Janjua Naveed Zafar, Khan Mohammad Imran, Clemens John D
Department of Community Health Sciences, Aga Khan University, Karachi, Pakistan.
Trop Med Int Health. 2006 Dec;11(12):1832-40. doi: 10.1111/j.1365-3156.2006.01736.x.
To assess injection practices and to test interventions aimed at reducing unsafe injections in developing countries, cluster surveys and cluster randomized trials are needed. The design of cluster-based studies requires estimates of intraclass correlation coefficients that have to be obtained from previous studies. This study presents such estimates.
Data were derived from a cross-sectional study of injection use and health seeking in Pakistan that used 34 clusters to select 1150 study subjects aged > or =3 months. We analysed variance to separate its components.
Most of intraclass correlation coefficients were in the range of 0.01-0.05. For proportion of injections received during last 3 months, mean number of injections received and health seeking during the past 3 months the intraclass correlation coefficients were 0.02, 0.04 and 0.02, respectively.
These estimates can be useful in designing cluster surveys and cluster randomized trials for injection safety in Pakistan and other developing countries.
为了评估注射行为并测试旨在减少发展中国家不安全注射的干预措施，需要进行整群调查和整群随机试验。基于整群的研究设计需要估计组内相关系数，而这些系数必须从前瞻性研究中获取。本研究给出了此类估计值。
数据来源于巴基斯坦一项关于注射使用和寻求医疗服务的横断面研究，该研究采用34个整群来选取1150名年龄≥3个月的研究对象。我们分析方差以分离其各个组成部分。
大多数组内相关系数在0.01 - 0.05范围内。对于过去3个月内接受注射的比例、过去3个月内接受注射的平均次数以及寻求医疗服务的情况，组内相关系数分别为0.02、0.04和0.02。
这些估计值对于设计巴基斯坦及其他发展中国家注射安全方面的整群调查和整群随机试验可能有用。
