MODELLING THE RISK FACTORS FOR BIRTH WEIGHT IN TWIN GESTATIONS: A QUANTILE REGRESSION APPROACH

2017 ◽  
Vol 49 (6) ◽  
pp. 744-756 ◽  
Author(s):  
A. John Michael ◽  
Belavendra Antonisamy ◽  
S. Mahasampath Gowri ◽  
Ramasami Prakash
Keyword(s):  
Risk Factors ◽  
Birth Weight ◽  
Low Birth Weight ◽  
Quantile Regression ◽  
Gestational Age ◽  
Weight Distribution ◽  
Ordinary Least Squares ◽  
Child Growth ◽  
Birth Weight Distribution ◽  
Different Parts

SummaryBirth weight is used as a proxy for the general health condition of newborns. Low birth weight leads to adverse events and its effects on child growth are both short- and long-term. Low birth weight babies are more common in twin gestations. The aim of this study was to assess the effects of maternal and socio-demographic risk factors at various quantiles of the birth weight distribution for twin gestations using quantile regression, a robust semi-parametric technique. Birth records of multiple pregnancies from between 1991 and 2005 were identified retrospectively from the birth registry of the Christian Medical College and hospitals in Vellore, India. A total of 1304 twin pregnancies were included in the analysis. Demographic and clinical characteristics of the mothers were analysed. The mean gestational age of the twins was 36 weeks with 51% having preterm labour. As expected, the examined risk factors showed different effects at different parts of the birth weight distribution. Gestational age, chroniocity, gravida and child’s sex had significant effects in all quantiles. Interestingly, mother’s age had no significant effect at any part of the birth weight distribution, but both maternal and paternal education had huge impacts in the lower quantiles (10thand 25th), which were underestimated by the ordinary least squares (OLS) estimates. The study shows that quantile regression is a useful method for risk factor analysis and the exploration of the differential effects of covariates on an outcome, and exposes how OLS estimates underestimate and overestimate the effects of risk factors at different parts of the birth weight distribution.

scholarly journals Leisure-Time Physical Activity in Pregnancy and the Birth Weight Distribution: Where Is the Effect?

2012 ◽  
Vol 9 (8) ◽  
pp. 1168-1177 ◽  
Author(s):  
Lanay M. Mudd ◽  
Jim Pivarnik ◽  
Claudia B. Holzman ◽  
Nigel Paneth ◽  
Karin Pfeiffer ◽  
...  
Keyword(s):  
Physical Activity ◽  
Birth Weight ◽  
Quantile Regression ◽  
Gestational Age ◽  
Weight Distribution ◽  
Leisure Time ◽  
Leisure Time Physical Activity ◽  
Large For Gestational Age ◽  
Birth Weight Distribution

Background:Leisure-time physical activity (LTPA) is recommended during pregnancy and has been associated with lower risk of delivering a large infant. We sought to characterize the effect of LTPA across the entire birth weight distribution.Methods:Women enrolled in the Pregnancy Outcomes and Community Health (POUCH) Study (1998–2004) were followed-up in 2007. Follow-up efforts were extensive for a subcohort and minimal for the remainder (nonsubcohort). Thus, 596 subcohort and 418 nonsubcohort women who delivered at term participated. Offspring were categorized as small-, appropriate-, or large-for-gestational-age (SGA, AGA, and LGA, respectively) based on gender and gestational age-specific birth weight z-scores (BWz). At follow-up, women recalled pregnancy LTPA and were classified as inactive, insufficiently active or meeting LTPA recommendations. Linear, logistic, and quantile regression analyses were conducted separately by subcohort status.Results:Meeting LTPA recommendations decreased odds of LGA significantly among the nonsubcohort (aOR = 0.30, 95% CI: 0.14–0.64) and nonsignificantly among the subcohort (aOR = 0.68, 95% CI: 0.34–1.34). In quantile regression, meeting LTPA recommendations reduced BWz among the upper quantiles in the nonsubcohort.Conclusions:LTPA during pregnancy lowered odds of LGA and reduced BWz among the upper quantiles, without shifting the entire distribution. LTPA during pregnancy may be useful for reducing risks of large fetal size.

