Excess female deaths among rural Bangladeshi children: an examination of cause-specific mortality and morbidity

Geographical Origin, WASH Access, and Clinical Descriptions for Patients Admitted to a Cholera Treatment Center in Northwest Syria between October and December 2022

Background  On September 10, 2022, a cholera outbreak was declared in Syria for the first time in over a decade of protracted conflict. As of May 20, 2023, 132,782 suspected cases had been reported, primarily in northwest and northeast Syria. We aim to provide a detailed description of water sources and clinical status of a patient cohort seen at a cholera treatment center (CTC) in northwest Syria. Methods  We retrospectively identified patients with confirmed cholera who presented to the CTC in Idlib governorate between October 8 and December 18, 2022. Data were obtained from clinical case records and analyzed in R v4.0.4. Results  Ninety-four patients (55.3% men) were treated at the CTC. Thirty-five patients were severely dehydrated (Plan C treatment), 54 had some dehydration (Plan B), and 5 had no dehydration (Plan A). Most patients were between 11 and 20 years old ( n  = 25, 26.6%) or 31 and 40 years old ( n  = 19, 20.2%). Note that 70.2% ( n  = 66) of patients were seen in November 2022 and most were from Harim district ( n  = 44, 46.8%). Public wells ( n  = 46, 48.9%) and water trucking ( n  = 41, 43.6%) were the most commonly used water sources. Note that 76.6% ( n  = 72) did not have access to chlorine-treated water. Forty-seven patients (50%) had more than five water, sanitation, and hygiene (WASH)-related cholera risk factors. Following treatment, six patients were transferred to another treatment center, three died (case fatality rate: 3.2%), and the remainder were discharged. Conclusion  Most patients reported WASH-related risk factors for cholera, reflecting the poor state of WASH in northwest Syria after over a decade of conflict. This relates to the direct and indirect impacts of urban and periurban violence as well as the underfunded humanitarian response. Strengthening WASH and health promotion are important components to control the outbreak.

Do Social Pensions Affect the Physical and Mental Health of Rural Children in China? An Intergenerational Care Perspective

Research Purpose: This study aimed to explore the effect of China’s New Rural Pension (NRP) on the physical and mental health of rural children from the perspective of intergenerational care, and to examine whether family childcare types and the child’s gender affect the relationships between social pensions and the physical and mental health of rural children. Methods: We used data from the 2016 China Family Panel Studies (CFPS) of the China Social Science Survey Center, a nationally representative sample at the individual, family, and county levels from 25 provinces (cities and districts) in China. A total of 2142 sets of valid samples of children, the elderly, family economic and social conditions, and basic family information were retained after data screening. The regression discontinuity (RD) method was employed for the statistical analyses. Results: The NRP had a significant effect on both the mental health (β = −2.818, p < 0.1) and physical health (β = −2.214, p < 0.1) of rural children. This effect varied with the family childcare type and child’s gender. Conclusions: We reveal a positive effect of the NRP on the physical and mental health of rural children. Therefore, the establishment of a social pension system may be used as an effective approach to enhance the health of rural children. The impact of the NRP on the physical and mental health of children differs with the family childcare type and their gender, which should be taken into consideration when using social pensions to enhance child health.

Variants of ctxB alleles of Vibrio cholerae O1 caused sequential cholera outbreaks in the tribal areas of Odisha, India

Cholera localized outbreaks/epidemics accounting for high morbidity and mortality have been reported in different years both from the coastal and tribal districts of Odisha. In the present study, the emergence and spread of two sequential cholera outbreaks reported in July to October 2012 from Rayagada and Kalahandi districts of Odisha was investigated. Environmental water samples from different sources and rectal swabs from diarrhoea patients were analysed for identification, antibiogram profiles and molecular studies using DMAMA-PCR assays. The pulsed field gel electrophoresis (PFGE) was done on some selected Vibrio cholerae O1 strains isolated from these cholera outbreak areas. Results showed 42% of rectal swabs and 2.3% of water samples collected from both the districts were positive for Vibrio cholerae O1 Ogawa biotype El Tor carrying both ctxB1 and ctxB7 genotypes. The common resistance profile of V. cholerae O1 strains was ampicillin, nalidixic acid, furazolidone and co-trimoxazole. The PFGE analysis on selected V. cholerae O1 strains of ctxB1 and ctxB7 genotypes showed three pulsotypes with 96% similarity matrix exhibiting the relationship with their respective water sources. Hence, continuous surveillance is highly essential to monitor the antibiogram profile and changing pattern of ctxB genotypes of V. cholerae O1 in this region.

