bluuebunny/crossref_metadata_2025_split huggingface dataset:
Estimating voluntary and involuntary childlessness in the developing countries
Authors: Poston Dudley L. , Kramer Kathryn B. , Trent Katherine , Yu Mei-Yu 
Published: July 2008

SummaryThis paper examines rates of marital childlessness in the developing countries of the world and separates them into voluntary, involuntary and related components through a decision-tree model based on fecundity, contraceptive behaviour, pregnancy status, age, years married, and other variables. The principal data are taken from World Fertility Surveys. The conclusion is reached that virtually all of the permanent childlessness in the developing countries examined is involuntary.
Mortality of an urban population by period of residence in a rapidly industrialized city
Authors: Masaki Motofumi , Suzuki Tsuguyoshi 
Published: July 2008

SummaryMortality differentials among urban residents who were classified by period of residence in a rapidly industrialized city were analysed for those aged 20 and over dying between April 1974 and March 1978. The highest mortality in the male population appeared in the group with under 5 years of residence, and this was attributed to the high age-specific death rates at age 50 and over. In females, a mortality excess conspicuous in those under age 50 was observed in the group with over 20 years of residence. Age-adjusted death rates by leading causes of death differed among the groups by period of residence; the rates from malignant neoplasms and senility for the population with under 5 years of residence were greater in males, but smaller in females than those of the total population. The mortality for the male population with under 5 years of residence was considered to be related to the health of the aged when they migrated.
Personality and IQ score variation in a Cambridge undergraduate sample
Authors: Mascie-Taylor C. G. N. , Maclarnon A. M. , Lanigan P. M. 
Published: July 2008

SummaryThis study, using an undergraduate sample, examines the relationship between ten independent variables and their interactions, on two IQ components and sixteen personality factors. There was a highly significant relationship between both IQ components and subject studied at university, and between the verbal IQ component and birth order. A relationship between smoking habit and personality was also found.
Gender-related differences in the impact of tropical diseases on women: what do we know?
Authors: Vlassoff Carol , Bonilla Elssy 
Published: July 2008

SummaryThis paper explores the importance of gender differences in the impact of tropical diseases on women. Malaria and schistosomiasis are used as examples but most of the observations also apply to other diseases endemic to developing countries. The distinction between sex and gender is discussed and evidence of sex and gender differences in the determinants and consequences of malaria and schistosomiasis, particularly their economic, social and personal dimensions, is reviewed. Issues on which research and intervention studies are needed are identified.
Determinants of racial fertility differentials in some urban areas of South Africa
Authors: Chimere-Dan Orieji 
Published: July 2008

SummaryResults of a survey of some urban areas in the Pretoria–Witwatersrand–Vereenining region show differential impacts of proximate and socioeconomic factors on the fertility of urban blacks and whites. Timing of starting and ending of childbearing and the reproductive behaviour of women who have never been married account for the major differences in fertility levels. White women confine their childbearing career to the 20–39 age range, while black women utilise the entire 15–49 age range. The fertility level is quite high among black women who have never been married (in contrast to never married white women). With the exception of breast-feeding, racial patterns in other proximate determinants of fertility do not suggest the observed racial differentials in fertility.
The intelligence of American children is still rising
Authors: Lynn Richard , Pagliari Claudia 
Published: July 2008

SummaryChildren's intelligence increased in the United States by approxi-mately 3 IQ points per decade over the period 1932–78. New evidence shows that these increases have been sustained during the last 20 years. Two recent studies indicate that the rates of increase for 1972–89 and 1978–89 were 3·3 and 3·5 IQ points per decade respectively.
Aspects of neonatal death in St Kilda, 1830–1930
Authors: Clegg E. J. , Cross J. F. 
Published: July 2008

