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Determinants of infant and young complementary feeding practices among children 6–23 months of age in urban Pakistan: a multicenter longitudinal study

BMC Nutrition volume 6, Article number: 75 (2020) Cite this article

Abstract

Background

Suboptimal feeding practices have a negative impact on children’s health and growth in the first 2 years of life and increase their risk of undernutrition, morbidity, and mortality. The aim of the study was to assess the factors that influence infant and young child feeding practices among urban mothers in a hospital setting at Karachi, Pakistan.

Methods

A longitudinal multi-center cohort study was conducted in four countries, MULTICENTER BODY COMPOSITION REFERENCE STUDY (MBCRS) to produce normal body composition reference data in healthy infants from 3 months to 24 months of age. Repeated anthropometric (weight, length and head circumference) and body composition measurements using “deuterium dilution method” along with 24-h dietary recall questionnaires were performed on 250 healthy term infants at 3, 6, 9, 12, 18, and 24 months of age. The 24-h dietary recall data from this study was used to assess the breastfeeding and complementary feeding practices in children aged 6–24 months.

Results

A total of 250 healthy infants were enrolled in the study. A majority of newborns (75.4%) were exclusively breastfed till 3 months of age; however, by 6 months of age, only 30.2% of infants were exclusively breastfed. Only 44.1% of children aged 6–24 months achieved minimum dietary diversity (MDD), 84.7% achieved minimum meal frequency (MMF), and 44.1% achieved a minimum acceptable diet (MAD). 71.4% achieved MDD and MAD and 100% achieved MMF at 24 months. The bivariate analysis found that breastfed children (OR 3.93, 95% CI 2.72–5.68), with employed mothers (OR 1.55, 95% CI 1.06–2.27) who had graduated from secondary school (OR 1.45, 95% CI 1.08–1.94) were more likely to meet minimum dietary diversity. The multivariable analysis showed that only the child’s age was significantly associated with MDD (p value< 0.0001), with the likelihood of meeting MDD increasing as the children aged; 9 months (OR 18.96, 95% CI 6.63–54.19), 12 months (OR 40.25, 95% CI 14.14–114.58), 18 months (OR 90.02, 95% CI 30.84–262.77) and 24 months (OR 82.14, 95% CI 27.23–247.83).

Conclusion

Our study revealed that Infant and young child feeding practices are significantly associated with maternal education, employment, and the child’s age. Therefore, it is essential that investments be made towards protective breastfeeding and complementary feeding policies and legislations, emphasis on female education and ensuring the availability of affordable nutritious and diverse foods.

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Strength and limitations

We were able to study determinants of IYCF practices in an urban population.

Majority of our respondent mothers willingly participated in the study.

We used 7 food groups, recommended by the WHO to measure dietary diversity.

Data on feeding practices was collected on the 24-h recall only and consumption precision may not have been absolute.

Introduction

Recent global estimates have shown a slight decline in the prevalence of child stunting (21.3%) and wasting (6.9%); however, undernutrition remains an alarming concern as the decline has been slow and continues to impact the lives of millions of children under 5 years [1] . According to regional estimates, South Asia was revealed to have one of the highest burdens of undernutrition (31.7% stunted; 14.3% wasted) [1]. While among South Asian countries, Pakistan is ranked as having the highest prevalence of stunting (40.2%), wasting (17.7%) and underweight (28.9%) [2,3,4,5,6,7,8]. Inadequate breastfeeding and suboptimal complementary feeding practices are consistent predictors of malnutrition in the first 2 years of life [9]. This period has been recognized as the ‘critical window of opportunity’ for the promotion of optimal growth, health and development of a child [10]. Children may become malnourished if they are not exclusively breastfed during the first 6 months of life, and do not receive sufficient quantities of nutritionally adequate complementary foods after 6 months of age with continued breastfeeding till 2 years of age [11].

