BACKGROUND:Telephone surveys have been used widely in public health research internationally and are being increasingly used in Ireland and the U.K. METHODS:This study compared three telephone surveys conducted on the island of Ireland from 2000 to 2004, examining study methodology, outcome measures and the per unit cost of each completed survey. We critically examined these population-based surveys which all explored health related attitudes and behaviours. RESULTS:Over the period from 2000 to 2005 the percentage of calls which succeeded in contacting an eligible member of the public fell, from 52.9% to 31.8%. There was a drop in response rates to the surveys (once contact was established) from 58.6% to 17.7%. Costs per completed interview rose from 4.48 euro to 15.65 euro. Respondents were prepared to spend 10-15 minutes being surveyed, but longer surveys yielded poorer completion rates. Respondents were willing to discuss issues of a sensitive nature. Interviews after 9 pm were less successful, with complaints about the lateness of the call. Randomisation from electronic residential telephone directory databases excluded all ex-directory numbers and thus was not as representative of the general population as number generation by the hundred-bank method. However the directory database was more efficient in excluding business and fax numbers. CONCLUSION:Researchers should take cognisance of under-representativeness of land-line telephone surveys, of the increasing difficulties in contacting the public and of mounting personnel costs. We conclude that telephone surveying now requires additional strategies such as a multimode approach, or incentivisation, to be a useful, cost-effective means of acquiring data on public health matters in Ireland and the U.K.

译文

背景:电话调查已在国际上广泛用于公共卫生研究,并且在爱尔兰和英国越来越多地使用。
方法:本研究比较了2000年至2004年在爱尔兰岛进行的三项电话调查,检查了研究方法,结果测量和每项完成的调查的单位成本。我们批判性地检查了这些基于人群的调查,这些调查都探讨了与健康相关的态度和行为。
结果:在2000年至2005年期间,成功联系到符合条件的公众电话的比例从52.9%下降到31.8%。对调查的答复率(一旦建立联系)从58.6%下降到17.7%。每完成一次采访的费用从4.48欧元上升至15.65欧元。受访者准备花费10到15分钟的时间进行调查,但较长的调查得出的完成率较差。受访者愿意讨论敏感问题。晚上9点以后的采访不太成功,有人抱怨通话时间太晚。电子住宅电话号码簿数据库的随机化排除了所有前号码簿号码,因此不像百位银行法产生号码那样代表一般人口。但是,目录数据库在排除业务和传真号码方面效率更高。
结论:研究人员应认识到陆线电话调查的代表性不足,与公众联系日益困难以及人员成本不断增加。我们得出的结论是,电话调查现在需要多种策略,例如多模式方法或激励措施,才能成为获取爱尔兰和英国公共卫生事务数据的有用且具有成本效益的手段。

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