SummaryNeonatal death (mainly due to tetanus) was common in St Kilda until 1891. Two aspects of this phenomenon are studied; factors which pre-dicted death, and the impact of neonatal death on family building. Maternal age appeared to be a predictive factor for death of the first child, but only in children of high birth order were other factors, particularly the number of previous neonatal deaths, important. The first birth interval appeared to be determined mainly by the date of the first birth, independent of neonatal mortality levels. For later intervals, the neonatal death of the previous child appeared to be the main determining factor.
Breast-feeding and child survival in Matlab, Bangladesh
Authors: Shahidullah M. 
Published: July 2008

SummaryThis study investigates the effect of both total and unsupplemented breast-feeding in conjunction with birth interval on early childhood mortality, using longitudinal data from Matlab, Bangladesh. A discrete hazard model approach shows that it is not the duration of total breast-feeding but the duration of unsupplemented breast-feeding which increases child survival. Unsupplemented breast-feeding appears as such a crucial determinant of early childhood mortality that its effect could not be substantially attenuated even when important demographic and socioeconomic factors were controlled. Each of the covariates—supplementation, previous birth interval and onset of a subsequent conception—has an independent influence on early childhood mortality.
The role of breast-feeding beyond postpartum amenorrhoea on the return of fertility in India: a life table and hazards model analysis
Authors: Nath Dilip C. , Land Kenneth C. , Singh Kaushalendra K. 
Published: July 2008

SummaryThis paper investigates the effects of continued breast-feeding after resumption of menses on fertility, using data from two retrospective surveys in India and single decrement life table and multivariate time-dependent hazards analyses. Breast-feeding even after the return of menses is found to be associated with longer birth intervals. The interaction of breast-feeding duration after resumption of menses and postpartum amenorrhoea has a significant effect on the risk of conception after return of menses.
Recent evidence on trends and differentials in Bangladesh fertility: an update
Authors: Amin R. , Ahmed A. , Chowdhury J. , Kabir M. , Hill R. 
Published: July 2008

SummaryA comparison of contraceptive and fertility data for 1985–91 with data for 1983 shows that fertility has continued to decline in Bangladesh, in all segments of society. The magnitude of decline varied according to educational level, region and urban–rural locality. The percentage decline in total marital fertility rate was somewhat higher among urban than rural residents; educated women showed greater declines than uneducated, increas-ing the overall educational differences in total fertility by 1991. Factors contributing to the recent decline in fertility are discussed.
Obstetrical outcome with increasing maternal age
Authors: Viegas O. A. C. , Leong W. P. , Ahmed S. , Ratnam S. S. 
Published: July 2008

SummaryA retrospective study of 21,442 Singaporean women who gave birth at the National University Hospital, Singapore, between January 1986 and November 1991 is used to assess the effects of increasing age on obstetric performance. The results show that reproduction after the age of 35 years in Singapore is associated with a higher incidence of antenatal complications such as hypertension and diabetes and a higher rate of obstetric intervention. However, given the current level of obstetric and neonatal care in Singapore, these adverse features do not prejudice the obstetric and neonatal outcomes.
Factors affecting desired family size in Bangladesh
Authors: Kabir M. , Amin Ruhul , Ahmed Ashraf Uddin , Chowdhury Jamir 
Published: July 2008

SummaryFactors affecting desired family size in rural Bangladesh are examined using data from contraceptive prevalence surveys conducted between 1983 and 1991. The analysis suggests that mothers having two sons and one daughter are more inclined to perceive their family as complete than those having three sons and no daughter. Logistic regression analysis indicates that important determinants of desire for more children are age of woman, current contraceptive use status, work status, and family planning worker's visit. The policy implications of these findings are discussed.
Subsistence ecology and carrying capacity in two Papua New Guinea populations
Authors: Ohtsuka Ryutaro 
Published: July 2008

