COVID-19 Survey in Five National Longitudinal Cohort Studies: Millennium Cohort Study, Next Steps, 1970 British Cohort Study and 1958 National Child Development Study, 2020-2021

<p>The Centre for Longitudinal Studies (CLS) and the MRC Unit for Lifelong Health and Ageing (LHA) have carried out two online surveys of the participants of five national longitudinal cohort studies which have collected insights into the lives of study participants including their physical and mental health and wellbeing, family and relationships, education, work, and finances during the coronavirus pandemic. The Wave 1 Survey was carried out at the height of lockdown restrictions in May 2020 and focussed mainly on how participants’ lives had changed from just before the outbreak of the pandemic in March 2020 until then. The Wave 2 survey was conducted in September/October 2020 and focussed on the period between the easing of restrictions in June through the summer into the autumn. A third wave of the survey was conducted in early 2021.</p><p>In addition, CLS study members who had participated in any of the three COVID-19 Surveys were invited to provide a finger-prick blood sample to be analysed for COVID-19 antibodies. Those who agreed were sent a blood sample collection kit and were asked to post back the sample to a laboratory for analysis. The antibody test results and initial short survey responses are included in a single dataset, the <span style="font-style: italic;">COVID-19 Antibody Testing in the National Child Development Study, 1970 British Cohort Study, Next Steps and Millennium Cohort Study, 2021</span> (SN 8823).</p><p>The CLS studies are:</p><ul><li>Millennium Cohort Study (born 2000-02) both cohort members and parents (MCS)</li><li>Next Steps (born 1989-90) (NS)</li><li>1970 British Cohort Study (BCS70)</li><li>1958 National Child Development Study (NCDS).</li></ul><p>The LHA study is:</p><ul><li>MRC National Survey of Health and Development, 1946 British birth cohort (NSHD)</li></ul><p>The content of the MCS, NS, BCS70 and NCDS COVID-19 studies, including questions, topics and variables can be explored via the <a href="https://discovery.closer.ac.uk/explore/variables/uk.closer/4caa51db-56a9-4b48-b4ef-00347fe130e7/uk.closer/09263728-048e-48c5-b735-32d3d70f4533">CLOSER Discovery</a> website. </p>
<p>The <span style="font-style: italic;">COVID-19 Survey in Five National Longitudinal Cohort Studies: Millennium Cohort Study, Next Steps, 1970 British Cohort Study and 1958 National Child Development Study, 2020-2021 </span>contains the data from waves 1, 2 and 3 for the 4 cohort studies. The data from all four CLS cohorts are included in the same dataset, one for each wave.<br><br>The COVID-19 Survey data for the 1946 birth cohort study (NSHD) run by the LHA is held under
<a href="https://beta.ukdataservice.ac.uk/datacatalogue/studies/study?id=8732" style="background-color: rgb(255, 255, 255);">SN 8732
</a>and available under Special Licence access conditions.<br><br><span style="font-weight: bold;">Latest edition information</span><span style="font-weight: 700;"><br></span>For the fourth edition (June 2022), the following minor corrections have been made to the wave 3 data:</p><ul><li>corrections to a small number of cases where CW3_GROW and CW3_GROWB were incorrectly calculated</li><li>recoded values and reformatted the code list for CW3_COVIDVAC as the original value of 3 was removed from the final version of the survey<br></li></ul>

纵向研究中心（Centre for Longitudinal Studies, CLS）与医学研究理事会终身健康与衰老研究单元（MRC Unit for Lifelong Health and Ageing, LHA）针对五项全国性纵向队列研究的参与者开展了相关调查，相关研究收集了新冠疫情期间参与者的生活轨迹数据，涵盖其身心健康状况、家庭与人际关系、教育、工作及财务情况。其中，第一波调查于2020年5月封控最严格的阶段开展，核心聚焦自2020年3月疫情暴发前夕至调查开展时参与者生活的变化情况；第二波调查于2020年9月至10月间进行，聚焦封控措施放松后从夏季延续至秋季的时段；第三波调查则于2021年初开展。

此外，所有参与过上述三轮新冠调查的CLS研究成员均被邀请采集指尖血样本以开展新冠抗体检测。同意参与的受试者会收到血液样本采集套件，并需将样本寄回实验室进行分析。抗体检测结果与初期简短问卷的应答数据共同收录于名为*COVID-19 Antibody Testing in the National Child Development Study, 1970 British Cohort Study, Next Steps and Millennium Cohort Study, 2021*（编号SN 8823）的单一数据集内。

CLS涵盖的队列研究包括：
• 千禧年队列研究（Millennium Cohort Study, MCS）：涵盖队列成员及其父母
• 下一代研究（Next Steps, NS）：针对1989-1990年出生队列
• 1970年英国队列研究（1970 British Cohort Study, BCS70）
• 1958年全国儿童发展研究（1958 National Child Development Study, NCDS）

LHA牵头开展的队列研究为：
• 医学研究理事会1946年英国出生队列全国健康与调查研究（MRC National Survey of Health and Development, 1946 British birth cohort, NSHD）

可通过<a href="https://discovery.closer.ac.uk/explore/variables/uk.closer/4caa51db-56a9-4b48-b4ef-00347fe130e7/uk.closer/09263728-048e-48c5-b735-32d3d70f4533">CLOSER Discovery</a>网站查询MCS、NS、BCS70及NCDS新冠相关研究的内容，包括问卷题目、研究主题与变量信息。

*COVID-19 Survey in Five National Longitudinal Cohort Studies: Millennium Cohort Study, Next Steps, 1970 British Cohort Study and 1958 National Child Development Study, 2020-2021*数据集收录了上述四项CLS队列研究的三轮调查数据，四个CLS队列的所有数据均整合至同一数据集内，按波次分别存储。

由LHA牵头开展的1946年出生队列研究（NSHD）的新冠调查数据收录于<a href="https://beta.ukdataservice.ac.uk/datacatalogue/studies/study?id=8732" style="background-color: rgb(255, 255, 255);">SN 8732</a>数据集，需通过特殊许可访问权限方可获取。

**最新版本信息**
2022年6月发布的第四版对第三波调查数据进行了两处小幅修正：
• 修正了少量CW3_GROW与CW3_GROWB计算错误的样本案例
• 针对CW3_COVIDVAC变量重新编码了取值并更新了编码列表，原调查最终版本中移除了取值3