In Pakistan, exclusive breastfeeding (48.4%), complementary feeding practices, such minimum dietary diversity (MDD) (14.2%), minimum meal frequency (MMF) (18.2%) and minimum acceptable diet (MAD) (3.6%), and continued breastfeeding till 2 years (56.5%) are far below acceptable levels [7]. Lack of dietary diversity among children is a significant problem across the country, where diets predominantly consist of starchy staples with limited flesh foods, seasonal fruits and vegetables [12, 13]. Inadequate breastfeeding and complementary feeding practices, also referred to as infant and young child feeding (IYCF) practices, leave children vulnerable to malnutrition in the first 2 years of life [14]. “Majority of the studies” conducted in Pakistan primarily focus on identifying determinants of IYCF practices in rural communities, where community health workers provide monthly social and behavioural change communication messages related to maternal nutrition, IYCF practices, health and hygiene. To address the gap in evidence among urban communities, data from the Multicenter Body Composition Reference Study (MBCRS) was used to conduct a secondary analysis of IYCF practices among children 6–23 months [15]. The current study assessed the factors that influence IYCF practices among urban mothers in a hospital setting at the Aga Khan University Hospital, Karachi, Sindh, Pakistan.

Methodology

Study design and setting

This was a nested cross-sectional study within the large parent study of MBCRS, carried out at the Aga Khan University Hospital a tertiary care center with multiple outreach hospitals, providing a wide range of clinical services across Pakistan. The study was carried out in collaboration with the International Atomic Energy Agency (IAEA) from October 2014 to November 2017. The objective of the MBCRSstudy was to produce normal body composition reference data in healthy infants from 3 months to 24 months of age. Repeated anthropometric (weight, length and head circumference) and body composition (deuterium dilution method) measurements along with 24-h dietary recall questionnaires were performed on 250 healthy term infants at 3, 6, 9, 12, 18, and 24 months of age. The 24-h dietary recall data from this study was used to assess the breastfeeding and complementary feeding practices in children aged 6–24 months. The mothers were also provided with routine SBCC messages related to maternal nutrition, IYCF practices, health and hygiene practices during their monthly post-natal follow-up visits tothe hospital .

Sample size

The Sample size was calculated on the basis of the primary outcome. The proposed study centres have a power of 90% to detect fat mass and far free mass for boys and girls less than one standard deviation away from a reference study [16]; United States; mean FM 3.10 ± 0.5 kg and 3.05 ± 0.46 kg for boys and girls respectively; and mean FFM 9.13 ± 1.06 kg and 8.99 ± 1.1 kg for boys and girls respectively). Sites (n = 4) and study population (n = minimum 400) within 2 years. Pakistan (n = 150), Brazil (n = 150), South Africa (n = 150), Australia (n = 150).

Study participants and eligibility criteria

Pregnant mothers at least 18 years or above, who had given birth between 37 weeks (early term) to 41 weeks (late term) of gestation, intended to exclusively breastfeed for the first 6 months and preferably continue for at least 12 months, attained at least a secondary level education, and were non-smokers with no significant morbidity, were invited to participate in the study. The mother and infant dyads were enrolled from the labour and delivery ward between October 2014 – October 2015 and followed up till November 2017 for main study MBCRS. Written consent was obtained from mothers prior to enrolment in the study.

Data collection

A structured questionnaire was administered to collect information from mothers on demographic characteristics, reproductive history, gestational age, infant’s dietary intake and anthropometry by trained interviewers. A multi-pass 24-h dietary recall was used to obtain in-depth data on the type and quantity of all beverages and foods consumed by the infant during the past 24 h [17]. The multi-pass approach has been validated in many countries and has been found to increase the interviewer’s ability to collect substantial details on each beverage or food, along with its preparation method and the portion sizes consumed [17]. Data collected from the 24-h recall was used to assess the Minimum dietary diversity (MDD), minimum acceptable diet (MAD) andMinimum meal frequency (MMF), while the repeated recalls led to the identification of a usual intake among infants living in urban areas.

