Karonga HDSS INDEPTH Core Dataset 2003 - 2015 (Release 2017) - Malawi

Abstract
---------------------------

The Karonga Health and Demographic Surveillance System (Karonga HDSS) in northern Malawi currently has a population of more than 38 000 individuals under continuous demographic surveillance since completion of a baseline census (2002-2004). The surveillance system collects data on vital events and migration for individuals and for households. It also provides data on cause-specific mortality obtained by verbal autopsy for all age groups, and estimates rates of disease for specific presentations via linkage to clinical facility data. The Karonga HDSS provides a structure for surveys of socio-economic status, HIV-prevalence and incidence, sexual behavior, fertility intentions and a sampling frame for other studies, as well as evaluating the impact of interventions, such as antiretroviral therapy and vaccination programs. Uniquely, it relies on a network of village informants to report vital events and household moves, and furthermore is linked to an archive of biological samples and data from population surveys and other studies dating back three decades.

Geographic coverage
---------------------------

The Karonga HDSS surrounds the port village of Chilumba, on Lake Malawi, in the southern part of Karonga District . The surveillance area is located between latitudes 10.388 and 10.508S and longitudes 34.088 and 34.278E, covering an area of approximately 135 km2. The lake shore and the Nyika National Park form the boundaries to the east and west, respectively, whereas the boundaries to the north and south are delineated by village boundaries.

Analysis unit
---------------------------

Individual

Universe
---------------------------

The DSS covers all the individuals of all ages who are members of households and are residents within the geographical boundaries of the study area. Visitors too were captured in the baseline survey.

Of the 36,783 individuals under observation at the end of 2012, 48% (17,715/36,783) were male and 52% were female (19,068/36,783); 20% (7542/36,783) were aged under 5 years and 50% (18 396/ 36,783) were under 15 years of age. In all, 44% (16 277/36 783) of the population were aged between 15 and 59 years, and 6% (2160/36,783) were aged 60 years and above. The majority of the population under surveillance are rural dwellers that depend on subsistence farming and fish from the lake as a source of their livelihood.

Kind of data
---------------------------

Event history data

Frequency of data collection
---------------------------

Yearly

Sampling procedure
---------------------------

The whole population

Sampling deviation
---------------------------

None

Mode of data collection
---------------------------

Proxy Respondent [proxy]

Research instrument
---------------------------

The questionnaires are designed to capture the core HDSS information which includes the baseline, birth, inmigration, outmigration and death.

Cleaning operations
---------------------------

Data was left censored to 1 Jan 2003 to account for the start-up phase of the surveillance. Data were edited to allow people to appear in only one household at a time (for surveillance purposes men with multiple wives can be recorded as living in more than one household).

Response rate
---------------------------

The average response rate for household visits over all the rounds is around 99%

Sampling error estimates
---------------------------

Not Applicable

Data appraisal
---------------------------

CentreId MetricTable QMetric Illegal Legal Total Metric RunDate
MW011 MicroDataCleaned Starts 68652 2017-05-14 14:14
MW011 MicroDataCleaned Transitions 0 232512 232512 0. 2017-05-14 14:14
MW011 MicroDataCleaned Ends 68652 2017-05-14 14:14

摘要
---------------------------
卡拉翁加健康与人口监测系统（Karonga HDSS）位于马拉维北部，目前对该地区超过38,000名个体进行持续的人口监测，监测始于基线人口普查（2002-2004年）的完成。该监测系统收集个体及其家庭的生命事件和迁移数据。此外，它还提供了通过口头尸检获得的所有年龄段特定死因的死亡率数据，并通过与临床设施数据的关联，估计特定症状的疾病发生率。卡拉翁加HDSS为调查社会经济状况、HIV流行率和发病率、性行为、生育意愿以及其他研究提供了抽样框架，并评估了干预措施（如抗逆转录病毒治疗和疫苗接种计划）的影响。独特之处在于，它依赖于一个村庄信息员网络来报告生命事件和家庭搬迁，并且进一步与追溯到三十年前的生物样本和人口调查及其他研究的数据档案相联系。
地理覆盖范围
---------------------------
卡拉翁加HDSS环绕着马拉维湖南部的Chilumba港口村庄，位于卡拉翁加区的南部。监测区域位于南纬10.388至10.508度，东经34.088至34.278度之间，覆盖面积约135平方公里。湖岸和Nyika国家公园分别构成了东部和西部的边界，而北部和南部的边界则由村庄边界界定。
分析单位
---------------------------
个体
总体
---------------------------
该DSS涵盖了所有年龄段、居住在研究区域地理边界内的家庭成员。基线调查中还包括了访客。
截至2012年底，有36,783人在观察中，其中48%（17,715/36,783）为男性，52%（19,068/36,783）为女性；20%（7,542/36,783）年龄在5岁以下，50%（18,396/36,783）年龄在15岁以下。总体而言，44%（16,277/36,783）的人口年龄在15至59岁之间，6%（2,160/36,783）年龄在60岁以上。受监测的大多数人口为农村居民，他们依靠自给自足的农业和从湖泊中捕鱼作为其生计来源。
数据类型
---------------------------
事件历史数据
数据收集频率
---------------------------
每年
抽样程序
---------------------------
整个总体
抽样偏差
---------------------------
无
数据收集方式
---------------------------
代理受访者 [代理]
研究工具
---------------------------
问卷被设计用来捕捉核心HDSS信息，包括基线、出生、迁入、迁出和死亡。
数据清理操作
---------------------------
数据被截断至2003年1月1日，以考虑监测的启动阶段。数据经过编辑，以确保人们一次只能出现在一个家庭中（为了监测目的，拥有多个妻子的男性可以记录为居住在多个家庭中）。
响应率
---------------------------
所有轮次家庭访问的平均响应率约为99%。
抽样误差估计
---------------------------
不适用
数据评估
---------------------------
CentreId MetricTable QMetric 非法 合法 总计 Metric RunDate
MW011 MicroDataCleaned Starts 68652 2017-05-14 14:14
MW011 MicroDataCleaned Transitions 0 232,512 232,512 0. 2017-05-14 14:14
MW011 MicroDataCleaned Ends 68652 2017-05-14 14:14