scholarly journals Studies in the declining birth-rate, England and Wales 1. The Northern Counties: 2. Summary of Results for all Areas

1937 ◽  
Vol 37 (4) ◽  
pp. 489-511
Author(s):  
W. J. Martin
Keyword(s):  
Birth Rate ◽  
Age Distribution ◽  
Age Groups ◽  
Vital Statistics ◽  
Married Women ◽  
England And Wales ◽  
Fertility Ratio ◽  
Number Of Births

The trend of fertility in Wales and the Southern and Midland counties of England was demonstrated and discussed in the previous sections of this enquiry.1 The corresponding vital statistics for Northern England are given in the present concluding section and, in addition, the results that have been found are briefly reviewed for the country as a whole. For the Northern counties the same methods have been employed as in the two previous sections. Briefly, the actual birth-rate has been measured by the number of births per 1000 married women aged 15–45, while as a rough assessment of how far a changing age distribution of married women has affected its level, a potential birth-rate and fertility ratio have also been calculated. The potential birth-rate gives the number of births per 1000 married women aged 15–45 obtained by applying Tait's fertility ratios 48.75, 41.25, 30 and 15 to the number of married women in the age groups 15–19, 20–24, 25–35 and 35–45 respectively. The fertility ratio is the ratio of the actual to the potential birth-rate.

ANNUAL SUMMARY OF VITAL STATISTICS—1968

PEDIATRICS ◽  
1969 ◽  
Vol 44 (6) ◽  
pp. 1031-1034
Author(s):  
Myron E. Wegman
Keyword(s):  
Birth Rate ◽  
Marriage Rate ◽  
The United States ◽  
Vital Statistics ◽  
Natural Increase ◽  
Annual Number ◽  
Sharp Rise ◽  
Death Rates ◽  
The Third ◽  
Number Of Births

Infant mortality declined again in 1968, for the third successive year, and there is some evidence of a more rapidly downward trend in the unacceptably higher infant death rates which have existed among some population groups. The birth rate also declined again, but the marriage rate showed rather a sharp rise ( Table I ). With an excess of births over deaths of 1.55 million persons, the rate of natural increase was 7.8 per 1,000 population. Births Once more there was a decline in annual number of births, although a smaller one than last year. Nevertheless, with a rising population the birth rate fell to 17.4, the lowest ever recorded in the United States.

The decline in fertility in England and Wales since 1964

1977 ◽  
Vol 9 (2) ◽  
pp. 227-237
Author(s):  
G. N. Pollard
Keyword(s):  
Family Size ◽  
Age Groups ◽  
Young Mothers ◽  
Fertility Rates ◽  
Specific Group ◽  
England And Wales ◽  
Live Births ◽  
Age At Marriage ◽  
Interaction Component ◽  
Number Of Births

SummaryThe decline in the number of legitimate live births in England and Wales from the peak in 1964 has been partitioned into components due to changes in fertility rates, components due to changes in the composition of the population exposed to risk, and an interaction component. Fertility rates specific for age of mother at birth of child, duration of marriage, parity and age of mother at marriage were considered but in all cases it was found that the decline was not as great as the change in fertility rates implied. This was due to increases in the number of births due to changes in the composition of the population exposed to risk.The decline in the number of births due to changes in fertility rates specific for age of mother/duration of marriage/parity/age at marriage has been expressed as a percentage of the number of births to each specific group and it was found that generally the percentage decline became greater as age of mother/duration of marriage/parity/age at marriage increased. However this did not apply for the youngest age groups, the shortest durations of marriage, the youngest ages at marriage and the lowest parity. This result needs further investigation. Is this evidence of a deferment of births by young mothers (with short durations, low parities and young ages at marriage)? Alternatively, is this evidence of the beginning of a really significant and widespread change of attitude to family size?

ANNUAL SUMMARY OF VITAL STATISTICS—1965

PEDIATRICS ◽  
1966 ◽  
Vol 38 (6) ◽  
pp. 1063-1067
Author(s):  
Myron E. Wegman
Keyword(s):  
United States ◽  
Birth Rate ◽  
Crude Birth Rate ◽  
The United States ◽  
Vital Statistics ◽  
Fertility Rate ◽  
Downward Trend ◽  
United States Population ◽  
First Time ◽  
Number Of Births

A CONTINUED downward trend for births, slightly upward for marriages, and about the same rate as last year for deaths characterize the provisional vital statistics of the United States for 1965 (Table 1). Despite the falling birth rate almost 2,000,000 persons were added to the United States population through the excess of births over deaths. Births in 1965 were down about 7% from 1964, bringing the total number, estimated at 3,767,000, below 4,000,000 for the first time in 12 years. The number of births was the lowest since 1951, giving a crude birth rate of 19.4 births per 1,000 population and a fertility rate of 96.7.

