Dummer T J, Dickinson H O, Pearce M S, Charlton M E, Parker L
North of England Children's Cancer Research Unit, Department of Child Health, University of Newcastle upon Tyne, Royal Victoria Infirmary, Queen Victoria Road, Newcastle upon Tyne, NE1 4LP, England, UK.
J Clin Epidemiol. 2000 Feb;53(2):147-55. doi: 10.1016/s0895-4356(99)00169-9.
The objective of this study was to determine whether inequality in stillbirth risk between social strata has changed over time. Subjects were all 288,869 births in Cumbria, northwest England, 1950-1993 and all 8,039,269 births in England and Wales, 1981-1992. Social class of Cumbrian babies was ascertained from birth registrations. Community deprivation scores were calculated from census data for (i) enumeration districts in Cumbria and (ii) county districts in England and Wales. The relative index of inequality was used to measure inequality of stillbirth risk between social strata. Results indicate inequality in stillbirth risk in Cumbria has fallen significantly since 1966 (P< or =0.02) and was not evident in more recent time periods. In England and Wales, there was significant inequality in stillbirth risk in all time periods and no evidence that this has changed over time. Inequality in stillbirth risk has not increased and in some areas has attenuated in recent years.
本研究的目的是确定社会阶层之间死产风险的不平等是否随时间而变化。研究对象为1950年至1993年英格兰西北部坎布里亚郡的所有288,869例出生以及1981年至1992年英格兰和威尔士的所有8,039,269例出生。坎布里亚郡婴儿的社会阶层通过出生登记确定。社区剥夺分数根据（i）坎布里亚郡的枚举区和（ii）英格兰和威尔士的县区的人口普查数据计算得出。不平等相对指数用于衡量社会阶层之间死产风险的不平等。结果表明，自1966年以来，坎布里亚郡死产风险的不平等显著下降（P≤0.02），并且在最近的时间段内不明显。在英格兰和威尔士，所有时间段内死产风险都存在显著不平等，且没有证据表明这种情况随时间而变化。近年来，死产风险的不平等没有增加，在某些地区甚至有所减轻。
