Objective: To chart the transition in myocardial infarction mortality in NSW between 1969 and 1994 and to determine whether spatial, marital and occupational status differentials increased over time, despite overall m...
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Objective: To chart the transition in myocardial infarction mortality in NSW between 1969 and 1994 and to determine whether spatial, marital and occupational status differentials increased over time, despite overall mortality decline. Method: The study was undertaken in NSW for the 25-year period from 1969 when mortality from ischaemic heart disease declined. The demographic and spatial analysis involved descriptive epidemiology and utilised the unit list mortality fifes of the Australian Bureau of Statistics which are based on detailed death certificate information. Results: Spatial, marital and occupational status differentials in myocardial infarction mortality increased over time, more especially variations by occupational status, inland/metropolitan differences, and married/divorced or widowed variation. Spatial variations in mortality were not simply the result of occupational status differences as mortality from white collar groups was also elevated in inland areas. Spatial variation in mortality was not diluted due to the impact of immigration. Conclusion: Particular subgroups of people remained at risk and it is likely that differential access to ambulance services and travel time contribute, more particularly in inland rural areas. Implications: Groups at risk need to be more precisely targeted for preventative measures and public health initiatives, with particular implications for groups in inland rural areas. the Hunter Region, and outer lower income areas of Sydney.
As contribution to a recent debate (James, 1998; Murphy et al., 1997, 1998) the proportion of twins following ovulation induction (OI) or assisted conception (AC) in 1994 in Oxfordshire and West Berkshire was estimate...
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As contribution to a recent debate (James, 1998; Murphy et al., 1997, 1998) the proportion of twins following ovulation induction (OI) or assisted conception (AC) in 1994 in Oxfordshire and West Berkshire was estimated, and by extrapolation the natural twinning rate in England and Wales was judged to have maintained a plateau phase since the 1970s. Similar figures for 1995 and 1996 from the same study, and hence a more stable local estimate, are now provided. The proportions, as before, were estimated from women's responses to a questionnaire within a case[hyphen]control study, with ascertainment from general practitioners' records or hospital case[hyphen]notes for non[hyphen]responders or for those excluded from the study originally. In 1994, 1995 and 1996 the proportion of twins following OI/AC was overall 27% (24%, 30% and 27% respectively). Restriction to the 87% locally resident made no difference. The national crude twinning rate for those years was overall 13·3 per 1000 maternities (12·8, 13·6 and 13·4 respectively).
作者：
Casper, LMCohen, PNNICHHD
Fertil & Family Stat Branch US Census Bur Bethesda MD 20892 USA NICHHD
Demog & Behav Sci Branch Populat Res Ctr Bethesda MD 20892 USA Univ Calif Irvine
Populat Div US Census Bur Irvine CA USA Univ Calif Irvine
Dept Sociol Irvine CA USA
We use March Current Population Survey (CPS) data from 1977 to 1997 to produce a new historical series of indirect cohabitation prevalence estimates. We compare our new estimates with those produced by the traditional...
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We use March Current Population Survey (CPS) data from 1977 to 1997 to produce a new historical series of indirect cohabitation prevalence estimates. We compare our new estimates with those produced by the traditional method and evaluate the new estimates. We then compare the indirect estimates with the new direct estimates to investigate whether biases exist in the indirect estimates. Our findings indicate that the traditional indirect method of estimating cohabitation prevalence underestimates cohabiters in different subpopulations, especially among those with children. We also find that the new indirect measure produces relatively unbiased estimates of cohabitors' characteristics.
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