A scoping review of methods for assessment of sex differentials in early childhood mortality

BACKGROUND

While assessment of sex differentials in child mortality is straightforward, their interpretation must consider that, in the absence of gender bias, boys are more likely to die than girls. The expected differences are also influenced by levels and causes of death. However, there is no standard approach for determining expected sex differences.

METHODS

We performed a scoping review of studies on sex differentials in under-five mortality, using PubMed, Web of Science, and Scopus databases. Publication characteristics were described, and studies were grouped according to their methodology.

RESULTS

From the 17,693 references initially retrieved we included 154 studies published since 1929. Indian, Bangladeshi, and Chinese populations were the focus of 44% of the works, and most studies addressed infant mortality. Fourteen publications were classified as reference studies, as these aimed to estimate expected sex differentials based upon the demographic experience of selected populations, either considered as gender-neutral or not. These studies used a variety of methods - from simple averages to sophisticated modeling - to define values against which observed estimates could be compared. The 21 comparative studies mostly used life tables from European populations as standard for expected values, but also relied on groups without assuming those values as expected, otherwise, just as comparison parameters. The remaining 119 studies were categorized as narrative and did not use reference values, being limited to reporting observed sex-specific estimates or used a variety of statistical models, and in general, did not account for mortality levels.

CONCLUSION

Studies aimed at identifying sex differentials in child mortality should consider overall mortality levels, and report on more than one age group. The comparison of results with one or more reference values, and the use of statistical testing, are strongly recommended. Time trends analyses will help understand changes in population characteristics and interpret findings from a historical perspective.

Disparities by sex in care-seeking behaviors and treatment outcomes for pneumonia among children admitted to hospitals in Bangladesh

Background

Incidence of community acquired pneumonia is high globally. In Bangladesh, more male children than female children are brought to hospitals for pneumonia. We examined if there was disparities in the severity of illness and outcome by sex among children who were admitted with pneumonia to hospitals in Bangladesh.

Methods

Hospitalized children, aged 2 to 59 months, meeting a case definition of pneumonia were recruited in seven hospitals following parental consent. At baseline, study doctors obtained socio-demographic characteristics and care seeking behaviors for pneumonia, and then clinical data were collected throughout the hospital stay. Multivariate analysis was performed to determine if the sex of the child had a relationship with either illness severity on admission or outcome in the hospital.

Results

Between May 2004 and December 2008, 6,856 children, including 35% females, were recruited. A total of 1,371 (19.9%) children had non-severe pneumonia, 4,118 (60.0%) had severe pneumonia, and 1,367 (19.9%) had very severe pneumonia. A higher proportion of hospitalized females had very severe pneumonia as compared to males (21.5% versus 19.1%; P = 0.01), but there was no difference by sex in the proportion of children with severe or non-severe pneumonia. There was no difference by sex observed in the clinical management provided in the hospital, but a greater proportion of females (4.7%) as compared to males (3.6%) died in hospitals (P = 0.04). In multivariate analyses, female sex was associated with very severe pneumonia on admission (OR: 1.26, 95% CI: 1.09–1.47) and fatal outcome in the hospitals (OR: 1.31, 95% CI: 1.01–1.71). Death in female children admitted with very severe pneumonia was 4 times higher than that reported in males (OR: 4.37, 95% CI: 3.24–5.89).

Conclusion

Our data demonstrates a sex-based disparity in the severity of pneumonia and deaths among children admitted to hospitals in Bangladesh, despite no existing disparity by sex in hospital treatment. These findings call for further investigations to explore the determinants of health seeking behavior by parents with children with pneumonia in a community that favors males to females, and to understand the role of differences by sex in childhood pneumonia outcomes in Bangladesh.

Enhanced sensitivity to cholera toxin in female ADP-ribosylarginine hydrolase (ARH1)-deficient mice

