Research Article - Journal of Food Science and Nutrition (2018) Volume 1, Issue 1
Socio-demographic and nutritional determinants of birth weight.Shafiqul Islam Khan1*, Diruba Easmin Jhorna2, Atul Chakma2, Abu Tareq1, Musammet Rasheda Begum3
- *Corresponding Author:
- Md Shafiqul Islam Khan
Department of Food Microbiology
Patuakhali Science and Technology University
E-mail: [email protected]
Accepted date: February 21, 2018
Citation: Khan SI, Jhorna DE, Chakma A, et al. Socio-demographic and nutritional determinants of birth weight. J Food Sci Nutr. 2018;1(1):29-32.
Global high prevalence of low birth weight (LBW) is a major public health concern leads to high neonatal and infant deaths. This study was conducted to find out the prevalence of low birth weight and to effect of associated socio-demographic and nutritional predictors. A total of 200 respondents were approached from January 2016 to June 2016. Data were collected on sociodemographic and nutritional factors by interviewing pregnant mothers. Hemoglobin level and blood pressure data were recorded from mothers’ antenatal care card. Descriptive data revealed that the prevalence of low birth weight was 17%. Correlation matrix showed age and hemoglobin concentration significantly associated with birth outcome. Regression analysis portrayed that one unit increased age and hemoglobin corresponds to the respectively 0.017 and 0.050 unit increased birth weight of the child. To be concluding, teenage mothers and low hemoglobin level were the important risk factors for low birth weight in the study area.
Low birth weight, Factors, Nutritional determinants
Low birth weight (LBW) is a major determinant of morbidity, mortality and disability in infancy and childhood . It is associated with the age of the mothers [2,3] marital age and parity [4-7] maternal education  family income, poverty and employment status Hemoglobin (Hb) and blood pressure (BP) also affected the LBW [3,9]. Maternal hypertension increased intrauterine growth restriction and LBW [3,10,11]. Prevalence of LBW is quite high in developing countries. In Bangladesh, there is a high prevalence of low birth weight babies and high morbidity and mortality among the under five children . No research data are available for the study areas. Rates and associated factors might be varying here for quite different socio-demographic and ethnic composition of mother. More over researchers have shown inconsistent results in other areas of Bangladesh. The study was conducted to find out the prevalence of LBW and associated factors in the study area.
Materials and Methods
A hospital based descriptive cross-sectional study design was used in conducting this study. The study hypothesized that sociodemographic and nutritional factors affect the birth outcome.
This study was conducted in Sadar area Rangamati district. The Rangamati district is located in the south-eastern area of Bangladesh. It is the largest district of the country about 350 kilometers from capital Dhaka.
The total population in this study was 200. The study population comprised of pregnant mothers. The women were approached from Rangamati Matrimongol center, a non-government maternal care center.
The study instruments constitute a questionnaire emphasizing on socio-demographic data like name, address, age, occupation, husband’s occupation, education and maternal nutritional others data such as hemoglobin status, anemia, parity, gravitas, blood group, blood pressure, oedema, urine sugar, HbsAG and child data (date of delivery, gestational age, sex, birth weight). This study was conducted through an in-depth interview by administration of questionnaires.
Relevant information for the hospital based survey was gathered using a structured questionnaire. All the participants were interviewed at an arranged time, through a questionnaire that asked for maternal predictors. Another source of information that was used from the pregnant woman’s ANC card, which served as backing for gathering information such as blood pressure measurements, hemoglobin status, gestational age, number of parity and blood parameters. The value lower than 11 g/dL was considered anemia as recommended by the World Health Organization for a pregnant woman .
Means and standard deviations (SD) were calculated for all maternal anthropometric parameters, gestational age, and birth weight. The degree of correlation was measured between birth weight and maternal characteristics including hemoglobin status. Linear and logistic regression models were used to analyze data. Linear regression model was applied to observe the relationship between birth weight of child and maternal characteristics. Binary Logistic Regression model was used to estimate the probability of a binary response (birth weight, < 2500 gm=under normal and ≥ 2500 gm=normal) based on maternal characteristics, it allows say that the presence of a risk factor increases the probability of a given outcome by a specific percentage. Statistical analysis was performed using the software SPSS 16.0 and SAS 9.3 considering significance level 5%.
Descriptive statistics of maternal characteristics
Maternal characteristics where almost 40% mother belongs to less than 20 years group. High educated mother was 3.5% and 38.5% suffering from illiteracy. About 49 percentage mothers were married at teenage, on the contrary, there was no saying percentage above thirty years. The primipara mother’s percentage was 58.5% whereas the third gravida mothers were only 2.5%. Most of the gestational age was ≤ 37 weeks. Buddhist mothers comprise the 98% of the study population and, 86.5% mother was unemployed. On the other hand, 33.5% husband was unemployed. B+ blood group mother was 41% and the next 25% blood group was O+, clinically anemic mother was 75%, and nulliparous mother was 54% in this study. All participants were free from sugar, HbsAg and VDRL and the low birth outcome was 17% (Table 1).