V.—The Decline of the Birth-Rate : Regularities Revealed by an Analysis of the Rates Observed in Certain European Countries

1939 ◽  
Vol 58 ◽  
pp. 55-72 ◽  
Author(s):  
R. S. Barclay ◽  
W. O. Kermack
Keyword(s):  
Death Rate ◽  
Birth Rate ◽  
Age Distribution ◽  
Crude Birth Rate ◽  
Developed Countries ◽  
Vital Statistics ◽  
Annual Number ◽  
Age Group ◽  
Death Rates ◽  
The World

During recent decades the vital statistics of the more developed countries of the world have exhibited two outstanding features: the first is a decline in the death‐rate, and the second a similar decline in the birth‐rate, the latter setting in some time after the former. It is generally realised that, for an adequate study of the changes involved, it is necessary, not merely to consider the crude death‐ and birth‐rates—that is, the number of deaths and births respectively per 1000 inhabitants—but also to take into account the age distribution of the population. In the case of death‐rates, for instance, it is important to know the specific death‐rates for each age-group—that is to say, for example, the annual number of deaths of persons aged twenty, per 1000 individuals of that particular age. In the same way the crude birth‐rate can only be properly interpreted when analysed in reference to the age of the mothers.

Fertility levels, trends and differentials in Kuwait

1986 ◽  
Vol 18 (2) ◽  
pp. 197-208 ◽  
Author(s):  
K. L. Kohli ◽  
Musa'ad H. Al-Omaim
Keyword(s):  
Economic Activity ◽  
Birth Rate ◽  
Inverse Relationship ◽  
Age Groups ◽  
Crude Birth Rate ◽  
Married Women ◽  
Age At Marriage ◽  
Younger Age ◽  
Major Factors ◽  
Very High

SummaryThis paper examines the levels, trends, patterns and Kuwaiti-non-Kuwaiti differentials in fertility, by socioeconomic variables and the major factors that may account for recent changes. Kuwaiti fertility is very high: in 1980, the crude birth rate was about 47 and the total fertility was 6–8 per woman. Childbearing still extends to later ages but fertility in the early and middle reproductive years has declined recently, as a result of the rise in age at marriage and the fall in the proportion of currently married women in the younger age groups. Non-Kuwaiti fertility is consistently lower, with total fertility at about 69% of the Kuwaiti level. This differential cannot be explained by the age structure of the populations alone. Analysis of completed fertility by education and economic activity status indicates an inverse relationship.

Incidence of Twin Births in Denmark from 1911 to 1974

1978 ◽  
Vol 27 ◽  
pp. 45-49 ◽  
Author(s):  
Johannes Nielsen ◽  
Akira Homma ◽  
Bo Isaksen ◽  
Aksel Bertelsen
Keyword(s):  
Maternal Age ◽  
Birth Rate ◽  
Age Groups ◽  
Dizygotic Twin ◽  
Twin Birth ◽  
Environmental Causes ◽  
Number Of Births

A survey of twin births in Denmark in relation to the total number of births from 1911 to 1974 shows a significant decrease in the dizygotic twin birth rate for all maternal age groups. The possible environmental causes of such a decrease are discussed.

scholarly journals Updated Incidence of Thyroid Cancer in the North East Region of Romania after 35 Years of Chernobyl Fallout. Is There a Link between?

Diagnostics ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 907
Author(s):  
Laura Teodoriu ◽  
Maria Christina Ungureanu ◽  
Letitia Leustean ◽  
Cristina Preda ◽  
Delia Ciobanu ◽  
...  
Keyword(s):  
Thyroid Cancer ◽  
Age Distribution ◽  
Age Groups ◽  
Chernobyl Fallout ◽  
Statistical Correlations ◽  
North East ◽  
The North ◽  
East Region ◽  
Radioactive Cloud ◽  
The Moment

Thyroid cancer (TC) represents a worldwide problem, the consistent growth of the incidence increment issues about management of risk factors and curative treatment. Updated statistical data are not complete in the North East region of Romania and need to be improved. Therefore, through this study, we aim to renew the existing data on thyroid cancer. We conducted a retrospective study covering a period of 10 years. Data were collected from a hospital information system (InfoWorld) between 2009 and 2019. Patients’ age groups were stratified in relation with the age at the moment of the Chernobyl event. A database was obtained (Microsoft Excel) and statistical correlations were applied. In the studied period, 1159 patients were diagnosed: 968 females and 191 males, distributed by region, with the highest addressability in Iasi (529), followed by neighboring counties. Age distribution displayed that most of the thyroid cancers were in the range 4060 years old (50.94%), followed by 60–80 years old (32.41%). Most patients were diagnosed with papillary carcinoma 63.10%, then follicular 14.7%, medullary 6.74% and undifferentiated 1.02%. Romania was in the vicinity of the radioactive cloud at Chernobyl fallout, so we must deliberate whether the increased incidence of thyroid cancer in the age group 40–60 years is associated with radiogenicity (iodine 131) given the fact that over has 35 years and the half-life of other radioisotopes like Caesium-137 and Strontium -90 is completed.