Cholera toxin, an 84-kDa multimeric protein and a major virulence factor of Vibrio cholerae, uses the ADP-ribosyltransferase activity of its A subunit to intoxicate host cells. ADP-ribosylation is a posttranslational modification of proteins, in which the ADP-ribose moiety of NAD⁺ is transferred to an acceptor. In mammalian cells, ADP-ribosylation of acceptors appears to be reversible. ADP-ribosyltransferases (ARTs) catalyze the modification of acceptor proteins, and ADP-ribose-acceptor hydrolases (ARHs) cleave the ADP-ribose-acceptor bond. ARH1 specifically cleaves the ADP-ribose-arginine bond. We previously demonstrated a role for endogenous ARH1 in regulating the extent of cholera toxin-mediated fluid and electrolyte abnormalities in a mouse model of intoxication. Murine ARH1-knockout (KO) cells and ARH1-KO mice exhibited increased sensitivity to cholera toxin compared to their wild-type (WT) counterparts. In the current report, we examined the sensitivity to cholera toxin of male and female ARH1-KO and WT mice. Intestinal loops derived from female ARH1-KO mice when injected with cholera toxin showed increased fluid accumulation compared to male ARH1-KO mice. WT mice did not show gender differences in fluid accumulation, ADP-ribosylarginine content, and ADP-ribosyl Gαs levels. Injection of 8-Bromo-cAMP into the intestinal loops also increased fluid accumulation, however, there was no significant difference between female and male mice or in WT and KO mice. Female ARH1-KO mice showed greater amounts of ADP-ribosylated Gαs protein and increased ADP-ribosylarginine content both in whole intestine and in epithelial cells than did male ARH1-KO mice. These results demonstrate that female ARH1-KO mice are more sensitive to cholera toxin than male mice. Loss of ARH1 confers gender sensitivity to the effects of cholera toxin but not of cyclic AMP. These observations may in part explain the finding noted in some clinical reports of enhanced symptoms of cholera and/or diarrhea in women than men.

Causes of and contributors to infant mortality in a rural community of North India: evidence from verbal and social autopsy

OBJECTIVE

To identify the medical causes of death and contribution of non-biological factors towards infant mortality by a retrospective analysis of routinely collected data using verbal and social autopsy tools.

SETTING

The study site was Health and Demographic Surveillance System (HDSS), Ballabgarh, North India PARTICIPANTS: All infant deaths during the years 2008-2012 were included for verbal autopsy and infant deaths from July 2012 to December 2012 were included for social autopsy.

OUTCOME MEASURES

Cause of death ascertained by a validated verbal autopsy tool and level of delay based on a three-delay model using the INDEPTH social autopsy tool were the main outcome measures. The level of delay was defined as follows: level 1, delay in identification of danger signs and decision making to seek care; level 2, delay in reaching a health facility from home; level 3, delay in getting healthcare at the health facility.

RESULTS

The infant mortality rate during the study period was 46.5/1000 live births. Neonatal deaths contributed to 54.3% of infant deaths and 39% occurred on the first day of life. Birth asphyxia (31.5%) followed by low birth weight (LBW)/prematurity (26.5%) were the most common causes of neonatal death, while infection (57.8%) was the most common cause of post-neonatal death. Care-seeking was delayed among 50% of neonatal deaths and 41.2% of post-neonatal deaths. Delay at level 1 was most common and occurred in 32.4% of neonatal deaths and 29.4% of post-neonatal deaths. Deaths due to LBW/prematurity were mostly followed by delay at level 1.

CONCLUSION

A high proportion of preventable infant mortality still exists in an area which is under continuous health and demographic surveillance. There is a need to enhance home-based preventive care to enable the mother to identify and respond to danger signs. Verbal autopsy and social autopsy could be routinely done to guide policy interventions aimed at reduction of infant mortality.

A sexually dimorphic effect of cholera toxin: rapid changes in colonic motility mediated via a 5-HT3 receptor-dependent pathway in female C57Bl/6 mice

KEY POINTS

Cholera causes more than 100,000 deaths each year as a result of severe diarrhoea, vomiting and dehydration due to the actions of cholera toxin; more females than males are affected. Cholera toxin induces hypersecretion via release of mucosal serotonin and over-activation of enteric neurons, but its effects on gastrointestinal motility are not well characterized. We found that cholera toxin rapidly and reversibly reduces colonic motility in female mice in oestrus, but not in males or females in prooestrus, an effect mediated by 5-HT in the colonic mucosa and by 5-HT3 receptors. We show that the number of mucosal enterochromaffin cells containing 5-HT changes with the oestrous cycle in mice. These findings indicate that cholera toxin's effects on motility are rapid and depend on the oestrous cycle and therefore can help us better understand differences in responses in males and female patients.

