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  • Research note
  • Open Access

Mother’s Infant and Young Child Feeding (IYCF) knowledge improved timely initiation of complementary feeding of children aged 6–24 months in the rural population of northwest Ethiopia

  • 1,
  • 2,
  • 2 and
  • 2Email author
BMC Research Notes201811:593

  • Received: 1 March 2018
  • Accepted: 10 August 2018
  • Published:



Appropriate complementary feeding is vital to reduce young child morbidity and mortality. However, it continues as sub-optimal in Ethiopia, and literatures are also scarce. Therefore, this study aimed to determine timely initiation of complementary feeding and associated factors among mothers with children aged 6–24 months in the rural population of northwest Ethiopia. In the community based cross-sectional study, data on child feeding practices, individual and household characteristics were collected in Dabat Demographic Surveillance System site, Dabat District, northwest Ethiopia from 01 May to 29 June 2015. The bivariate and backward stepwise multivariable statistical methods were carried out to identify factors associated with timely initiation of complementary feeding.


About 53.8% [95% CI 45.9, 61.7] and 4.6% [95% CI 1.3, 7.9] of children were found with timely initiation of complementary feeding and had minimum dietary diversity, respectively. The odds of timely initiation of complementary feeding was higher among mothers with medium [AOR = 2.34, 95% CI 1.54, 3.81] and high [AOR = 2.10, 95% CI 1.41, 3.87] mother’s IYCF knowledge. In Dabat district, complementary feeding practice is lower. Thus, efforts should be strengthened to boost mother’s IYCF knowledge.


  • IYCF knowledge
  • Complementary feeding
  • Dietary diversity


Adequate nutrition is essential to ensure optimal health, physical and mental growth of children [1]. Complementary food, a transitional food is intended to meet the particular nutritional or physiologic needs of the young child. As a result, it is universally recommended that mothers should start nutritionally adequate and safe complementary food at the infant’s sixth month [2, 3]. Moreover, World Health Organization (WHO) supports the implementation of Infant and Young Child Feeding (IYCF) strategy for children aged 6–24 months as a critical element of efforts to address child malnutrition and mortality [2]. Hence, promotion of appropriate complementary feeding prevents 6% of child deaths in countries with high child mortality rate [4], it is of a paramount importance for developing countries, such as Africa and South-Central Asia [5]. A substantial number (2.1 million) of this mortality is contributed by undernutrition [6].

However, inappropriate complementary feeding practices have been widely documented, and stay as major public health problem in many developing countries [7]. Studies reports from Uganda [8], Ghana [9] and South Africa [10] revealed that more than half of mothers initiated complementary feeding away from sixth month. Various reports identified the determinants of timely initiation of complementary feeding practices, and it mainly related to the maternal health care utilization and socio-economic characteristics. Higher maternal educational status, unemployment [11], being married [12], having antenatal care (ANC) and home birthing [11, 12] are significantly associated with initiation of complementary feeding at the right time, sixth month. Furthermore, male sex of the child and smaller family size are related with increased odds of a timely initiation of complementary feeding [1214]. However, lower maternal socio-economic status is inversely associated with timely initiation of complementary feeding [15].

In Ethiopia child undernutrition continues as a critical public health problem [16] and it is an underlying cause for 53% of under five child mortality [17]. Complementary feeding practice is also by far suboptimal in the country, according to which 51% of children are given complementary food at 6–9 months of age, and only 4% of young children aged 6–23 months are found with minimum dietary diversity [16]. Conducting a study in an evidence dearth setting is critical to explore information on complementary feeding practices and its determinants especially; no study is conducted in the current study area. Even the previous studies are institution based [11, 13] and done in a smaller scale, districts level [12, 18], which ultimately affects the generalizability of the finding. Therefore to fill the knowledge gap, this study aimed to determine a timely initiation of complementary feeding and associated factors among children aged 6–24 months in HDSS site. The HDSS site is established to represent the rural northwest Ethiopia.