SummaryThis article examines the mechanisms of subsistence adaptation of two Papua New Guinea populations, the Metroxylon sago-depending lowland Gidra and the taro-monoculture Mountain Ok, surviving in low population densities of 0·5 and 1·4 persons per km2. Observation of the groups' land use systems strongly suggests that their population densities have not been far below the carrying capacity, although the territory of each population is markedly heterogeneous. Both groups have maintained their sustainable food production not only for resource management but also for survival at a population level, either expanding their territory or changing the sustainable level in tandem with changes of subsistence system.
Unintended pregnancy and sex education in Chile: a behavioural model
Authors: Herold Joan M. , Thompson Nancy J. , Valenzuela Maria Solange , Morris Leo 
Published: July 2008

SummaryThis study analysed factors associated with unintended pregnancy among adolescent and young adult women in Santiago, Chile. Three variations of a behavioural model were developed. Logistic regression showed that the effect of sex education on unintended pregnancy works through the use of contraception. Other significant effects were found for variables reflecting socioeconomic status and a woman's acceptance of her sexuality. The results also suggested that labelling affects measurement of ‘unintended’ pregnancy.
Assortative mating in a Spanish population: effects of social factors and cohabitation time
Authors: Sánchez-Andrés A. , Mesa M. S. 
Published: July 2008

SummaryAssortative mating for 22 anthropometric and body composition characteristics and social indicators was studied in a Spanish sample of 114 married couples. Significant spousal similarity was found for occupation, educational level and number of siblings. Sex–age adjusted spouse correlations were significant for stature, ileospinal height, total arm length, and biacromial breadth. Spouse correlations were not altered after allowance for socioeconomic effects. When couples were grouped according to marriage duration, differences in mate correlations for fatness were detected, suggesting a cohabitational effect on spouse resemblance.
Ultradian behaviour cycles in a village community of Colombian Indians
Authors: Meier-Koll Alfred , Schardl Barbara 
Published: July 2008

SummaryThe daily activities observed in a Colombian village community of contemporary hunting and gathering people were analysed with respect to their time structure. Short term cycles of about 2 hours could be detected in both individual and common behavioural patterns. These behaviour cycles of individual group members appear to have been synchronised by social interaction. From temporal variations of individual activities a common ultradian time frame emerged.
Factors related to duration of postpartum amenorrhoea among USA women with prolonged lactation
Authors: Heinig M. Jane , Nommsen-Rivers Laurie A. , Peerson Janet M. , Dewey Kathryn G. 
Published: July 2008

SummaryDuration of postpartum amenorrhoea (PPA) was compared among women who breast-fed For ≥ 6 months (breast-feeding group) Or ≤ 3 Months (formula-feeding group) and was found to be significantly shorter among the latter. associations between maternal factors and duration of PPA were examined. within the formula-feeding group, the only variable associated with duration of PPA was duration of breast-feeding. among breast-feeding mothers who resumed menstruation after 3 months postpartum, duration of PPA was positively associated with parity and negatively associated with maternal body mass index (bmi) at 3 months postpartum. Among breastfeeding mothers who resumed menstruation after 6 months, duration of PPA was positively associated with parity, pregnancy weight gain, number of night feeds and milk volume at 6 months, and negatively associated with maternal age and bmi at 6 months postpartum. These results indicate that maternal anthropometric status is related to duration of PPA, even in a relatively well-nourished population of lactating women.
Fertility decline in Tanzania
Authors: Mturi Akim J. , Hinde P. R. Andrew 
Published: July 2008

SummaryAccording to the 1991/92 Tanzania Demographic and Health Survey, a Tanzanian woman has, on average, 6·1 births before she reaches age 50, a decline of about one birth per woman since the early 1980s. The major proximate determinant of fertility is universal and prolonged breastfeeding. An analysis of the social and demographic correlates of fertility shows that infant and child mortality, level of education and age at first marriage are among the factors which significantly influence fertility in Tanzania.
Variability in behavioural risk factors for heart disease in an Australian Aboriginal community
Authors: Hogg Robert S. 
Published: July 2008