Neurodevelopmental outcome in infants with esophageal atresia: risk factors in the first year of life

2020 ◽  
Author(s):  
Bevilacqua Francesca ◽  
Ragni Benedetta ◽  
Conforti Andrea ◽  
Braguglia Annabella ◽  
Gentile Simonetta ◽  
...  
Keyword(s):  
Risk Factors ◽  
Birth Weight ◽  
Cognitive Development ◽  
Low Birth Weight ◽  
Multiple Regression ◽  
Esophageal Atresia ◽  
Gestational Age ◽  
Motor Development ◽  
First Year ◽  
First Year Of Life

Summary Data on neurodevelopmental outcomes of infants born with esophageal atresia (EA) are still scarce and controversial. The aims of our study were to evaluate motor and cognitive development during the first year of life, in patients operated on of EA and to investigate potential risk factors for motor and cognitive development both at 6 and 12 months. This is an observational prospective longitudinal study in a selected cohort of type C and D EA infants enrolled in our follow-up program from 2009 to 2017. In order to exclude possible confounding factors, the following exclusion criteria were applied: (i) gestational age ≤ 32 weeks and/or birth weight ≤ 1500 g; (ii) genetic syndrome or chromosomal anomaly known to be associated with neurodevelopmental delay; (iii) neurologic disease; (iv) esophageal gap ≥three vertebral bodies. Patients were evaluated at 6 and 12 months of life (corrected age for infants with a gestational age of 32–37 weeks) with the Bayley Scales of Infant and Toddler Development—3rd Edition. In our selected cohort of EA infants, 82 were evaluated at 6 months and 59 were reevaluated at 12 months. Both Motor and Cognitive average scores were within the norm at both time points. However, we report increased number of infants with motor delay with time: 14% at 6 months and 24% at 12 months. Multiple regression analysis for Motor scores at 6 [F(4,74) = 4.363, P = 0.003] and 12 months [F(6,50) = 2.634, P = 0.027] identified (i) low birth weight, (ii) longer hospital stay and (iii) weight < fifth percentile at 1 year as risk factors. Interestingly, average Cognitive scores also increased with time from 85.2% at 6 months and 96.6% at 12 months. Multiple regression models explaining variance of Cognitive scores at 6 [F(4, 73) = 2.458, P = 0.053] and 12 months [F(6, 49) = 1.232, P = 0.306] were nonsignificant. Our selected cohort of EA patients shows, on the average, Motor and Cognitive scores within the norm both at 6 and 12 months. Nevertheless, the percentage of infants with Motor scores below the average increases regardless gestational age. None of clinical and sociodemographic variables taken into consideration was able to predict cognitive development both at 6 and 12 months whereas risk factors for Motor development change during the first year of life. Healthcare providers should pay particular attention to patients with low birth weight, longer hospital stays and weight under fifth percentile at 1 year. Future studies should include long-term outcomes to reveal possible catch up in motor development and/or possible findings in Cognitive scores.

Geographical Distribution and Risk Factors of Low Birth Weight in Nigeria

2020 ◽  
Vol 10 (4) ◽  
pp. 234-248
Author(s):  
Richard Adeleke ◽  
Tolulope Osayomi ◽  
Ayodeji E. Iyanda
Keyword(s):  
Risk Factors ◽  
Birth Weight ◽  
Low Birth Weight ◽  
Prevalence Rate ◽  
Spatial Epidemiology ◽  
Ordinary Least Squares ◽  
Health Concern ◽  
Geographical Differences ◽  
Spatial Error ◽  
Geographical Variations

