit and vegetables(Reference Patrick, Nicklas, Hughes and Morales36). It is also thought that a child can associate foodstuffs with the context in which it is eaten(Reference Birch19). Thus parents could provide encouragement to eat healthy foods(Reference Faith, Scanlon, Birch, Francis and Sherry37) and praise for their consumption(Reference Vereecken, Keukelier and Maes38).

A separate issue is the planning and organisation of mealtimes. The present study found that half of the mothers seldom plan their children’s meals. This could result in an over-reliance on convenience foods, supplied on the demand of a hungry child. The study has also shown that several planning factors are significant in the univariate analysis and one, regular breakfast, was retained in the final model. Family mealtimes have been shown to be important for the quality of adolescents’ diet(Reference Cason39). Thus encouragement to plan regular meals, particularly when the family eat together, could form part of a strategy to improve diet.

The worry that the child does not eat enough is a challenge for improving the child’s diet. For most of human history parents have been concerned with ensuring the child had enough to eat, a view that may persist(Reference Savage, Fisher and Birch20). This concern could lead the mothers to supply any type of food, however healthy or unhealthy, to ensure the child is not undernourished. Furthermore, only a few mothers were concerned about feeding their child too much. To overcome this, increased emphasis in health education should be given to the problem of overnutrition.

Mothers had high levels of general knowledge about healthy eating. This knowledge did not predict the quality of the children’s diet score in the present study. This does not mean that dietary knowledge is not important. Because most mothers had very high scores on knowledge, these factors cannot act as predictors in a statistical model. However, it suggests that providing additional information is unlikely to improve the children’s diet. In contrast to general dietary knowledge, awareness of specific dietary recommendations was lower and was significantly associated with poorer diet. Many mothers felt confused about expert recommendations. The challenge for health education is to deliver accurate and consistent information in a way that mothers will use.

The present study has some limitations. It is a relatively small cross-sectional study of reported food behaviours among socio-economically disadvantaged mothers. The large confidence intervals on some of the odds ratios indicate the limited precision of several estimates. This reflects the small size of the study. However, the study was powerful enough to detect many significant associations in the univariate analyses, and the final regression model identified five factors which exerted independent statistically significant effects. An alternative approach to the study design would have been to compare socio-economically disadvantaged mothers with those from affluent areas. However, we were concerned that differences in income might obscure the ways in which attitudes and beliefs influence behaviour. Our approach was to keep income constant and to contrast the attitudes and beliefs of mothers whose children had a poor diet with those whose children had a good diet. This identified the behavioural factors which could be acted on to improve diet. Such actions could complement government-level initiatives to increase the incomes of disadvantaged mothers.

In summary, the present study has highlighted several facets of mothers’ beliefs, attitudes and behaviour which could be targeted in interventions designed help mothers improve their child’s diet (Box 1). Interventions are required to promote more positive intentions to the preparation and serving of foods. The benefits of these behaviours to the child (improved diet, weight control) should be emphasised. Mothers could be encouraged to plan specific meals at which the family eats together.

Box 1 Types of interventions to improve children’s diet

Address knowledge gaps and misperceptions:

  1. 1. Emphasise the need to restrict high-fat/high-sugar foods.

  2. 2. Promote fish consumption.

  3. 3. Discourage consumption of processed meats.

  4. 4. Utilise media other than leaflets, such as television and radio.

Healthy weight:

  1. 1. Address over-consumption in health education.

  2. 2. Emphasise that a healthy diet will help control weight.

Expand the range of foods eaten in the household:

  1. 1. Provide mothers with free fresh fruit in nurseries and child centres.

  2. 2. Expand the range of foods covered by the healthy start voucher scheme.

  3. 3. Institute a national try-a-new-food campaign.

  4. 4. Encourage local radio and press to broadcast recipes for simple meals.

  5. 5. Coordinate education campaigns with supermarket special offer deals.

Food purchasing:

  1. 1. Promote planned purchasing so that simple meals can be made quickly.

  2. 2. Promote healthy alternatives to high-sugar/high-fat snacks.

Food preparation and serving:

  1. 1. Clarify that healthy foods can be easily prepared.

  2. 2. Emphasise that healthy options are often cheaper.

  3. 3. Encourage the provision of breakfast daily.

Planning, control and self-efficacy:

  1. 1. Convince mothers that planning meals is important.

  2. 2. Encourage mothers to plan to provide a meal at a set time on a chosen day.

  3. 3. Reinforce the social benefits of eating together.

  4. 4. Persuade mothers to develop explicit strategies to help the child to eat rejected foods.

  5. 5. Persuade mothers to develop explicit strategies to reduce the consumption of high-fat/high-sugar snacks.

Acknowledgements

Sources of funding: The study was supported by a grant from the Chief Scientist Office, The Scottish Executive Health Department (grant number CZH/4/205).

Competing interests: None of the authors have any competing interests.

Authors’ contributions: I.K.C. – study design, supervision, analysis, interpretation of results, writing the report. K.K. – questionnaire design, interviewing participants, analysis, interpretation of results, editing the report. L.I. – study design, analysis, interpretation of results, writing the report. W.L.W. – study design, analysis, interpretation of results, editing the report. V.S. – study design, analysis, interpretation of results, writing the report. K.P. – study design, interpretation of results, editing the report. P.W.S. – study design, editing the report.

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Figure 0

Table 1 Sociodemographic characteristics of participants: mothers (n 300) of 2-year-old children from areas of high deprivation in Scotland, November 2005–October 2006

Figure 1

Table 2 Components of dietary quality score developed to assess the diet of 2-year-old children (n 300) from areas of high deprivation in Scotland, November 2005–October 2006

Figure 2

Table 3 Knowledge of food recommendations and the benefits of healthy food: mothers (n 300) of 2-year-old children from areas of high deprivation in Scotland, November 2005–October 2006

Figure 3

Table 4 Maternal factors which predict the quality of the child’s diet: mothers (n 300) of 2-year-old children from areas of high deprivation in Scotland, November 2005–October 2006

Figure 4

Table 5 Final model of maternal factors influencing the quality of children’s diet: mothers (n 300) of 2-year-old children from areas of high deprivation in Scotland, November 2005–October 2006