ABSTRACT

Extensive studies of the mechanisms responsible for the hypersecretion produced by cholera toxin (CT) have shown that this toxin produces a massive over-activation of enteric neural secretomotor circuits. The effects of CT on gastrointestinal motility, however, have not been adequately characterized. We investigated effects of luminal CT on neurally mediated motor activity in ex vivo male and female mouse full length colon preparations. We used video recording and spatiotemporal maps of contractile activity to quantify colonic migrating motor complexes (CMMCs) and resting colonic diameter. We compared effects of CT in female colon from wild-type and mice lacking tryptophan hydroxylase (TPH1KO). We also compared CMMCs in colons of female mice in oestrus with those in prooestrus. In female (but not male) colon, CT rapidly, reversibly and concentration-dependently inhibits CMMC frequency and induces a tonic constriction. These effects were blocked by granisetron (5-HT3 antagonist) and were absent from TPH1KO females. CT effects were prominent at oestrus but absent at prooestrus. The number of EC cells containing immunohistochemically demonstrable serotonin (5-HT) was 30% greater in female mice during oestrus than during prooestrus or in males. We conclude that CT inhibits CMMCs via release of mucosal 5-HT, which activates an inhibitory pathway involving 5-HT3 receptors. This effect is sex- and oestrous cycle-dependent and is probably due to an oestrous cycle-dependent change in the number of 5-HT-containing EC cells in the colonic mucosa.

Cause-specific neonatal deaths in rural Bangladesh, 1987-2005: levels, trends, and determinants

This paper reports on an analysis of neonatal mortality from communicable and non-communicable diseases in Bangladesh. The competing-risks model employed incorporated both observed and unobserved heterogeneity and allowed the two heterogeneity terms to be correlated. The data used came from the Health and Demographic Surveillance System, Matlab. The results confirm the conclusions of previous studies about the levels, trends, and causes of neonatal death in the Matlab area: the education of the mother helps protect her children from death from both communicable and non-communicable diseases; the children of a father in a low-status occupation are particularly vulnerable to death from communicable diseases; and children born to mothers aged less than 20 face a particularly high risk of dying from a non-communicable disease. The risks of dying from a communicable disease and from a non-communicable disease were both found to fall significantly as the distance to the nearest health centre decreased.

Non-specific sex-differential effect of DTP vaccination may partially explain the excess girl child mortality in Ballabgarh, India

OBJECTIVE

To test the hypothesis that a gender differential exists in the effect on child mortality of BCG, DTP, measles vaccine as administered under programme conditions in Ballabgarh HDSS area.

METHODS

All live births in 28 villages of Ballabgarh block in North India from 2006 to 2011 were followed until 31 December 2011 or 36 months of age whichever was earlier. The period of analysis was divided into four time periods based on eligibility for vaccines under the national immunisation schedule (BCG for tuberculosis, primary and booster doses of diphtheria-tetanus-pertussis and measles). Cox proportional hazards regression was used to assess the association between sex and risk of mortality by vaccination status using age as the timescale in survival analysis and adjusting for wealth index, access to health care, the presence of a health facility in the village, parental education, type of family, birth order of the child and year of birth.

RESULTS

702 deaths (332 boys and 370 girls) occurred among 12,142 children in the cohort in the 3 years of follow-up giving a cumulative mortality rate of 57.5 per 1000 live births with 35% excess girl child mortality. Age at vaccination for the four vaccines did not differ by sex. There was significant excess mortality among girls after immunisation with DTP, for both primary (HR 1.65; 95% CI:1.17-2.32) and DTPb (2.21; 1.24-3.93) vaccinations. No significant excess morality among girls was noted after exposure to BCG 1.06 (0.67-1.67) or measles 1.34 (0.85-2.12) vaccine.

CONCLUSION

This study supports the contention that DTP vaccination is partially responsible for higher mortality among girls in this study population.

Family Planning and Women’s and Children’s Health: Long-Term Consequences of an Outreach Program in Matlab, Bangladesh

We analyze the impact of an experimental maternal and child health and family planning program that was established in Matlab, Bangladesh, in 1977. Village data from 1974, 1982, and 1996 suggest that program villages experienced a decline in fertility of about 17 %. Household data from 1996 confirm that this decline in “surviving fertility” persisted for nearly two decades. Women in program villages also experienced other benefits: increased birth spacing, lower child mortality, improved health status, and greater use of preventive health inputs. Some benefits also diffused beyond the boundaries of the program villages into neighboring comparison villages. These effects are robust to the inclusion of individual, household, and community characteristics. We conclude that the benefits of this reproductive and child health program in rural Bangladesh have many dimensions extending well beyond fertility reduction, which do not appear to dissipate rapidly after two decades.

Temporal trends and gender differentials in causes of childhood deaths at Ballabgarh, India - need for revisiting child survival strategies

BACKGROUND

Relating Information on causes of deaths to implementation of health interventions provides vital information for program planning and evaluation. This paper from Ballabgarh Health and Demographic Surveillance System (HDSS) site in north India looks at temporal trends and gender differentials in the causes of death among under-five children.

