Seasonality of births: changing pattern correlated with the seasonality of marriage.
نویسندگان
چکیده
منابع مشابه
Seasonality of births in Croatia.
The aim of this paper was to investigate seasonal fluctuations of the number of births in Croatia. Vital registration data from the years 1970-2002 was used for analysis of the quarterly data (from the years 1970-1997), and monthly data (from the years 1998-2002). Both data sets were smoothed, using seasonal variation removal for quarterly data, and T4253H smoothing for monthly data. Edwards te...
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Correlation in space between seasonality of malaria and seasonality of rainfall was studied in Sri Lanka. A simple seasonality index was developed by making use of the bimodal seasonality of both malaria and rainfall. The malaria seasonality index was regressed against the rainfall seasonality index taking spatial autocorrelation into account. Despite the presence of spatial autocorrelation, th...
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Broomcorn millet (Panicum miliaceum) was known throughout Eurasia in the second millennium BC in regions with warm, moist summers, where its cultivation reduced agricultural risk. Its cultivation during the warm, but dry months at Kyzyltepa and other Iron Age sites in western Central Asia was probably made possible through irrigation practices that were long known and originally developed in th...
متن کاملThe Variability of Seasonality
Seasons are the complex nonlinear response of the physical climate system to regular annual solar forcing. There is no a priori reason why they should remain fixed/invariant from year to year, as is often assumed in climate studies when extracting the seasonal component. The widely used econometric variant of Census Method II Seasonal Adjustment Program (X-11), which allows for year-to-year var...
متن کاملChanging seasonality of birth--a possible environmental effect.
STUDY OBJECTIVE Seasonality of birth was examined to determine whether this has changed over the last half century. DESIGN Time-series analysis was carried out on retrospective data, both for the full 50 year period and for the five decades within that period. Although the primary objective was to investigate seasonality by fitting an appropriate model and examining changes over the period st...
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ژورنال
عنوان ژورنال: Journal of Epidemiology & Community Health
سال: 1995
ISSN: 0143-005X
DOI: 10.1136/jech.49.1.110