The study data collection team consisted of a team supervisor and five data collectors. Due to local cultural restrictions, a female medical officer and female nurses were hired as the team supervisor and data collectors. The data collection team received 5 days of training on the study methods, questionnaires, anthropometric measurements, deuterium dilution techniques, and ethical issues. This was followed by 2 days training on data collection form for Food recall and food frequency and standardization training on anthropometry using the INTERGROWTH-21stInternational Fetal and Newborn Growth Standards for the twenty-first Century, The International Fetal and Newborn Growth Consortium, INTERGROWTH-21st Anthropometry Manual, University of Oxford. The study questionnaire was pre-tested, and changes incorporated prior to data collection. For quality assurance, the team supervisor and study manager randomly reassessed and validated the data collected from 5% of mother and infants. The Emergency Nutrition Assessment software was used to conduct automated plausibility and data quality checks for the anthropometric data.

Statistical analysis

Descriptive statistics related to socioeconomic status, education, and health were presented as mean ± standard deviation (SD), frequencies and percentages. Furthermore, a chi square test was used to determine an association between variables. Logistic regression was used to assess the relationship between IYCF practices with other variables. World Health Organization (WHO) standard indicators for assessing IYCF practices were used to determine adequate meal frequency, diversity and acceptability [13]. To assess the minimum dietary diversity, dietary recall data was classified using the seven WHO food groups (Table 1). Odds ratios (OR) were reported with 95% confidence intervals (CI). Significance has been defined as P value < 0.05. Data were double entered in the Visual FoxPro database by trained data input operators. All analyses was performed in SPSS version 15.

Table 1 Classification of foods consumed by children according to WHO’s seven food groups
Full size table

Results

Characteristics of study population

A total of 250 pregnant mother and newborn dyads were enrolled in the study and followed up till the infant’s second birthday. About half (53.2%) of the enrolled mothers and infants completed the study in the main study. A total of 117 mothers were lost to follow up due to multiple reasons including migration, unavailable etc. Among the enrolled children, 118 (47.2%) were males and 132 (52.8%) were females (Table 2). The average birthweight was 3.11 (± 0.37) kg and the length and head circumference were 49.05 (± 1.67) cm and 33.91 (± 1.05) cm, respectively. The mean age of the mothers was 28.48 (±4.4) years. Majority of the mothers (80.4%) were housewives, with an average 14.39 ± 2.53 years of education. Approximately, 105 (42.0%) were first-time mothers, 81 (32.4%) were second-time mothers and 64 (25.6%) already had two or more children. A similar proportion of families was observed across the average monthly household’s income categories; 38.8% had an income between 50,000–75,000 PKR, 29.2% had an income between 75,000–100, 000 and 32.0% has an income > 100,000PKR.

Table 2 Characteristics of study infants and their mothers (N = 250)
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Breastfeeding and complementary feeding practices

A majority of newborns (75.4%) were exclusively breastfed till 3 months of age; however, by 6 months of age, only 30.2% of infants were exclusively breastfed (Table 3). Solid, semi-solid and soft foods were introduced to infants, on average, by 5.44 ± 0.56 months, with 60.4% of infants being introduced to these foods at 6 months of age. Age appropriate breastfeeding was found to be 81.1% among children 0–23 months of age.

Table 3 Breastfeeding and complementary feeding practices pattern of the study infants
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A total of 88.3% of infants continued to be breastfed at 12 months of age, while at 2 years of age 32.2% of infants continued to be breastfed. Only 44.1% of children aged 6–23 months achieved minimum dietary diversity (MDD), 84.7% achieved minimum meal frequency (MMF), and 44.1% achieved a minimum acceptable diet (MAD). Children were found to increasingly achieve the three complementary feeding indicators as they aged, with 71.4% achieving MDD and MAD and 100% achieving MMF at 24 months of age (Fig. 1).

Fig. 1
figure 1

Overall percentage of children with minimum dietary diversity, meal frequency and acceptable diets calculated at 6, 9, 12, 18, and 24 months of age

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Children 6–23 months were found to have consumed foods on average from 2.56 (± 1.99) food groups of the seven WHO food groups. At 6 months of age, children primarily consumed grains, roots and tubers (46.5%) and other fruits and vegetables (18.9%), followed by vitamin A rich fruits and vegetables (7.5%), dairy products (4.4%), eggs (3.8%), legumes and nuts (3.8%) and flesh foods (1.3%) (Fig. 2). From 9 to 12 months of age, children were found to mainly consume grains, roots and tubers (100%) and other fruits and vegetables (~ 60%), with a substantial increase in consumption of flesh foods and legumes and nuts. However, from 18 to 24 months of age, these children consumed predominately grains, roots and tubers, flesh foods and dairy products.