scholarly journals Estimating effective infection fatality rates during the course of the COVID-19 pandemic in Germany

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Christian Staerk ◽  
Tobias Wistuba ◽  
Andreas Mayr
Keyword(s):  
Age Distribution ◽  
Age Groups ◽  
Case Fatality ◽  
Time Dependent ◽  
Temporary Increase ◽  
International Studies ◽  
Age Group ◽  
Fatality Rate ◽  
Substantial Fraction ◽  
Second Wave

Abstract Background The infection fatality rate (IFR) of the Coronavirus Disease 2019 (COVID-19) is one of the most discussed figures in the context of this pandemic. In contrast to the case fatality rate (CFR), the IFR depends on the total number of infected individuals – not just on the number of confirmed cases. In order to estimate the IFR, several seroprevalence studies have been or are currently conducted. Methods Using German COVID-19 surveillance data and age-group specific IFR estimates from multiple international studies, this work investigates time-dependent variations in effective IFR over the course of the pandemic. Three different methods for estimating (effective) IFRs are presented: (a) population-averaged IFRs based on the assumption that the infection risk is independent of age and time, (b) effective IFRs based on the assumption that the age distribution of confirmed cases approximately reflects the age distribution of infected individuals, and (c) effective IFRs accounting for age- and time-dependent dark figures of infections. Results Effective IFRs in Germany are estimated to vary over time, as the age distributions of confirmed cases and estimated infections are changing during the course of the pandemic. In particular during the first and second waves of infections in spring and autumn/winter 2020, there has been a pronounced shift in the age distribution of confirmed cases towards older age groups, resulting in larger effective IFR estimates. The temporary increase in effective IFR during the first wave is estimated to be smaller but still remains when adjusting for age- and time-dependent dark figures. A comparison of effective IFRs with observed CFRs indicates that a substantial fraction of the time-dependent variability in observed mortality can be explained by changes in the age distribution of infections. Furthermore, a vanishing gap between effective IFRs and observed CFRs is apparent after the first infection wave, while an increasing gap can be observed during the second wave. Conclusions The development of estimated effective IFR and observed CFR reflects the changing age distribution of infections over the course of the COVID-19 pandemic in Germany. Further research is warranted to obtain timely age-stratified IFR estimates, particularly in light of new variants of the virus.

scholarly journals Emerging trends in the epidemiology of invasive mycoses in England and Wales (1990–9)

2001 ◽  
Vol 126 (3) ◽  
pp. 397-414 ◽  
Author(s):  
T. L. LAMAGNI ◽  
B. G. EVANS ◽  
M. SHIGEMATSU ◽  
E. M. JOHNSON
Keyword(s):  
Disease Surveillance ◽  
Fungal Infections ◽  
Communicable Disease ◽  
Pneumocystis Carinii ◽  
Age Groups ◽  
Public Health Problem ◽  
Risk Groups ◽  
Older Age ◽  
England And Wales ◽  
Invasive Mycoses

Invasive fungal infections are becoming an increasing public health problem owing to the growth in numbers of susceptible individuals. Despite this, the profile of mycoses remains low and there is no surveillance system specific to fungal infections currently existing in England and Wales. We analysed laboratory reports of deep-seated mycoses made to the Communicable Disease Surveillance Centre between 1990 and 1999 from England and Wales. A substantial rise in candidosis was seen during this period (6·76–13·70 reports per million population/year), particularly in the older age groups. Rates of cryptococcosis in males fluctuated over the decade but fell overall (1·05–0·66 per million population/year), whereas rates of female cases gradually rose up until 1998 (0·04–0·41 per million population/year). Reports of Pneumocystis carinii in men reduced substantially between 1990 and 1999 (2·77–0·42 per million population/year) but showed little change in women. Reports of aspergillosis fluctuated up until 1996, after which reports of male and female cases rose substantially (from 0·08 for both in 1996 to 1·92 and 1·69 per million population/year in 1999 for males and females respectively), largely accounted for by changes in reporting practice from one laboratory. Rates of invasive mycoses were generally higher in males than females, with overall male-to-female rate ratios of 1·32 (95% CI 1·25–1·40) for candidosis, 1·30 (95% CI 1·05–1·60) for aspergillosis, 3·99 (95% CI 2·93–5·53) for cryptococcosis and 4·36 (95% CI 3·47–5·53) for Pneumocystis carinii. The higher male than female rates of reports is likely to be a partial reflection of HIV epidemiology in England and Wales, although this does not fully explain the ratio in infants and older age groups. Lack of information on underlying predisposition prevents further identification of risk groups affected. Whilst substantial under-reporting of Pneumocystis carinii and Cryptococcus species was apparent, considerable numbers of superficial mycoses were mis-reported indicating a need for clarification of reporting guidelines. Efforts to enhance comprehensive laboratory reporting should be undertaken to maximize the utility of this approach for surveillance of deep-seated fungal infections.

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