BACKGROUNDLow birth weight (LBW) directly or indirectly accounts for 60% to 80% of all neonatal deaths globally, and it has become an issue of serious health concern with Nigeria with one of the highest infant mortality rates (74/1,000) in the world. Despite the severe health impact, little is understood on the geographical differences in maternal socioeconomic and environmental factors that affect LBW across the states in Nigeria.METHODUsing the spatial epidemiological approach, this study examined the geographical variations in LBW and associated risk factors in Nigeria with the aid of spatial statistics.RESULTSThere was a regional LBW corridor in the extreme north with Yobe state with the highest prevalence rate. Maternal educational attainment and acute maternal malnutrition explained 65.4% (ordinary least squares model) and 70.5% (spatial error model, SEM) of the variation in the geographical pattern of LBW.CONCLUSIONLBW remains an issue of serious health concern in Nigeria. The finding of this study would shed more light on the spatial epidemiology of LBW in Nigeria and also guide public health programs in curtailing the high prevalence rate of LBW.RECOMMENDATIONSThe study recommends health education on nutrition in pregnancy and the need to improve health literacy among women so as to check the high LBW prevalence.

scholarly journals Intraventricular hemorrhage in very low birth weight infants: associated risk factors and outcome in the neonatal period

1999 ◽  
Vol 54 (5) ◽  
pp. 151-154 ◽  
Author(s):  
Monique Catache Mancini ◽  
Naila Elias Barbosa ◽  
Débora Banwart ◽  
Sandra Silveira ◽  
José Luiz Guerpelli ◽  
...  
Keyword(s):  
Risk Factors ◽  
Mechanical Ventilation ◽  
Birth Weight ◽  
Low Birth Weight ◽  
Gestational Age ◽  
Intraventricular Hemorrhage ◽  
Very Low Birth Weight ◽  
Periventricular Leukomalacia ◽  
Associated Risk Factors ◽  
Length Of Hospitalization

Intraventricular hemorrhage (IVH) is a severe complication in very low birth weight (VLBW) newborns (NB). With the purpose of studying the incidence of IVH, the associated risk factors, and the outcomes for these neonates, we studied all the VLBW infants born in our neonatal unit. Birth weight, gestational age, presence of perinatal asphyxia, mechanical ventilation, length of hospitalization, apnea crisis, hydrocephalus, and periventricular leukomalacia were analyzed. The diagnosis of IVH was based on ultrasound scan studies (Papile's classification) performed until the tenth day of life and repeated weekly in the presence of abnormalities. Sixty-seven/101 neonates were studied. The mortality rate was 30.6% (31/101) and the incidence of IVH was 29.8% (20/67) : 70% grade I, 20% grade III and 10% grade IV. The incidence of IVH in NB <1,000 g was 53.8% (p = 0.035) and for gestational age <30 weeks was 47.3% (p = 0.04), both considered risk factors for IVH. The length of hospitalization (p = 0.00015) and mechanical ventilation (p = 0.038) were longer in IHV NB. The IVH NB had a relative risk of 2.3 of developing apnea (p = 0.02), 3.7 of hydrocephalus (p = 0.0007), and 7.7 of periventricular leukomalacia (p < 0.00001). The authors emphasize the importance of knowing the risk factors related to IVH so as to introduce prevention schemes to reduce IVH and to improve outcomes of affected newborns.

scholarly journals Prevalence and Analysis of Inborn Birth Defects in A Tertiary Level Hospital in Bangladesh

2019 ◽  
Vol 3 (5) ◽  
Keyword(s):  
Risk Factors ◽  
Birth Weight ◽  
Low Birth Weight ◽  
Congenital Malformation ◽  
Live Birth ◽  
Birth Defects ◽  
Gestational Age ◽  
Still Birth ◽  
New Born ◽  
Icd 10