SummaryThe variability of three behavioural risk factors for heart disease—heavy alcohol and tobacco consumption and physical inactivity—was assessed in an Australian Aboriginal community, where heart disease death rates were high. Prevalence levels were assessed by comparison with those experienced by all adult Australians and by evaluating whether Aboriginal rates were influenced by underlying sociodemographic conditions. Relative risk ratios, odds ratios and logistic regression analysis were used.A total of 159 males and 114 females participated. Compared to all Australians, Aborigines are significantly more likely to drink five or more drinks on a drinking day, to be current smokers, and not to participate in vigorous exercise. In the Aboriginal community, univariate analysis indicates that: the odds of being a heavy drinker are significantly higher for those in unsatisfactory health; odds of being a current smoker are significantly higher for those in unsatisfactory health or unemployed; odds of not participating in vigorous exercise are significantly higher for those in unsatisfactory health, unemployed or without secondary education. Multivariate analysis shows that risk of being a heavy drinker is independently associated with sex, age, and health status; risk of being a current smoker is associated with health and employment status. The risk of not participating in vigorous exercise is significantly related to all sociodemographic variables examined. Reasons for these associations are discussed.
Attenuation of nursing-related ovarian suppression and high fertility in well-nourished, intensively breast-feeding Amele women of lowland Papua New Guinea
Authors: Worthman Carol M. , Jenkins Carol L. , Stallings Joy F. , Lai Daina 
Published: July 2008

SummaryIntense, sustained nursing lengthens inter-birth intervals and is causally linked with low natural fertility. However, in traditional settings, the effects of such nursing on fertility are difficult to disentangle from those of nutrition. Results from an prospective, direct observational study of reproductive function in well-nourished Amele women who nurse intensively and persistently but who also have high fertility are here presented. Endocrine measures show that ovarian activity resumes by median 11·0 months postpartum. Median duration of postpartum amenorrhoea is 11·3 months, time to next conception is 19·0 months, and the inter-birth interval is 28·0 months. Average life time fertility is 6·8. High fertility in Amele women is due both to refractoriness of reproductive function to suckling stimuli, and to maintenance of equivalent age-specific fertility rates across the reproductive life span.
Does women's literacy affect desired fertility and contraceptive use in rural–urban Pakistan?
Authors: Zaki Khalida P. , Johnson Nan E. 
Published: July 2008

SummaryThe 1984–85 Pakistan Contraceptive Prevalence Survey showed that urban wives had more than twice the literacy rate of rural wives. The present study explored the relationship of the rural–urban gap in female literacy to differences in contraceptive use. In rural areas, literacy did not increase women's perceptions of having reached a ‘sufficient’ number of living children, although the opposite was true for urban areas. Yet rural women with an ‘insufficient’ number of living children were more likely to use contraception if they were literate, as did their urban counterparts. Thus, raising the literacy rate in rural Pakistan would not narrow the rural–urban gap in contraception to cease childbearing but would narrow the rural–urban gap in contraception used to space wanted births further apart. Recommendations for government policy are made.
Socioeconomic factors affecting marriage, divorce and birth rates in a Japanese population
Authors: Uchida Eiichi , Araki Shunichi , Murata Katsuyuki 
Published: July 2008

SummaryThe effects of low income, urbanisation and young age population on age-adjusted rates of first marriage, divorce and live birth among the Japanese population in 46 prefectures were analysed by stepwise regression for 1970 and for 1975. During this period, Japanese society experienced a drastic change from long-lasting economic growth to serious recession in 1973. In both 1970 and 1975, the first marriage rate for females was inversely related to low income and the divorce rates for both males and females were positively related to low income. The live birth rate was significantly related to low income, urbanisation and young age population only in 1975. The first marriage rate for females and the divorce rates for both sexes increased significantly but the first marriage rate for males and live birth rate significantly decreased between 1970 and 1975. These findings suggest that low income was the essential factor affecting first marriage for females and divorce for males and females.
Socioeconomic status: the prime indicator of premature death in Australia
Authors: Lawson James S. , Black Deborah 
Published: July 2008