METHODS

Data on causes of death for 1972-74, 1982-84, 1992-94, 2002-04 were taken from existing HDSS publications and database. Physicians' assigned causes of death were based on narratives by lay health worker till 1994 and later by verbal autopsy. Cause Specific Mortality Fractions (CSMF) and Cause Specific Mortality Rates (CSMR) per 1000 live births were calculated for neonatal (<1 month) and childhood (1-59 months) period. Gender difference was estimated by calculating ratio of CSMR between girls and boys. Available information on coverage of childhood interventions in the HDSS was retrieved and compiled.

RESULTS

The CSMF of prematurity and sepsis was 32% and 17.6% during neonatal period in 2002-04. The share of infections in all childhood deaths decreased from 55.2% in 1972-74 to 43.6% in 2002-04. All major causes of mortality (malnutrition, diarrhea and acute lower respiratory infection) except injuries showed a steep decline among children and seem to have plateued in last decade. Most of disease specific public health interventions were launched in mid eighties. . Girls reported significantly higher mortality rates for prematurity (RR 1.52; 95% CI 1.01-2.29); diarrhea (2.29; 1.59 - 3.29), and malnutrition (3.37; 2.05 - 5.53).

CONCLUSIONS

The findings of the study point out to the need to move away from disease-specific to a comprehensive approach and to address gender inequity in child survival through socio-behavioural approaches.

Effect of parent's death on child survival in rural Bangladesh: a cohort study

BACKGROUND

The effect of a parent's death on the survival of the children has been assessed in only a few studies. We therefore investigated the effect of the death of the mother or father on the survival of the child up to age 10 years in rural Bangladesh.

METHODS

We used data from population surveillance during 1982-2005 in Matlab, Bangladesh. We used Kaplan-Meier and Poisson regression analyses to compute the cumulative probabilities of survival and rates of age-specific death up to age 10 years, according to the survival status of the mother or father during that period.

FINDINGS

There were 144 861 livebirths, and 14 868 children died by 10 years of age. The cumulative probability of survival to age 10 years was 24% in children whose mothers died (n=1385) before their tenth birthday, compared with 89% in those whose mothers remained alive (n=143 473). The greatest effect was noted in children aged 2-5 months whose mothers had died (rate ratio 25.05, 95% CI 18.57-33.81). The effect of the father's death (n=2691) on cumulative probability of survival of the child up to 10 years of age was negligible. Age-specific death rates did not differ in children whose fathers died compared with children whose fathers were alive.

INTERPRETATION

The devastating effects of the mother's death on the survival of the child were most probably due to the abrupt cessation of breastfeeding, but the persistence of the effects up to 10 years of age suggest that the absence of maternal care might be a crucial factor.

FUNDING

US Agency for International Development, UK Department for International Development, Research Program Consortium, and National Institutes of Health Fogarty International Center.

Can anthropometry measure gender discrimination? An analysis using WHO standards to assess the growth of Bangladeshi children

Objective

To examine the potential of anthropometry as a tool to measure gender discrimination, with particular attention to the WHO growth standards.

Design

Surveillance data collected from 1990 to 1999 were analysed. Height-for-age Z-scores were calculated using three norms: the WHO standards, the 1978 National Center for Health Statistics (NCHS) reference and the 1990 British growth reference (UK90).

Setting

Bangladesh.

Subjects

Boys and girls aged 6–59 months (n 504 358).

Results

The three sets of growth curves provided conflicting pictures of the relative growth of girls and boys by age and over time. Conclusions on sex differences in growth depended also on the method used to analyse the curves, be it according to the shape or the relative position of the sex-specific curves. The shapes of the WHO-generated curves uniquely implied that Bangladeshi girls faltered faster or caught up slower than boys throughout their pre-school years, a finding consistent with the literature. In contrast, analysis of the relative position of the curves suggested that girls had higher WHO Z-scores than boys below 24 months of age.

Conclusion

Further research is needed to help establish whether and how the WHO international standards can measure gender discrimination in practice, which continues to be a serious problem in many parts of the world.

The burden of unintentional injuries among the under-five population in South Asia

BACKGROUND

Childhood injuries are a growing global concern, one that falls disproportionately on developing countries where public health systems are least prepared to address this problem.

AIM

This study assesses the impact of childhood injuries in the developing region of South Asia in order to set forth an agenda for improving child health in that region.

METHODS

A systematic review was conducted for literature with quantitative data on unintentional injuries in children 0-4 years of age published between 1980 and 2007. The information was collated to estimate the mean, weighted mean and mortality rate for each type of injury. The rates were then applied to the 2000 UN projected population to estimate the number of childhood deaths due to unintentional injuries.