A community-based cross-sectional study was conducted in HDSS site from 01 May to 29 June 2015. The site is located in the Dabat District, northwest Ethiopia, and hosted by the University of Gondar. The district has an estimated population size of 145,458 living in 26 rural and four urban kebeles (the smallest administration unit Ethiopia). Currently, six health centers and 29 health posts are providing health services to the residents. The HDSS covers 13 randomly selected kebeles (three urban and ten rural kebeles) in different ecological zones (high land, middle land, and low land). A total of 67,385 inhabitants are living in these kebeles. The detailed data collection system, data quality control, the database, and the study setting of Dabat HDSS are described elsewhere [19].

The study is a part of the original survey which aimed to assess the nutritional status and feeding practice of children aged 6–59 months in Dabat HDSS. Of the total kebeles in the HDSS, eight kebeles were selected by using lottery method. All mothers with children aged 6–24 months and lived in the selected kebeles of the HDSS were included in the original survey. For households with multiple children, a child was selected randomly using lottery method. To estimate complementary feeding practice among mothers with children aged 6–24 months, sample size was calculated using Epi-info version 3.7 by considering the following assumptions; the prevalence of a timely initiation of complementary feeding in North Ethiopia was 62.8% [11], 95% level of confidence, 5% margin of error, 5% non-response rate, and a design effect of 1.5. Thus, a minimum sample size of 566 was obtained. However, 591 children fulfilling the inclusion criteria were found in the original survey, as a result to improve the power of the study, all the eligibles were included in the analysis.

A structured interviewer-administered questionnaire was used to collect data. The questionnaire composed of socio-demographic and economic characteristics, health care, and complementary feeding practice related variables. The questionnaire was first translated from English to Amharic, the native language of the study area, and was retranslated back to English by professional translators. Fourteen data collectors and three field supervisors were recruited for the study. Data collectors and supervisors were trained for 2 days. The tool was piloted out of the study area, thus the acceptability and applicability of the procedures and tools were evaluated. All filled questionnaires were daily checked for completeness by the supervisors and the investigators.

Complementary feeding practices were assessed according to the key indicators recommended by WHO and IYCF strategy of Ethiopia. The outcome variable, timely initiation to complementary feeding was defined as a proportion of children (6–24 months) who initiated complementary food at sixth month of age [20]. The standardized dietary diversity score tool was used to estimate feeding practice of children. To capture the usual dietary habit of children, both a single 24-h and 7 day recall methods were employed. Minimum dietary diversity was defined as proportion of children (6–24 months) who received complementary food made from four or more food groups in the previous 24-h [20]. Moreover, minimum meal frequency was determined as proportion of breastfed and non-breastfed children (6–24 months) who received solid, semi-solid or soft food for the minimum number of times or more in the 24-h preceding the survey [20].

Furthermore, the 7-day quasi food frequency, modified food group frequency was measured as the number of days the child consumed any of the seven food groups in the last 7 days preceding the date of survey. Since it shows usual dietary pattern of children, the 7-day quasi food frequency was used to overcome the limitation of 24 h recall method. A mother was asked to report for how many days her child ate any of the above seven food groups in the last 1 week. A score ranging from 1 to 7 was given depending on the number of days the child ate the listed food groups. Accordingly, if the child ate for 1–3 days it was coded as ‘1’, and 4 or more days coded as ‘2’, otherwise, the score ‘0’ was given if the child didn’t eat.

A Principal Component Analysis (PCA) was employed to estimate the mothers IYCF knowledge. Nine questions most of which are tailored from the core IYCF indicators were used to determine the mother’s knowledge. In the PCA, the knowledge item questions were summed and ranked into terciles; lowest, medium, and highest. Similarly, household wealth index was computed using a composite indicator for urban and rural residents by considering properties, like selected household assets and size of agricultural land, and PCA was performed to categorize the household wealth status into lowest, middle, and highest.

Data were entered into Epi-info version 3.5.3 and exported to Statistical Package for Social Sciences (SPSS) version 20 for analysis. Descriptive statistics, including frequencies and proportions were used to summarize variables. In order to indentify the factors associated with a timely initiation to complementary feeding, a binary logistic regression model was used. Co-linearity was checked for Household income and other independent variables like IYCF knowledge, antenatal care, and health care access and the result showed that the independent variables have no significant co-linearity. Variables with a p-values of < 0.2 in the bivariable analysis were subjected to multivariable analysis. We followed the method of Hailu et al. [21].