Objective: To assess the prevalence of congenital defects and to investigate the maternal and perinatal aspects in relation to the detailed ICD-10 coding of each individual case using The New Born Data base NBBD data collection system under Global surveillance in collaboration with Center for Disease Control CDC, Atlanta and All India Institute of Medical Science AIMS, New Delhi and Bangabandhu Sheikh Mujib Medical University BSMMU as the Focal point of investigation. Methods: All births and terminations of pregnancy beyond 24 weeks with structural and sonographically detectable birth defects from October,2014 to October, 2018 in the Department of Obstetrics and Gynaecology of Bangladesh Medical College and Hospital were carefully scrutinized and detailed information regarding the maternal and associated clinical risk factors were compiled using the NBBD (New Born Birth Defects) surveillance system. Among that period all births (Live birth and still birth) were counted to have a prevalence data of birth defects using the total number of births as the denominator and the number of birth defects as the numerator. Results: The prevalence of detectable birth defects among the 2002 total births (which includes 110 still births) was found to be 4.34% (87/2002 x 100). According to birth defect category using the ICD-10 coding system, 11 broad categories were found. Musculoskeletal deformities Q65-Q79 were the highest (25/87), followed by congenital malformation of the nervous system Q00-Q07(15/87) and congenital malformation of eye, ear, face and neck Q10-Q18(14/87). The birth defects were categorized as isolated, syndrome and sequence; among the 87 cases, 44 were isolated defects, 40 were syndromic / multiple birth defects and 3 were result of Potter sequence. Regarding maternal variables, maternal age<18 years was 23.4%, 18-25 years was 48.93% ,26-33 years was 23.4% and ≥ 34 years was 6.4%; father’s age < 35 yearswas 74.5% and ≥ 35 years 25.5%%, parental consanguinity was present in 4.3% of case. Analyzing the variables relating to labour conditions, majority of pregnancies were singletons 95.7% leaving only 4.3% of pregnancies being Twin pregnancies. Reviewing babies according to gestational age, 69 (73.4%%) of babies were less than 34 weeks and 26.6% remaining were equal to/more than 34 weeks of gestation reflecting a higher frequency of prematurity or pre-term delivery either induced or spontaneous onset. Regarding the mode of delivery, vaginal birth was conducted in approximately 74% of cases and C-Section was performed in remaining cases, the indication of C-section was guided by obstetric causes such as previous C-section and maternal desire for an elective abdominal delivery. Results of the foetal variables by sex distribution showed a significant male predominance (51/87) 51 male, 26 female and 10 ambiguous. Reviewing babies according to gestational age, 64 (73.4%%) of babies were less than 34 weeks and 26.6% remaining were more than 34 weeks of gestation reflecting a higher frequency of prematurity. The studied foetal variable as categorized by weight, as ≤1500gm (extreme low birth weight ELBW) was 23.4%, 1501-2499gm (Low birth weight LBW) was 50% and ≥2500g (Average birth weight) was 26.6 %. The studied foetal variable as categorized by percentage of babies that were born live birth was 87%, 17 % were stillbirth: a significant portion of those terminated late were found macerated. Data was also compiled regarding the following risk factors: Previous history of birth defects/ previous still birth/ previous spontaneous abortions/ terminations for birth defects which did not reveal significant differences. Conclusion: The study notified only the most visible defects in most cases. However, the study is part of an ongoing surveillance program which has incited much alertness among the participants regarding documentation. The prevalence records and the type of defects may help in the expansion of these programs for the development of future preventive strategies.

scholarly journals Prevalence and risk factors associated with low birth weight babies-a cross sectional study

2021 ◽  
Vol 8 (7) ◽  
pp. 1168
Author(s):  
Gurunathan Gopal
Keyword(s):  
Risk Factors ◽  
Birth Weight ◽  
Low Birth Weight ◽  
Gestational Age ◽  
Cross Sectional Study ◽  
Sectional Study ◽  
Cross Sectional ◽  
Maternal Risk ◽  
Factors Associated ◽  
The World