RESULTS

Unintentional injuries are estimated to cause 389,000 annual child deaths in South Asia. This premature mortality results in the annual loss of 74 healthy life years (HeaLYs) per 1000 population.

CONCLUSION

The current burden of childhood injuries in South Asia is unacceptably high and calls for efforts from all sectors involved in research, policy and funding to not only assess the impact of childhood injuries but to strengthen the health systems to stem this preventable loss of healthy life.

Has the 2005 measles mortality reduction goal been achieved? A natural history modelling study

BACKGROUND

In 2002, the UN General Assembly Special Session on Children adopted a goal to reduce deaths owing to measles by half by the end of 2005, compared with 1999 estimates. We describe efforts and progress made towards this goal.

METHODS

We assessed trends in immunisation against measles on the basis of national implementation of the WHO/UNICEF comprehensive strategy for measles mortality reduction, and the provision of a second opportunity for measles immunisation. We used a natural history model to evaluate trends in mortality due to measles.

RESULTS

Between 1999 and 2005, according to our model mortality owing to measles was reduced by 60%, from an estimated 873,000 deaths (uncertainty bounds 634,000-1,140,000) in 1999 to 345,000 deaths (247,000-458,000) in 2005. The largest percentage reduction in estimated measles mortality during this period was in the western Pacific region (81%), followed by Africa (75%) and the eastern Mediterranean region (62%). Africa achieved the largest total reduction, contributing 72% of the global reduction in measles mortality. Nearly 7.5 million deaths from measles were prevented through immunisation between 1999 and 2005, with supplemental immunisation activities and improved routine immunisation accounting for 2.3 million of these prevented deaths.

INTERPRETATION

The achievement of the 2005 global measles mortality reduction goal is evidence of what can be accomplished for child survival in countries with high childhood mortality when safe, cost-effective, and affordable interventions are backed by country-level political commitment and an effective international partnership.

The effect of maternal education on gender bias in care-seeking for common childhood illnesses

This paper assessed gender bias within hospitalisation rates to ascertain whether differential care-seeking practices significantly contribute to excess female mortality. It then examined the impact of socio-economic factors, particularly maternal education and economic status, on gender bias. The results find both the clear and significant impact of gender on hospitalisation rates, as well as the simultaneous inability of rising education and economic status to alleviate this bias. A secondary analysis was conducted within a uniquely large and ongoing randomised control trial that sought to measure the impact of Zinc supplementation on hospitalisations and deaths in low-income communities in New Delhi, India. During the course of the study, 85,633 children were enrolled and monitored over one year of follow-up. Of the 430 deaths that occurred, 230 were female (0.57% of total females), while 200 were male (0.43% of all males). Despite this higher mortality amongst females (p<0.02), girls were hospitalised far less frequently than boys. Of the 4418 children who were hospitalised at least once, 2854 (64.6%) were males and only 1564 (35.4%) were females, indicating a significantly lower rate of care-seeking for females (p<0.00). Curiously, our results show that gender bias is highest amongst highly educated mothers, and decreases steadily for children of mothers with a middle school education, a primary school education, and is lowest amongst mothers with no formal education. Put differently, female children of mothers with no formal education were significantly more likely to be hospitalised than children of mothers with several years of formal education, even after adjusting for all other factors. Economic status was not found to affect the association of gender and hospitalisation, though overall odds of hospitalisation rose with increasing economic status. Paternal education was found not to be significantly related to hospitalisation.

Visceral leishmaniasis: consequences to women in a Bangladeshi community

Visceral leishmaniasis (VL) or kala-azar (KA) affects the rural poor, causing significant morbidity and mortality. We examined the epidemiological and social impact of KA in an affected village in Bangladesh. A population-based survey of the village residents showed a case fatality rate of 14.7% among females and 5.3% among males. Before initiation of the study, female patients were ill longer than males before they received treatment. Future work needs to focus on understanding the implications of KA on women and to develop sustainable strategies for appropriate and timely access to treatment.

Conclusions about differences in linear growth between Bangladeshi boys and girls depend on the growth reference used

OBJECTIVE

To examine sex differences in height-for-age z-scores and the percentage stunting among Bangladeshi children estimated using three growth references.

DESIGN, SETTING AND SUBJECTS

Data collected between 1990 and 1999 by Helen Keller International's nutritional surveillance system in rural Bangladesh were analyzed for 504 358 children aged 6-59 months. Height-for-age z-scores were estimated using the 1977 NCHS, 2000 CDC and 1990 British growth references.