Fig. 2
figure 2

Frequency of consumption of various food groups in %, according to WHO recommendations, across different age groups of study participants

Full size image

The consumption trends from these food groups indicate that as the children aged, they were provided with a more diverse diet. The consumption trends were similar among the food groups, with the exception of other fruits and vegetables. Once stratified by breastfeeding practices (breastfed; non-breastfed), older children were found to consume a more diverse diet as compared to younger children (Fig. 3).

Fig. 3
figure 3

Patterns in dietary diversity among breastfed and non-breastfed children, assessed at 6, 9, 12, 18 and 24 months of age

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Factors associated with minimum dietary diversity among children aged 6–23 months

The odds ratio (OR) and 95% CI for factors associated with MDD in the univariate and multivariable models are presented in Table 4. The univariate analysis showed that breastfed children (OR 3.93, 95% CI 2.72–5.68), with employed mothers (OR 1.55, 95% CI 1.06–2.27) who had graduated from secondary school (OR 1.45, 95% CI 1.08–1.94) were more likely to meet minimum dietary diversity. Children at 9 months (OR 18.64, 95% CI 6.52–53.13), 12 months (OR 39.77, 95% CI 14.03–112.69), 18 months (OR 94.51, 95% CI 32.84–271.98) and 24 months (OR 96.87, 95% CI 33.51–280.02) when compared to children at 6 months (reference group) were more likely to meet MDD. There was no association between the child’s gender, maternal age, birth order, household income and the likelihood of a child meeting MDD. The multivariable analysis examined the likelihood of breastfeeding practices, child’s age, maternal education, employment, and household income influencing the child’s ability to meet MDD. The multivariable analysis shows that only the child’s age was significantly associated with MDD (p value< 0.0001), with the likelihood of meeting MDD increasing as the children aged; 9 months (OR 18.96, 95% CI 6.63–54.19), 12 months (OR 40.25, 95% CI 14.14–114.58), 18 months (OR 90.02, 95% CI 30.84–262.77) and 24 months (OR 82.14, 95% CI 27.23–247.83).

Table 4 Factors associated with minimum dietary diversity among children aged 6–23 months
Full size table

Discussion

Globally, malnutrition is estimated to be the underlying cause of 45% of all deaths in children under the age of 5 years [18]. The first 2 years of life are crucial as during this period, the body lays the foundation for future growth and development of a child. Any nutritional deficiencies during this time can be manifested in the form of impaired cognitive development, compromised educational achievement and ultimately low economic productivity later in life [19]. The Lancet Maternal and Child Undernutrition series, along with a growing body of evidence, has identified the need to focus on the first 1000 days window of opportunity and the consumption of a diverse diet, including an adequate number of food items and food groups to prevent malnutrition among children [18, 20,21,22,23,24,25]. Irrespective of this guidance, the consumption of a diverse diet (44.1%) and an adequate number of food groups (84.7%) was found to be low in our study population. This was similar to other developing countries in the region, such as Afghanistan (MDD 22%, MMF 51%), Bangladesh (MDD 27%, MMF 64%), India (MDD 20%, MMF 36%) and Nepal (MDD 45%, MMF 71%) [26,27,28,29,30,31,32]. Complementary foods primarily consumed by infants and young children were found to be grains, tubers and roots with limited intake of flesh foods and fruits and vegetables – resembling the dietary patterns in other South Asian countries [33]. A meta-analysis of IYCF practices and child growth outcomes from eight countries in South Asia found that poor diets among children 6–23 months were a primary factor of child stunting [33]. Additionally, children whose diets did not meet the MDD were more likely to be wasted, while children who did not meet MMF were more likely to be severely wasted [34]. Hence, affirming the urgency of public health professionals to emphasis the need to improve complementary feeding practices in Pakistan [35, 36].