Main text

A total of 591 mother–child pairs were included for analysis. About two-thirds (66%) of children were in the age group of 12–24 months. More than half of mothers were housewives (59.7%) and had no formal education (70.2%). About 53.8% [95% CI 45.9, 61.7] of children were introduced to complementary feeding at their sixth month of age. Only 4.6% [95% CI 1.3, 7.9] of children consumed food composed of a minimum dietary diversity, while about 13.5% of children received the minimum meal frequency in the previous 24-h preceding the date of survey. Almost all of children didn’t eat other fruits and vegetables (98.8%), vitamin-A rich fruits and vegetables (95.9%) (Table 1). On the other hand, more than three-fourths (81.6%) and nearly two-thirds (60.2%) of children consumed starchy staples and legumes and nuts for 4–7 days per week, respectively (Fig. 1).
Table 1

Socio-demographic, health and dietary practice of mothers with children aged 6–24 months in the rural population of northwest Ethiopia, 2015



Percent (%)

Age of child (in months)







Age of mother (years)

 ≤ 35



 > 35



Marital status








 Orthodox Christians






Mothers education

 No formal education



 Primary education



 Secondary and above



Fathers education

 No formal education



 Primary education



 Secondary and above



Family size

 ≤ 4



 > 4



Mothers occupational status










Fathers occupational status










Possession of radio or television







Wealth status










Antenatal care visits

 No antenatal care visit



 1–3 visit



 ≥ 4 visit



Place of delivery




 Health institution



Delivery attendant

 Health professional






 Relative and volunteer



Postnatal visit







Health care access

 Good access (< 2 h)



 Poor access (> 2 h)



Mothers IYCF knowledge










Food groups


Starchy staples



Legumes and nuts



Dairy products



Flesh food (meat)






Vitamin-A rich fruits and vegetables



Other fruits and vegetables



aSingle, divorced and widowed

bMuslim, protestant and catholic

cStudents, unemployed, servant, own business

dContract and permanent work

eTraditional birth attendant

Fig. 1
Fig. 1

Number of days the children (6–24 months) consumed food groups in the last 7 days preceding the date of survey in the rural population of northwest Ethiopia, 2015

The result of the multivariable logistic regression analysis showed that mothers IYCF knowledge was significantly and independently associated with timely initiation to complementary feeding. Accordingly, the odds of timely initiation of complementary feeding were higher among mothers with medium [AOR = 2.34, 95% CI 1.54, 3.81] and high [AOR = 2.10, 95% CI 1.41, 3.87] IYCF knowledge compared to mothers with poor IYCF knowledge (Table 2).
Table 2

Factors associated with timely initiation of complementary feeding in the rural population of northwest Ethiopia, 2015


Timely initiation of complementary feeding

Crude odds ratio (95% CI)

Adjusted odds ratio (95% CI)

Yes (#)

No (#)

Initiation of breastfeeding

 Early initiation



1.08 (0.64, 1.8)


 Late initiation





Mothers IYCF knowledge









2.62 (1.74, 3.93)

2.34 (1.54, 3.81)*




2.06 (1.37, 3.10)

2.10 (1.41, 3.87)*

ANC visits









0.65 (0.41, 1.02)


 ≥ 4



0.82 (0.57, 1.18)


Health care access

 Good access



0.55 (0.38, 0.8)


 Poor access





Wealth status









1.54 (1.03, 2.30)





1.15 (0.78, 1.70)


Place of delivery






 Health institution



0.85 (0.59, 1.22)


Postnatal visit




1.02 (0.71, 1.43)







Mothers educational status

 No formal education





 Primary education



1.15 (0.71, 1.86)


 Secondary and above



1.30 (0.83, 2.04)


* Significant at p < 0.05

The prevalence of timely initiation of complementary feeding was 53.8%, and it was consistent with other study findings in Ethiopia (51–62.8%) [1113, 16] and India (55.1%) [22]. However, it was lower than reports of other developing countries, such as Nepal (70%) [23], Bangladesh (71%) [24], and Sir Lanka (84%) [25]. The observed discrepancy probably relates to difference in place of residence among the study participants and almost all of the mothers were rural inhabitants in this study. There has been lesser access to education, health care services, and other resources (printed and electronic medias) in the rural settlements [16]. These social inequalities lower the maternal literacy status and access to nutrition education and counseling. In fact improved literacy status and nutrition education are found to positively affect the complementary feeding practices [26, 27]. Furthermore, the discrepancy could be attributed to variation in the measurement of initiation of complementary feeding, in which the latter studies assessed initiation of complementary food at 6–8 months of age of the child while it was at sixth month for the former study. Thus, use of the reference period 6–8 months might over estimated the prevalence.

