RANDOM DIGIT DIALING - THE POTENTIAL EFFECT ON SAMPLE CHARACTERISTICS OF THE CONVERSION OF NONRESIDENTIAL TELEPHONE NUMBERS
RANDOM DIGIT DIALING - THE POTENTIAL EFFECT ON SAMPLE CHARACTERISTICS OF THE CONVERSION OF NONRESIDENTIAL TELEPHONE NUMBERS
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DOI：
10.1093/oxfordjournals.aje.a116452
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发表时间：
1992-12-01
影响因子：
5
通讯作者：
HEUSER, L
中科院分区：
文献类型：
--
作者：
VOIGT, LF;DAVIS, S;HEUSER, L
这项研究考察了电话号码的住宅状态随时间的变化，以及电话号码从非住宅变为住宅的家庭的特征。作者确定了1987年华盛顿州在1979至1986年间进行的六项病例对照研究中发现的所有电话号码(n=9107)的状态。到1987年，1,901个电话号码中有1,333个电话号码成为住宅号码，已完成电话访谈，以获得有关家庭特征的信息。访谈显示，在家庭收入、家庭成员年龄和户主受教育程度方面，拥有非住宅电话号码的家庭在家庭收入、家庭成员年龄和户主受教育程度方面与一般人口不同。同一地区的数据显示，在1987至1988年的12个月期间，所有住宅电话号码的比例根据前缀(大致定义地理区域)的不同而发生不同的变化，其中一些前缀显示住宅电话号码增加了20%以上，而其他前缀在同一时期减少或保持不变。我们的结论是，使用两阶段设计或排除以前拨打的号码的随机数字拨号方法可能会导致有偏抽样，除非考虑随时间的变化。
This study examined the changes over time in the residential status of telephone numbers and the characteristics of households with telephone numbers that changed from nonresidential to residential. The authors determined the status in 1987 of all phone numbers (n = 9,107) that had been found to be nonresidential in six case-control studies conducted between 1979 and 1986 in Washington State. A telephone interview to obtain information on household characteristics was completed for 1,333 of the 1,901 phone numbers that had become residential by 1987. The interviews revealed that households with phone numbers that had previously been nonresidential differed from the general population with respect to household income, the age of household members, and the education of the head of the household. Data for the same area showed that the proportion of all phone numbers that were residential changed differentially according to the prefix (which roughly defines geographic area) during a 12-month period between 1987 and 1988, with some prefixes showing increases in residential phone numbers of more than 20%, while other prefixes decreased or stayed the same over the same period. We conclude that methods of random digit dialing that use two-stage designs or exclude previously dialed numbers may result in biased sampling unless changes over time are considered.