Our study found a gradual increase in the likelihood of children meeting the MDD at 9 months, 12 months, 18 months, and 24 months as compared to children at 6 months (reference group). Children aged 9–24 months were twenty times more likely to meet MDD as compared to their younger selves at 6 months of age. A similar association between dietary diversity and the child’s age were observed by Aguayo et al. in four studies exploring the determinants of IYCF practices from countries within the region [27, 36,37,38]. Furthermore, these studies identified that IYCF practices were more likely to be suboptimal among first-born children, children with younger mothers, children whose mothers were less educated and unemployed and children living in poorer households. These findings are similar to our univariate analysis, which identified that mothers with higher levels of education and employment were more likely to feed their children a diversified diet. However, unlike Aguayo et al., our multivariable analysis found no significant association between maternal education and employment status on MDD in children 6–23 months. Other factors such as maternal age, birth order, gender and household income also had no significant association on dietary diversity in our study population. Recent studies have found that higher total household expenditures and wealth quintile are a prerequisite of a household’s ability to acquire nutritious foods and achieve dietary diversity [39, 40]. This may indicate that affordability of nutritious and diverse foods may not have been a barrier for our study population.

Strengths and limitations

A key strength of our study is the low rate of loss to follow-up, which improves the internal validity of the study estimates. Our analysis is limited by the longitudinal cohort nature of our data, which does not permit the assessment of causality. The 24-h recall method used to collect dietary diversity data was a challenging task as some mothers may have had difficulty in recollected the exact details of food consumption due to forgetfulness. Subjects with any missing data were excluded from all models. Despite these limitations, our study identified determinants of IYCF practices among urban mothers.

Conclusion

Our study revealed that Infant and young child feeding practices are significantly associated with maternal education employment, and the child’s age. Therefore, it is essential that investments be made towards protective breastfeeding and complementary feeding policies and legislations, female education and ensuring the availability of affordable nutritious and diverse foods.

Availability of data and materials

The datasets used for the article and the study is available from the corresponding author on request.

Abbreviations

MBRCS:

Multi-Country Body Composition Reference Study

IYCF:

Infant and young child nutrition

DDS:

Dietary diversity score

IAEA:

International Atomic Energy Agency

MDD:

Minimum dietary diversity

MAD:

Minimum acceptable diet

MMF:

Minimum meal frequency

WHO:

World Health Organization

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Acknowledgements

We would like to acknowledge the study participants who have contributed to the study. We are thankful for the funding support from IAEA.

Funding

This study was funded by International Atomic Energy Agency, Vienna, Austria.

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Author notes

  1. Shabina Ariff, Javairia Khalid and Laila Sikanderali contributed equally to this work.

Authors and Affiliations

  1. Department of Paediatrics and Child Health, Aga Khan University, Karachi, Pakistan

    Shabina Ariff, Kamran Saddiq, Javairia Khalid, Laila Sikanderali, Batha Tariq, Fariha Shaheen, Gul Nawaz, Atif Habib & Sajid Bashir Soofi

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  1. Shabina Ariff
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Contributions

SA and SBS contributed to the conception and design of the study and reviewed final version of the manuscript. LS contributed in the implementation of the study. SA, LS and JK drafted the manuscript. FS contributed in analysis of data. While SBS, KS, BT, GN and AH critically reviewed the manuscript. All authors have read and approved the final manuscript.

Corresponding author

Correspondence to Sajid Bashir Soofi.

Ethics declarations

Ethics approval and consent to participate

Ethical approval was granted by the Ethics Review Committee of Aga Khan University prior to commencement of the study. All parents provided written consent to enrol their infants in the study.

Consent for publication

Not applicable.

Competing interests

The authors declare that they have no competing interests.

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Ariff, S., Saddiq, K., Khalid, J. et al. Determinants of infant and young complementary feeding practices among children 6–23 months of age in urban Pakistan: a multicenter longitudinal study. BMC Nutr 6, 75 (2020). https://doi.org/10.1186/s40795-020-00401-3

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BMC Nutrition

ISSN: 2055-0928

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