The odds of timely initiation of complementary feeding was higher among mothers with medium and higher IYCF knowledge. This finding was supported with another report in East Ethiopia [17]. The plausible explanation could be related to the role of knowledge to empower mother’s to resist external interferences and pressures from traditional faiths and misunderstandings favoring untimely initiation of complementary feeding. Improved health care access gives an added opportunity for mothers to get nutritional counseling thereby to practice the optimal IYCF [28]. The study finding could support to strengthen nutrition education through tailoring with behavioral change and communication components to address the community misconceptions towards IYCF practice.

The prevalence of minimum acceptable dietary diversity was very low (4.6%), and it was similar with what was reported from Amhara region, northwest Ethiopia (2%) [18]. However, the finding was lower than the reports from other developing countries, like India (15.2%) [29], Nepal (34%) [23], Bangladesh (41.9%) [24], and Sri Lanka (71%) [25]. This is probably related to lower economic status of the households in the study area, which impairs the households to purchase and offer diversified food to their child. Other studies also noted that, the households socio-economic status and per capita food expenditure was positively associated with dietary diversity [3032]. In addition, the lower dietary diversity could be due to the monotonous dietary habit of the community in this study area. In Ethiopia including the current study area, complementary food are made from cereals which is usually served with legumes or pulses [16]. In this study, the prevalence of timely initiation of complementary feeding and dietary diversity was low. Furthermore, mothers’ IYCF knowledge and health care access were significantly associated with timely initiation of complementary feeding. Thus, efforts should be strengthened to boost mothers’ IYCF knowledge.


As an illustration the cross sectional nature of the study limits measuring the cause and effect relationship between the potential factors and the outcome. Also there might be a recall and social desirability bias while subjects were requested to give dietary information.



Principal Component Analysis


World Health Organization


antenatal care


adjusted odds ratio


crude odds ratio


confidence interval


Infant and Young Child Feeding


dietary diversity score


standard deviation


Health and Demographic Surveillance System


Authors’ contributions

AT conceived the study, developed the tool, coordinated data collection, and carried out the statistical analysis and drafted the manuscript. GAB participated in the design of the study, developed the tool, and coordinated data collection. TD participated in the statistical analysis and drafted the manuscript. MMW participated in the design of the study and drafted the manuscript. All authors read and approved the final manuscript.


We would like to thank mothers for their willingness to participate in the study. Our appreciation will also go to the university of Gondar and Dabat DHSS site for their financial and material support, respectively.

Competing interests

The authors declare that they have no competing interests.

Availability of data and materials

Data will be available upon request from the correspondence authors.

Consent to publish

Not applicable.

Ethics approval and consent to participate

Ethical clearance was obtained from the Institutional Review Boards of the University of Gondar. An official permission letter was secured from the Dabat HDSS site. The study did not involve any invasive procedures and reporting of any response for intervention. So, the study posed a low or not more than a minimal risk to the study participants. Accordingly, all eligible mothers were informed about the purpose of the study, and interview was held only with those who agreed to give verbal consent to participate. The right of a participant to withdraw from the study at any time, without any precondition was disclosed unequivocally. Moreover, the confidentiality of information was guaranteed by using code numbers rather than personal identifiers and by keeping the questionnaire locked.


This study was funded by the University of Gondar. The views presented in the article are of the author and not necessarily express the views of the funding organization. University of Gondar was not involved in the design of the study, data collection, analysis and interpretation.

