Telephone surveys are critical for examining cross-sectional characteristics of population subgroups, tracking trends in prevalence of conditions and risk behaviors over time, identifying risk factors associated with multiple health conditions, and assessing the effects of interventions. Technology has aided telephone research through advances such as computer-assisted telephone interviewing. However, technology such as answering machines and caller ID has contributed to declines in response rates and has increased costs of conducting telephone surveys. The exponential increase in cell phone utilization presents a challenge to the tradition of random digit dial (RDD) surveys of households. Because telephone surveys are used by other industries such as marketing and public opinion polling, the marketplace may help drive innovation and adaptation. Cell phones have made telephone communication an even greater part of the everyday culture and could make potential telephone survey respondents even more accessible to public health researchers.

中文翻译：

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21世纪电话调查研究的新挑战。

电话调查对于以下方面至关重要：检查人群的横断面特征，随时间推移跟踪状况和风险行为的流行趋势，识别与多种健康状况相关的风险因素以及评估干预措施的效果。技术通过诸如计算机辅助电话采访之类的进步帮助电话研究。但是，诸如答录机和呼叫者ID之类的技术导致响应率下降，并增加了进行电话调查的成本。手机使用率的指数级增长对家庭的随机数字拨号（RDD）调查传统提出了挑战。由于电话调查被市场营销和民意测验等其他行业所使用，因此市场可能有助于推动创新和适应。