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Mothers and Children. 1985 Nov-Dec; 5(1):5, 7.Currently standards from industrialized countries are used to assess the growth patterns of breastfed infants in developing countries. Infant growth faltering is interpreted as an indicator of insufficient lactational capacity on the mother's part. 2 recent articles suggest the need for a critical reappraisal of current growth standards and their use for evaluating the adequacy of infant feeding practices. The most commonly used standards to evaluate infant growth are derived from the US National Center for Health Statistics based on anthropometric data collected in the US population 3-month intervals up to the age of 3. During this period, infant feeding practices varied greatly. Many babies were bottle-fed and given supplemental feedings early in life. No large sample of exclusively breastfed infants has been studied from birth on, and thus a standard for breastfed infants is not available. A study of fully breastfed infants was done in England and suggests that there are differences in growth rates. Among a population of 48 exclusively breastfed boys and girls, for the 1st 3 to 4 months of life, growth of breastfed infants was greater than National Center for Health Statistics Standards, while after 4 months growth velocity decelerated more quickly than the standard. The growth of infants studied in Kenya, New Guinea and the Gambia appears to falter at 2-3 months of age using the NCHS standard. Findings suggest that current FAO/WHO recommended energy intakes may be excessive. Recent studies in the US support this assertion. The adequacy of the milk production for the infants in this US study done in Texas was illustrated by their growth rates. Length for age percentiles were higher than the NCHS standards throughout the study though at birth they did not differ significantly. 1 reason these breastfed infants were able to maintain growth despite less than recommended energy intakes is that the ratio of weight gain/100 calories of milk consumed was 10-30% higher among the breastfed infants compared to formula fed infants, suggesting a more efficient use of breastmilk than formula. There is a need for studies of exclusively breastfed infants with larger samples to determine what growth pattern should be considered the norm.
In: Population prospects in developing countries: structure and dynamics, edited by Atsushi Otomo, Haruo Sagaza, and Yasuko Hayase. Tokyo, Japan, Institute of Developing Economies, 1985. 115-40, 329. (I.D.E. Statistical Data Series No. 46)This paper reviews the various methods of projecting future numbers of households, summarizes prospective major trends in the numbers of households and the average household size among the developing countries prepared by the UN Population Division in 1981, and analyzes the size structure of households among the developing countries in contrast to the developed nations. The purpose of this analysis is to prepare household projections by size (average number of persons in a household) for the developing countries. The headship rate method is now the most widely used procedure for projecting households. The headship rate denotes a ratio of the number of heads of households, classified by sex, age, and other demographic characteristics such as marital status, to the corresponding classes of population. When population projections have become available by sex, age, and other characteristics, the projected number of households is obtained by adding up over all classes the product of projected population and projected headship rate. In addition to the headship rate method, this paper also reviews other approaches, namely, simple household-to-population ratio method; life-table method, namely the Brown-Glass-Davidson models; vital statistics method by Illing; and projections by simulation. Experience indicates that the effect of changes in population by sex and age is usually the most important determinant of the change in the number of households and it would be wasteful if the household projections failed to employ readily population projections. Future changes in the number of households among the developing countries are very significant. According to the 1981 UN projections, the future increase in the number of households both in the developed and developing countries will far exceed that in population. In 1975-80 the annual average growth rate of households was 2.89% for the developing countries as a whole while that for population was 2.08%. In 1980-85, the growth rate for households for the developing countries will be 2.99%, while that for population will be 2.04%. In 1995-2000 the figure for household growth will be 2.89%, whereas that for population will be 1.77%. The past trend of fertility is the most important factor for the reduction of household size and it would continuously be the central factor. The increasing headship rates will be observed among the sex-age groups, except the young female groups, as a result of increasing nuclearization in households.
New York, United Nations, 1984. 108 p. (Population Studies, No. 85; ST/ESA/SER.A/85)The 3 parts of this report on world, regional, and international developments in the field of population, present a summary of levels, trends, and prospects in mortality, fertility, nuptiality, international migration, population growth, age structure, and urbanization; consider some important issues in the interrelationships between economic, social, and demographic variables, with special emphasis on the problems of food supply and employment; and deal with the policies and perceptions of governments on population matters. The 1st part of the report is based primarily on data compiled by the UN Population Division. The 2nd part is based on information provided by the Food and Agriculture Organization of the UN (FAO) and the International Labor Organization (ILO), as well as that compiled by the Population Division. The final part is based on information in the policy data bank maintained by the Population Division, including responses to the UN Fourth Population Inquiry among Governments. In 1975-80 the expectation of life at birth for the world was estimated at 57.2 years for both sexes combined. The corresponding figure for the developed and developing regions was 71.9 and 54.7 years, respectively. In 1975-80 the birthrate of the world was estimated at 28.9/1000 population and the gross reproduction rate was 1.91. These figures reflect considerable decline from the levels attained 25 years earlier: a crude birthrate of 38/1000 population and a gross reproduction rate of 2.44. World population grew from 2504 million in 1950 to 4453 million in 1983. Of the additional 1949 million people, 1645 million, or 84%, accrued to the less developed countries. The impact of population growth on economic development and social progress is not well understood. The governments of some developing countries still officially welcome a rapid rate of population growth. Many other governments see cause for concern in the need for the large increases in social expenditure, particularly for health and education, that accompany a young and growing population. Planners are concerned that the rapidly growing supply of labor, compounded by a trend toward rapid urbanization, may exceed that which the job market is likely to absorb. In the developed regions the prospect of a declining, or an aging, population is also cause for apprehension. There is a dearth of knowledge as to the impact of policies for altering the consequences of these trends. Many policies have been tried, in both developed and developing countries, to influence population growth and distribution, but the consequences of such policies have been difficult to assess. Frequently this problem arises because their primary objectives are not demographic in character.