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Authors’ Affiliations

Department of Health Service Management and Health Economics, Institute of Public Health, College of Medicine and Health Sciences, University of Gondar, Gondar, Ethiopia
Department of Human Nutrition, Institute of Public Health, College of Medicine and Health Sciences, University of Gondar, 196, Gondar, Ethiopia


  1. Marriott BP, White A, Hadden L, Davies JC, Wallingford JC. World Health Organization (WHO) infant and young child feeding indicators: associations with growth measures in 14 low-income countries. Matern Child Nutr. 2012;8(3):354–70.View ArticlePubMedGoogle Scholar
  2. WHO, UNICEF. Global strategy for infant and young child feeding. Geneva: World Health Organization; 2003.Google Scholar
  3. WHO U, IFPRI U, Davis U. FANTA: indicators for assessing infant and young child feeding practices. Geneva: World Health Organization; 2008. Accessed 25 May 2011.
  4. Jones G, Steketee RW, Black RE, Bhutta ZA, Morris SS, Group BCSS. How many child deaths can we prevent this year? Lancet. 2003;362(9377):65–71.View ArticlePubMedGoogle Scholar
  5. Black RE, Victora CG, Walker SP, Bhutta ZA, Christian P, De Onis M, Ezzati M, Grantham-McGregor S, Katz J, Martorell R. Maternal and child undernutrition and overweight in low-income and middle-income countries. Lancet. 2013;382(9890):427–51.View ArticlePubMedGoogle Scholar
  6. Black RE, Allen LH, Bhutta ZA, Caulfield LE, De Onis M, Ezzati M, Mathers C, Rivera J, Maternal, Group CUS. Maternal and child undernutrition: global and regional exposures and health consequences. Lancet. 2008;371(9608):243–60.View ArticlePubMedGoogle Scholar
  7. Lutter CK, Daelmans BM, de Onis M, Kothari M, Ruel MT, Arimond M, Deitchler M, Dewey KG, Blössner M, Borghi E. Undernutrition, poor feeding practices, and low coverage of key nutrition interventions. Pediatrics. 2011. ArticleGoogle Scholar
  8. Mokori A. Nutritional status, complementary feeding practices and feasible strategies to promote nutrition in returnee children aged 6–23 months in northern Uganda. S Afr J Clin Nutr. 2012;25(4):173–9.View ArticleGoogle Scholar
  9. Solomon Sika-Bright. Ghana: Department of Sociology and Anthropology University of Cape Coast; 2010. Jan, Socio-cultural factors influencing infant feeding practicies of mothers attending welfare clinic in Cape Coast. Accessed 7 April 2014.
  10. Thairu LN, Pelto GH, Rollins NC, Bland RM, Ntshangase N. Socio-cultural influences on infant feeding decisions among HIV-infected women in rural Kwa-Zulu Natal, South Africa. Matern Child Nutr. 2005;1(1):2–10.View ArticlePubMedGoogle Scholar
  11. Shumey A, Demissie M, Berhane Y. Timely initiation of complementary feeding and associated factors among children aged 6 to 12 months in Northern Ethiopia: an institution-based cross-sectional study. BMC Public Health. 2013;13(1):1050.View ArticlePubMedPubMed CentralGoogle Scholar
  12. Yemane S, Awoke T, Gebreslassie M. Timely initiation of complementary feeding practice and associated factors among mothers of children aged from 6 to 24 months in Axum town, north Ethiopia. Int J Nutr Food Sci. 2014;3(5):438–42.View ArticleGoogle Scholar
  13. Semahegn A, Tesfaye G, Bogale A. Complementary feeding practice of mothers and associated factors in Hiwot Fana Specialized Hospital, Eastern Ethiopia. Pan Afr Med J. 2014;18:143.View ArticlePubMedPubMed CentralGoogle Scholar
  14. Basnet S, Sathian B, Malla K, Koirala DP. Reasons for early or late initiation of complementary feeding: a study in Pokhara. Am J Public Health Res. 2015;3(4A):69–75.Google Scholar
  15. Wijndaele K, Lakshman R, Landsbaugh JR, Ong KK, Ogilvie D. Determinants of early weaning and use of unmodified cow’s milk in infants: a systematic review. J Am Diet Assoc. 2009;109(12):2017–28.View ArticlePubMedGoogle Scholar
  16. Central Statistical Authority [Ethiopia] and ORC Macro. Ethiopia Demographic and Health Survey 2011. Addis Ababa: Central Statistical Agency; 2011. p. 2011.Google Scholar