RESULTS

The shape of the growth curves for Bangladeshi boys and girls, and their positions relative to one another, depend on which of the three growth references is used. At 6 months of age the British reference showed no sex difference whereas the NCHS and CDC showed girls to have higher average z-scores than boys by 0.14 and 0.28 s.d., respectively. While all references showed a faster deterioration of girls' z-scores from 6 to 24 months, the magnitude and direction of the sex differences, and how they changed with age, were different. There was greater disagreement about girls' z-scores than boys. Discontinuities at 24 months in the NCHS and CDC produced jagged curves whereas the British curves were smooth.

CONCLUSIONS

The assessment of sex differences in linear growth depends on the growth reference used. Reasons for the different results need to be determined and may aid the final development of the new WHO international growth reference and the guidelines for its use. The findings suggest that anthropometry as a tool to explore the effects of societal gender inequality must be used with caution.

Predicting the distribution of under-five deaths by cause in countries without adequate vital registration systems

BACKGROUND

The absence of complete vital registration and atypical nature of the locations where epidemiological studies of cause of death in children are conducted make it difficult to know the true distribution of child deaths by cause in developing countries. A credible method is needed for generating valid estimates of this distribution for countries without adequate vital registration systems.

METHODS

A systematic review was undertaken of all studies published since 1980 reporting under-5 mortality by cause. Causes of death were standardized across studies, and information was collected on the characteristics of each study and its population. A meta-regression model was used to relate these characteristics to the various proportional mortality outcomes, and predict the distribution in national populations of known characteristics. In all, 46 studies met the inclusion criteria.

RESULTS

Proportional mortality outcomes were significantly associated with region, mortality level, and exposure to malaria; coverage of measles vaccination, safe delivery care, and safe water; study year, age of children under surveillance, and method used to establish definitive cause of death. In sub-Saharan Africa and in South Asia, the predicted distribution of deaths by cause was: pneumonia (23% and 23%), malaria (24% and <1%), diarrhoea (22% and 23%), 'neonatal and other' (29% and 52%), measles (2% and 1%).

CONCLUSIONS

For countries without adequate vital registration, it is possible to estimate the proportional distribution of child deaths by cause by exploiting systematic associations between this distribution and the characteristics of the populations in which it has been studied, controlling for design features of the studies themselves.

Prevalence and correlates of diarrhea

OBJECTIVE

The present study aimed to estimate the prevalence of acute diarrhea and its correlates in remote rural villages of south Pakistan.

METHODS

The authors selected 1878 children less than 3 years of age through stratified random sampling from 64 villages having the number of children enrolled proportionate to the size of each village, in rural Sindh, Pakistan. Trained field workers completed child physical measurements and maternal interviews.

RESULTS

Among the children examined, 961 (51%) had diarrhea in the preceding 14 days prior to the date of survey. The prevalence of diarrhea was marginally higher among girls than boys (53% versus 49%, odds ratio 1.18, 95% CI 0.98, 1.41). The factors related with higher prevalence of diarrhea were lack of education of mother, lack of exclusive breast feeding, breast feeding for less than one year, roundworm infestation, low weight-for height, night blindness, female sex and number of older siblings more than 2 in the family.

CONCLUSION

This study demonstrated that the acute diarrhea is major problem among children in rural Pakistan. Appropriate intervention programmes should be formulated focused on identified risk factors.

Lean body mass in preschool aged urban children in India: gender difference

OBJECTIVE

To estimate lean body mass (LBM) in preschool aged boys and girls in India and explore gender difference.

DESIGN

Crossectional.

SETTING

Immunization clinic of a charitable Government General Hospital in Kolkata, India.

SUBJECTS

Two-hundred and forty-five children (147 boys and 98 girls) aged 1-5 y from among the urban poor were admitted in the study between July 1999 and December 2000. Children with acute or chronic illness or congenital malformation were excluded.

METHOD

Length/height to the nearest 0.1 cm, weight to the nearest 10 g and total body resistance using multifrequency bioelectrical (Xitron 4000B) impedance analyzer (BIA) at 50 kHz were measured. Their nutritional status was compared with National Center for Health Statistics (NCHS) median data and lean body mass (LBM) was calculated using anthropometry and BIA equations. The groups were compared using analysis of variance and multiple linear regression.

RESULTS

Girls were more stunted (P<0.001) and underweight (P<0.047), while the degree of wasting was similar. Mean LBM percentage was higher in boys compared with girls by anthropometry (P<0.001) and BIA (P<0.005), which persisted after adjusting for age. With increasing age, LBM percentage declined in girls (P<0.02) in contrast to reference girls, in whom it increased. In boys LBM percentage increased with age as is in reference boys.