SummaryThe link between socioeconomic status and health has long been recognised. This study of deaths among Australian men aged 15–59 years demonstrates that during the 20-year period, 1966–86 the number of premature deaths was dramatically reduced among all socioeconomic groups, primarily as a result of falls in death rates due to heart disease, stroke and trauma. However, the marked differences in death rates according to social class remain, to the extent that if men of all social classes had the same mortality experiences as professional and technical workers the overall death rates for Australian men would be reduced by 60%. Socioeconomic status is the most important indicator of health status among Australians.
Impact of migration, environment and socioeconomic conditions on the physique of Sikhs
Authors: Singh L. P. , Harrison G. A. 
Published: July 2008

SummaryThis study is based on a cross-sectional sample of 459 Sikh adults, male and female, from three castes representing three levels of socioeconomic affluence. The sedentes group stayed all their lives in the native state of Punjab, India; the migrant group completed their active physical growth in the Punjab and left for the UK at around 20 years of age. The pattern of stature, weight, BMI and skinfolds in both groups reflects their level of socioeconomic affluence in their native Punjab. In the migrants, the caste differences in the mass measures largely disappear, but the differences in the skeletal dimensions remain. Both male and female migrants are heavier than their sedente counterparts and the male migrants have substantially higher amounts of subcutaneous fat. The change in weight, BMI and skinfolds in the migrants is inversely proportional to the original values of these variables in the native settings. Male sedentes and migrants are not statistically significantly different in stature, but the female migrants are taller than their sedente peers in all three castes. In a multivariate analysis, caste remains the most significant factor in the skeletal variables; in the mass characters, both caste and migration are statistically significant factors; age explains very little of the variation.
Maternal education and family income as determinants of severe disease following acute diarrhoea in children: a case control study
Authors: Mahalanabis Dilip , Faruque Abu S. G. , Islam Asma , Hoque Syed S. 
Published: July 2008

SummaryIn a case-control study among the urban poor of Dhaka, Bangladesh, the association of maternal education and family income with severity of disease due to diarrhoea in children was examined. After adjusting for family income, 7 or more years of school education was associated with 54% reduced risk of severe disease as indicated by the presence of dehydration. Income in the uppermost quartile of this population, independently of maternal education, was associated with 41% reduced risk of severe disease compared to the lowest quartile. In the logistic regression model the effect of maternal education remained high after adjustment for several confounders. Based on the concept that socioeconomic variables operate through a set of proximate variables it is contended that maternal education, independently of economic power, through its impact on disease from acute diarrhoea, favourably influences child survival.
Variations in familial neonatal mortality risks in four countries
Authors: Curtis Siân L. , Steele Fiona 
Published: July 2008

SummaryThis paper investigates variations in the strength and structure of familial association in neonatal mortality risks in four populations; Bolivia, Kenya, Peru, and Tanzania. Exploratory analyses of the structure of the familial association are presented for each population. Random effects logistic models are then used to estimate the strength of familial association in neonatal mortality risks using a standard set of control variables. The results suggest that the strength of familial association in neonatal mortality risks is quite similar in these four populations which would be consistent with a biological explanation for the association. However, some differences were found, particularly in the form of the association in Peru, which may suggest at least a small role of other factors.
Fitness of professionals and skilled workers in Poland
Authors: Rogucka Elzbieta , Welon Zygmunt 
Published: July 2008

SummarySimple measures of the biological fitness of adult men aged 25–65 years, inhabitants of the city of Wroclaw, Poland, were studied in two well-defined social groups: professionals and skilled workers. It was found that the manual workers, compared to professionals, have higher systolic and diastolic blood pressure, lower relative vital capacity, inferior flexibility of spine, poorer eye-hand co-ordination, and poorer hearing acuity. These social differences appear consistently at each age level between 25 and 65 years and tend to increase with age to the disadvantage of skilled workers.