  17. Federal Ministry of Health, Family Health Department Ethiopia. National strategy for infant and young child feeding. Addis Ababa: Federal Ministry of Health, Family Health Department Ethiopia; 2004.Google Scholar
  18. Nekatebeb H, Guyon A, Beyero M, Stoecker BJ. Factors related to exclusive breast feeding and dietary diversity of complementary foods: a case study in Amhara region of Ethiopia. FASEB J. 2010;24(734):733.Google Scholar
  19. Tariku A, Biks GA, Wassie MM, Gebeyehu A, Getie AA. Factors associated with prelacteal feeding in the rural population of northwest Ethiopia: a community cross-sectional study. Int Breastfeeding J. 2016;11(1):1.View ArticleGoogle Scholar
  20. World Health Organization. Indicators for assessing infant and young child feeding practices part 3: country profiles. Geneva: World Health Organization; 2010.Google Scholar
  21. Hailu S, Wubshet M, Woldie H, Tariku A. Iodine deficiency and associated factors among school children: a cross-sectional study in Ethiopia. Arch Public Health. 2016;74(1):46.View ArticlePubMedPubMed CentralGoogle Scholar
  22. Sinhababu A, Mukhopadhyay DK, Panja TK, Saren AB, Mandal NK, Biswas AB. Infant-and young child-feeding practices in Bankura district, West Bengal, India. J Health Popul Nutr. 2010;28:294–9.PubMedPubMed CentralGoogle Scholar
  23. Joshi N, Agho KE, Dibley MJ, Senarath U, Tiwari K. Determinants of inappropriate complementary feeding practices in young children in Nepal: secondary data analysis of Demographic and Health Survey 2006. Matern Child Nutr. 2012;8(s1):45–59.View ArticlePubMedGoogle Scholar
  24. Kabir I, Khanam M, Agho KE, Mihrshahi S, Dibley MJ, Roy SK. Determinants of inappropriate complementary feeding practices in infant and young children in Bangladesh: secondary data analysis of Demographic Health Survey 2007. Matern Child Nutr. 2012;8(s1):11–27.View ArticlePubMedGoogle Scholar
  25. Senarath U, Godakandage SS, Jayawickrama H, Siriwardena I, Dibley MJ. Determinants of inappropriate complementary feeding practices in young children in Sri Lanka: secondary data analysis of demographic and health survey 2006–2007. Matern Child Nutr. 2012;8(s1):60–77.View ArticlePubMedGoogle Scholar
  26. Hendricks K, Briefel R, Novak T, Ziegler P. Maternal and child characteristics associated with infant and toddler feeding practices. J Am Diet Assoc. 2006;106(1):135–48.View ArticleGoogle Scholar
  27. Sethi MV, Kashyap S, Seth V. Effect of nutrition education of mothers on infant feeding practices. Indian J Pediatr. 2003;70(6):463–6.View ArticlePubMedGoogle Scholar
  28. Egata G, Berhane Y, Worku A. Predictors of non-exclusive breastfeeding at 6 months among rural mothers in east Ethiopia: a community-based analytical cross-sectional study. Int Breastfeeding J. 2013;8(1):1.View ArticleGoogle Scholar
  29. Patel A, Pusdekar Y, Badhoniya N, Borkar J, Agho KE, Dibley MJ. Determinants of inappropriate complementary feeding practices in young children in India: secondary analysis of National Family Health Survey 2005–2006. Matern Child Nutr. 2012;8(s1):28–44.View ArticlePubMedGoogle Scholar
  30. Hatløy A, Hallund J, Diarra MM, Oshaug A. Food variety, socioeconomic status and nutritional status in urban and rural areas in Koutiala (Mali). Public Health Nutr. 2000;3(01):57–65.View ArticlePubMedGoogle Scholar
  31. Kennedy G, Ballard T, Dop MC. Guidelines for measuring household and individual dietary diversity. Rome: Food and Agriculture Organization of the United Nations; 2011.Google Scholar
  32. Thorne-Lyman AL, Valpiani N, Sun K, Semba RD, Klotz CL, Kraemer K, Akhter N, de Pee S, Moench-Pfanner R, Sari M. Household dietary diversity and food expenditures are closely linked in rural Bangladesh, increasing the risk of malnutrition due to the financial crisis. J Nutr. 2010;140(1):182S–8S.View ArticlePubMedGoogle Scholar


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