Table 1. Descriptive statistics of maternal characteristics.
|Characteristics||Frequency ( N=200)||Percentage (%)|
|< 20 yrs||80||40|
|Graduate and above||7||3.5|
|Profession of mother|
|Age at marriage|
|< 20 yrs||99||49|
|Gestational age of the newborn|
|< 2.5 kg||34||17|
|2.5 -3.5 kg||136||68|
|Hb Concentration, g/dl|
Averages of maternal characteristics and birth weight
Maternal characteristics and birth weight, It showed that mother age range between 18 and 38, where maximum mother age was 25, and most of them were married in age 20 years. The systolic and diastolic blood pressure range was 90 to 170 and 60 to 120. The average hemoglobin level was 10.57 mg/dl. Most of the gestational age was 37 weeks. The minimum and maximum birth weight of child was 1.8 kg and 4.4 kg (Table 2).
Table 2. Averages of maternal characteristics and birth weight.
|Age of mother||25.12||4.54||25||18||38|
|Age of marriage||20.08||3.71||20||11||33|
|Blood pressure (sys)||121.98||17.31||120||90||190|
|Blood pressure (dias)||80.31||11.84||80||60||120|
|Gestational age (WKS)||36.77||1.89||37||27||42|
|Weight of child (kg)||3||0.45||3000||1.8||4.4|
Correlation of predictors with birth weight
The correlation between maternal characteristics and birth weight with p-value. It portrayed that all the parameters were insignificant except age of mother (P value=0.041) and hemoglobin (P value=0.038). There is a positive correlation between birth weight and age of mother. The means birth weight increases with age. There is positive relationship among gestational age, parity and birth weight. It also bears a negative relation between blood pressure and birth weight. That means one more reduction one will increase (Table 3).
Table 3. Pearson correlation between maternal characteristics and birth weight.
|Age of mother||Age of marriage||BP
|BP diastolic||Hb level||Gestational age|
|Weight of child||1|
|Age of mother||0.147**||1|
|Age of merry||0.069||0.516||1|
Effects of determinants on birth weight
The linear regression model was performed with backward selection method significance level staying 0.10 for all maternal characteristics and birth weight. The final model contains only two parameters and fits the model (F=1.39, p-value=0.11). It was observed from the Table 4 describes Parameter estimate of linear regression model that age and hemoglobin were positively related to birth weight. One unit increases in the age of mother and hemoglobin level corresponds to the 0.017 and 0.050 unit increased birth weight of the child. None of the other parameters were found significant in logistic regression model.
Table 4. Parameter estimate of linear regression model.
|Parameters||Estimate||St. Error||t Value||P-value|
|Age of mother||0.017||0.008||2.17||0.0313|
In this study, the prevalence of LBW was 17%. This result is almost consistent with  in Nigeria where it was 14% in their study. But the survey of South Asian countries (2003-2004) showed that the prevalence was 36% in Bangladesh, 30% in India, 21% in Nepal, 15% in Bhutan and, 22% in Maldives. That differences with Bangladesh data may be due to this was a hospital based study and conducted in a different ethnic society where 98% was chakma mothers. Mean birth weight was found 3000 gms. In the study which was very similar 2961 gm by reported by Deshmukh JS et al.  in Bangladesh and a bit lower 2669 gms by Manyeh AK et al.  in India. In this study, there was a significant association between the age of the mothers and low birth weight. Similar types of results were found by Bugssa G  in Ghana and by Johnson D  in Northern Ethiopia. But opposite information described for Georgia, where low birth was insignificantly associated maternal age. Findings of the relation of LBW with gestational age and educational level were not found to be statistically significant. But significant associated found by Ahankari A et al. . Also correlate with the observation in Pakistan . But significant association observed by John G . Although, no association noticed by the study done by . An inverse relationship between birth weight and blood pressure was also found in this study, which was supported by the studies of other researchers [23,24]. Even though, significant relationship reported .
This study suggests that there is several factors interplay which leads to low birth weight babies in the study area. Socio demographic factors like maternal age, educational level, economic status, nutritional status, and anemia are very important. The results of this study suggest that for reducing low birth weight, the strategy needs to focus attention on nutrition education to facilitate better weight gain during pregnancy encouraging wider birth interval and discouraging teenage pregnancy.
The authors expressed deep gratitude to Rangamati Matrimongol center, a maternal health care center, for make unrestricted opportunity and logistic support to collect the necessary data. The contributions of all doctors and technicians and field health workers of the clinic related to this work are gratefully acknowledged. Finally, the authors would like to thank all participating mothers who took part in this study.
The study was approved by the Medical Ethical Committee of the Rangamati Matrimongol center, headed by the director of clinic. All procedures performed in studies were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
Informed consent was obtained from all individual participants included in the study. Author disclosure. All authors contributed substantially to, the design and drafting of work, critical review, and approved the final version of the manuscript for submission.
Conflict of Interest
All authors declare that they have no conflicts of interest.
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