Background: Babies with a birth weight of less than 2500 grams, irrespective of the period of their gestation are termed as low birth weight (LBW) babies. Despite consistent efforts to improve the quality of maternal and child health, more than twenty million LBW babies are born every year throughout the world. The present study was to explore the effects of various maternal risk factors associated with low birth-weight of institutionally delivered newborns. Across the world, neonatal mortality is 20 times more likely for LBW babies compared to normal birth weight (NBW) babies (>2.5 kg).Methods: A cross sectional study was conducted in neonatal intensive care unit (NICU) of ACS Medical College and Hospital, Chennai from December 2019 to October 2020. Altogether 350 babies were taken who were delivered at ACS hospital.Results: The number of times of ANC attendance was also significantly associated with LBW, odds ratio (OR)=1.296, and p=0.001. The number of meals was not associated with LBW OR=0.946, and p=0.831. The gestational age assessed as completed weeks of pregnancy was significantly associated with LBW OR=3.302; p=0.00001.Conclusions: This study suggests that there are several factors interplaying which lead to LBW babies. Socio-demographic factors (maternal age and gestational age) and antenatal care are more important.

scholarly journals Determination of Factors Associated with Low Birth Weight among Babies Born in Sulaimania City, Kurdistan-Iraq

2020 ◽  
Vol 62 (3) ◽  
Author(s):  
Sardar Weli
Keyword(s):  
Risk Factors ◽  
Birth Weight ◽  
Low Birth Weight ◽  
Chronic Diseases ◽  
Gestational Age ◽  
Kurdistan Region ◽  
Level Of Education ◽  
Factors Associated ◽  
Low Level

Background: Low birth weight (LBW) is the main leading cause of infant death. It is contributing to a variety of short and long term poor health outcomes. Determination of risk factors associated with LBW is important to select a suitable action to prevent or reduce this outcome. Studies on LBW and maternal risk factors in the Kurdistan region of Iraq are scarce.Objectives: This study aimed to determine risk factors associated with Low birth weight in Sulaimania city, Kurdistan region of Iraq.Cases and Methods: This study was carried out in the Maternity Hospital in Sulaimania from first of July, 2019 to first of February, 2020. Participants were 300 randomly selected mothers who gave a live birth. The questionnaire form, which contains information about factors associated with low birth weight (infant’s weight at birth lower than 2.5 kg) were filled by collectors. Infants were weighed immediately after delivery, and the weight was recorded in addition to sex of the infants, gestational age (weeks), age of the mother, job of the mothers, mother’s educational levels, antenatal care attendance, gravidity, residency, exercise and history of chronic diseases of mothers were recorded.Results: The results of the present study indicate that LBW was reported in 44.7% of the participants. For the LBW group, 48.5% were males and 51.5% were females. The highest percentage of LBW was among those born preterm 75.4% and the lowest was among full term 24.6%. Many factors such as an employed mother (85.8%), no exercise during pregnancy (88.1%), residency in urban (61.9%), mothers with chronic diseases (86.6%) and low level of education (illiterate and primary) (67.9%) were found as the significant risk factors of LBW. However, other factors such as prenatal care visits, age of mothers and gravidity were not found to be associated with LBW.Conclusion: The current study concludes that multiple risk factors may be associated with LBW in Sulaimania city, Kurdistan region of Iraq. Gestational age (preterm delivery), working mothers, no regular exercise, urban residence, low level of education and mother’s diseases such as hypertension, respiratory conditions, chronic infections and diabetes mellitus were considered as the risk factors associated with LBW.

scholarly journals NEONATAL HYPOGLYCEMIA

2018 ◽  
Vol 21 (04) ◽  
pp. 745-749
Author(s):  
Sikandar Ali Bhand ◽  
Farzana Sheikh ◽  
Abdul Rehman Siyal ◽  
Muhammad Akber Nizamani ◽  
Muhammad Saeed
Keyword(s):  
Risk Factors ◽  
Birth Weight ◽  
Family History ◽  
Low Birth Weight ◽  
Gestational Age ◽  
Metabolic Disorder ◽  
Maternal Risk Factors ◽  
Diabetic Mellitus ◽  
Maternal Risk ◽  
History Of

