基于人群的研究中数据抽样的参与率的重要性，特别提及瑞典的骨量情况。
Importance of participation rate in sampling of data in population based studies, with special reference to bone mass in Sweden.
作者信息
Düppe H, Gärdsell P, Hanson B S, Johnell O, Nilsson B E
机构信息
Department of Orthopaedics, Malmö University Hospital, Sweden.
出版信息
J Epidemiol Community Health. 1996 Apr;50(2):170-3. doi: 10.1136/jech.50.2.170.
OBJECTIVE
To study the effects of participation rate in sampling on "normative" bone mass data.
DESIGN
This was a comparison between two randomly selected samples from the same population. The participation rates in the two samples were 61.9% and 83.6%. Measurements were made of bone mass at different skeletal sites and of muscle strength, as well as an assessment of physical activity.
SETTING
Malmö, Sweden.
SUBJECTS
There were 230 subjects (117 men, 113 women), aged 21 to 42 years.
RESULTS
Many subjects participated in both studies (163). Those who took part only in the study with the higher participation rate (67) almost invariably had higher values for bone mass density at the sites measured (up to 7.6% for men) than participants in the study with the lower participation rate. No differences in muscle strength were recorded.
CONCLUSION
A high degree of compliance is important to achieve a reliable result in determining normal values in population based studies.
目的
研究抽样参与率对“标准”骨量数据的影响。
设计
这是对来自同一人群的两个随机样本进行的比较。两个样本的参与率分别为61.9%和83.6%。对不同骨骼部位的骨量、肌肉力量进行了测量，并对身体活动进行了评估。
地点
瑞典马尔默。
研究对象
230名年龄在21至42岁之间的受试者（117名男性，113名女性）。
结果
许多受试者参与了两项研究（163人）。那些仅参与参与率较高研究的受试者（67人）在所测量部位的骨密度值几乎总是高于参与率较低研究的受试者（男性高达7.6%）。未记录到肌肉力量的差异。
结论
在基于人群的研究中，为获得确定正常值的可靠结果，高依从性很重要。
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