CONCLUSIONS

In addition to the girls being more stunted and underweight, LBM% decreased in girls with increasing age but steadily increased in boys, suggesting hidden deprivation of female children.

Prevalence and correlates of stunting among children in rural Pakistan

BACKGROUND

Protein-energy malnutrition remains an important underlying cause of death among preschool children in Pakistan. The present study aimed to estimate the prevalence of stunting and its correlates and to explore the role of sex bias in remote rural villages of south Pakistan.

METHODS

We selected 1878 children less than 3 years of age through stratified random sampling from 64 villages having the number of children enrolled proportionate to the size of each village, in rural Sindh, Pakistan. Trained investigators completed child physical measurements and a maternal interview. The Z-scores for the distribution of height-for-age (stunting) and weight-for-height (wasting) were estimated relative to those of the National Center for Health Statistics/Center for Disease Control (NCHS/CDC) reference population.

RESULTS

A total of 483 (26%) of the 1878 children were wasted, 977 (55%) were stunted and 259 (15%) were both wasted and stunted. Mothers who were illiterate were more likely to have children who were stunted (odds ratio (OR) = 1.27, 95% confidence interval (CI) 1.11-1.61). Fathers who earn less than Rs. 1000 (US $20) per month (OR = 1.35, 95% CI 1.12-1.66) were more likely to have children who were stunted. Children living in an overcrowded house were more likely to be stunted (OR = 1.44, 95% CI 1.18-1.75). Male children compared to females were equally likely to be stunted (57 vs 55%, OR 1.03, 95% CI 0.86-1.25).

CONCLUSIONS

In this region of lower Sindh, stunting is more common than wasting. Female illiteracy, poor household income and overcrowding are important risk factors for stunting. The prevalent belief that in rural Pakistan, parents pay attention to feeding male children at the cost of female children is not proven by these data.

Determinants of mortality among children in the urban slums of Dhaka city, Bangladesh

The growing slum population in the developing world is an increasing challenge for local health authorities. Little is known of the patterns of disease occurrence including treatment types offered in this population. The paper describes reported child mortality and its determinants, including the main diseases affecting children and treatments, in the slum population of Dhaka city, Bangladesh. 1500 households in three slum communities were included in a cross-sectional survey. Reported death rates in the households per 1000 children (0-107 months) within the last year from the interview were 20.5 for boys and 27.0 for girls. More girls than boys died in infancy (age < 12 months). The most frequent reported causes of deaths were tetanus in infancy and diarrhoea among children aged < or = 12 months. Vaccination coverage (DPT, polio, measles and BCG) was 73% for children < 3 years of age. The results showed that gender difference in mortality may have been influenced by the patterns of treatment received during sickness and the choice of treatment was determined by the financial ability of the households. Household income, children's vaccinations, TT immunization of mothers and personal cleanliness appeared to be significantly associated with child mortality. Despite the relatively high vaccination coverage for this population, child mortality remained alarmingly high, indicating that socioeconomic and environmental conditions must be improved to substantially reduce morbidity and mortality in this population.

Promoting equity in health

There is evidence that widening income gaps are a global phenomenon; that in many advanced industrialised countries unemployment rates are rising; that globalisation of the world economy has led to several countries becoming marginalised with a concomitant increase in poverty; and that the absolute number of poor has steadily increased over the last decade. All of these phenomena emphasise the need to focus on equity as a global concern.

Gender and age differentials in risk factors for childhood malnutrition in Bangladesh

A case-control study of risk factors of clinical marasmus was undertaken to determine which factors differed according to gender and age groups. Case patients were children whose mid-upper arm circumference measured less than 110 mm and control subjects were children matched for age and sex with an arm circumference more than 120 mm. Between June 1988 and June 1989, 164 such pairs of children aged 1 to 4 years were studied. The effect of various demographic, socioeconomic, environmental, and health factors was investigated in a multivariate analysis using conditional logistic regression. Results showed an increased risk of marasmus among children with siblings under 5 years old. This increased risk was observed irrespective of gender or age. Children who consumed formula foods also had an increased risk of marasmus. Again, this elevated risk was maintained for boys and girls. Overall, higher maternal education was associated with a reduced risk of marasmus; however, this was only statistically significant for boys and for children 18 months or older. Religion was also associated with marasmus but only in older children (> or = 18 months). These results indicate that better strategic planning is necessary to formulate effective interventions to reduce severe malnutrition, particularly in societies where strong age- and sex-preferential behavior exists.