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首页> 外文期刊>Journal of Health Services Research & Policy >Increasing response rates to postal questionnaires: a randomised trial of variations in design
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Increasing response rates to postal questionnaires: a randomised trial of variations in design

机译：对邮政调查表的答复率提高：设计变化的随机试验

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Objectives: Low response rates to postal questionnaires can threaten the validity of studies by reducing theneffective sample size and introducing bias. The identification of methods with which to optimise response ratesncould, therefore, improve the quality of studies. In an attempt to identify such methods, we undertook anrandomised trial of two simple variations in questionnaire design.nMethods: Using a 262 factorial design, we conducted a randomised trial to test two variations in questionnairendesign; the questionnaires were printed on either single-sided or double-sided paper and had either a single- ornmultiple-booklet layout. Using equal random allocation, 3836 women were randomised to receive one of thesenquestionnaires as part of a study investigating risk factors for osteoporotic fractures.nResults: One thousand eight hundred and seventy questionnaires were returned, giving an overall response rate ofn48.7%. There were no significant differences in the overall response to each of the four questionnaire designs.nWhen the number of responders who completed at least 50% of each of the three sections was identified, it wasnfound that single-booklet questionnaires had a better response than the multiple-booklet questionnaires and thatnsingle-sided questionnaires had a better response than double-sided questionnaires. However, these results were notnsignificant at the 5% level. There were no significant differences in the response to questions on the odd (left-handnside) pages for the single- compared with the double-sided questionnaires.nConclusion: As the most cost-effective use of resources, we would advocate the use of double- rather than singlesidednquestionnaires, and use of a single- rather than multiple-booklet design.
机译：目标：对邮政调查表的低回应率可能会降低有效样本量并引入偏见，从而威胁到研究的有效性。因此，确定最佳反应率的方法可以提高研究质量。为了确定这种方法，我们对问卷设计中的两个简单变化进行了随机试验。n方法：使用262阶乘设计，我们进行了一项随机试验，以检验问卷设计中的两个变化。问卷以单面或双面纸打印，并且布局为单小册子或多小册子。采用平等随机分配法，将3836名妇女随机分组，接受一项问卷调查，作为一项研究骨质疏松性骨折危险因素的研究的一部分。n结果：退回了187份问卷，总答复率为48.7％。四种问卷设计的总体回答没有显着差异。n当确定完成三个部分中每个部分的至少50％的受访者的数量时，发现单小册子问卷的回答要好于问卷设计。多小册子问卷和单面问卷的回答比双面问卷要好。但是，这些结果在5％的水平上并不重要。单面问卷与双面问卷相比，在奇数页（左侧）上对问题的回答没有显着差异。n结论：作为最经济有效的资源使用方式，我们提倡使用双面问卷-而不是单面问卷，并使用单本而不是多本小册子的设计。

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