… Objective: To determine the presenting features and assessment of the neonateswith hypoglycemia along with maternal and neonatal risk factors for hypoglycemia. Subjects &methods: All consecutive neonates with hypoglycemia admitted were included in the study.Demographic characteristics of the mothers and their babies, past medical history and illnessesduring pregnancy especially that, of diabetes mellitus and duration, details of the management oflabour and place of delivery, birth asphyxia as well as history of feeding prior to admission. All therisk factors and clinical features were documented. Results: From presenting features neonateswere most common temperature instability 32% of the neonates. Maternal risk factors were asMaternal diabetic mellitus, Intrapartum administration of glucose , Maternal drug uses as: (Betablockers, Oral hypoglycemic agents, Valproate), family history of metabolic disorder and withoutany factors with the percentage 13%, 17%, (15%, 08%, 07%) , 27% and 13% respectively.Neonatal risk factors of the patients were found low birth weight 49%, small gestational age 26%,macrosomia 11%, respiratory distress 32%, sepsis 20%, hypothermia 25%, congenital cardiacabnormalities 4%, endocrine disorder 4%, family history of metabolic disorder 7%, inborn errorsof metabolism 4%, rhesus hemolytic disease 5%, erythroblastosis fetalis 1%, inadequate feeding35% and neonates without factors were 6%. Conclusions: The risk factors associate withneonatal hypoglycemia are, low birth weight, small gestational age, macrodome, respiratorydistress, sepsis, hypothermia and inadequate feeding , and maternal risk factors associate toneonatal hypoglycemia was Eclampsia, Maternal diabetic mellitus, and maternal drug uses

scholarly journals Late hyponatremia: its risk factors in preterm infants and short-term outcome

2021 ◽  
Vol 43 (5) ◽  
pp. 434-443
Author(s):  
Manizheh Gharehbaghi ◽  
Sadollah Yegane Dust ◽  
Elmira Naseri
Keyword(s):  
Risk Factors ◽  
Birth Weight ◽  
Low Birth Weight ◽  
Preterm Infants ◽  
Bronchopulmonary Dysplasia ◽  
Gestational Age ◽  
Short Term ◽  
Term Outcome ◽  
Short Term Outcome ◽  
Osteopenia Of Prematurity

Background. Prematurity is one of the major health problems and common causes of neonatal mortality. One of the complications of premature infants is hyponatremia. The effect of hyponatremia on the prognosis of preterm infants has not been well studied. This study aimed to evaluate infants with late hyponatremia, its risk factors, and prognosis. Methods. This descriptive analytical study reviewed preterm infants (<34 weeks) admitted to Al-Zahra or Children’s Hospital in Tabriz for one year (2019). Neonates diagnosed with hyponatremia after the second week were identified and evaluated for risk factors and short-term outcome. Results. A total of 186 neonates were studied. The mean gestational age of the neonates was 30 weeks (first and third quarters = 29-32 weeks). 101 (54.3%) infants were male. The route of delivery was the cesarean section in 60.7% of cases. Late hyponatremia was present in 50 (26.8 %) infants. Gestational age and birth weight were significantly lower in infants with hyponatremia than in the control group. Multivariate analysis showed that low birth weight, the use of prenatal steroids, and inappropriate weight for gestational age status independently predict the incidence of late hyponatremia. There was a significant relationship between the presence of prolonged late hyponatremia (over 7 days) and bronchopulmonary dysplasia and osteopenia of prematurity. However, no significant association was found between the presence of prolonged late hyponatremia in preterm infants with the length of hospital stay and in-hospital mortality. Conclusion. Based on the findings of this study, low birth weight, prenatal steroid use, and lack of appropriate weight for gestational age were risk factors for late hyponatremia in preterm infants. Prolonged hyponatremia is associated with bronchopulmonary dysplasia and osteopenia of prematurity

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