Transition from Birth to Ten to Birth to Twenty: the South African cohort reaches 13 years of age
Transition from Birth to Ten to Birth to Twenty: the South African cohort reaches 13 years of age
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DOI：
10.1111/j.1365-3016.2004.00572.x
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发表时间：
2004-07-01
影响因子：
2.8
通讯作者：
De Wet, T
中科院分区：
文献类型：
--
作者：
Richter, LM;Norris, SA;De Wet, T
“从出生到十岁”现在是“从出生到二十岁”（BT20），是非洲规模最大、运行时间最长的纵向出生队列研究。本文描述了招募、随访和减员的方法、规模和意义。尽管在 1990 年初的 7 周登记期内，该地区通报了超过 5000 名新生儿的出生，但只有 3275 名儿童被确定是由至少在孩子生命的前 6 个月居住在大约翰内斯堡都市区的妇女所生的。其中 70% 的儿童及其家人接受了超过 12 年的随访，表明每年平均流失率低于 3%，其中大多数流失发生在研究的前 2 年。最常见的自然减员原因是移出研究区域，尽管详细的后续行动以及后来重新建立的联系程度表明，妇女和幼儿在城市和农村地区之间的循环流动程度非常高，而且城市地区内的居住流动性也非常高。弱势家庭和儿童没有遭受不同程度的损失。居住在索韦托的非洲妇女是该研究中最一致的参与者。由于难以招收大都市中 1989-90 年间使用私人送货服务的一小部分人（主要是白人），因此在该项目的招募阶段引入了人口群体成员资格和居住地区的偏见。
Birth to Ten now Birth to Twenty (BT20), is the largest and longest running longitudinal birth cohort study in Africa. In this paper, the methods, magnitude and significance of recruitment, follow-up and attrition are described. Although more than 5000 births were notified in the area in the 7-week enrolment period in early 1990, only 3275 children were established to have been born to women who were residents in the Greater Johannesburg Metropolitan area for at least the first 6 months of the child's life. Seventy per cent of these children and their families have been followed up for more than 12 years, indicating an average attrition rate of less than 3% per annum, with most attrition occurring in the first 2 years of the study. The most common reason for attrition was movement out of the study area, although detailed follow-up, and the extent of contact re-established at later points, indicate very high levels of circular migration among women and young children between urban and rural areas, as well as very high levels of residential mobility within urban areas. There has been no differential loss of vulnerable families and children. African women living in Soweto are the most consistent participants in the study. A bias, by population group membership and residential area, was introduced in the recruitment phases of the project by the difficulty of enrolling the small proportion of people in the metropolis, largely Whites, who used private delivery services in 1989-90.