Beydoun Hind, Saftlas Audrey F, Harland Kari, Triche Elizabeth
Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, IA 52242, USA.
J Clin Epidemiol. 2006 Jul;59(7):732-8. doi: 10.1016/j.jclinepi.2005.11.011. Epub 2006 Mar 24.
To compare tracing and contact rates using alternative incentives in a computer-assisted telephone interview (CATI) survey among postpartum women.
In a randomized trial of 1,061 postpartum women 18-49 years of age selected from four Iowa counties, we compared the effects of: (1) unconditional $5 telephone card incentive enclosed with the introductory letter followed by $25 incentive conditional upon successful telephone tracing, contact, and completion of CATI (Group 1, n = 530) vs. (2) $30 incentive conditional upon subject completion of CATI (Group 2, n = 531).
Overall telephone tracing and contact rates achieved were 67.8% and 66.6%, respectively. Tracing (70.2 vs. 65.4%, P = .09) and contact (68.5 vs. 64.8%, P = .26) rates were consistently higher among subjects assigned the combination of a conditional and an unconditional incentive. The combined incentive type had a greater impact on telephone tracing success rates for subjects on whom we could not initially locate an active telephone number (16.7 vs. 7.3%, P = .07) when compared to subjects for whom we found an active telephone number at the time of mailing the introductory letter (78.9 vs. 75.9%, P = .30).
Combining conditional and unconditional recruitment incentives can facilitate telephone tracing efforts in surveys conducted among recently postpartum women.
在一项针对产后女性的计算机辅助电话访谈（CATI）调查中，比较使用不同激励措施的追踪率和联系率。
在一项从爱荷华州四个县选取1061名18 - 49岁产后女性的随机试验中，我们比较了以下两种情况的效果：（1）随介绍信附上5美元无条件电话卡激励，随后若成功进行电话追踪、联系并完成CATI则给予25美元激励（第1组，n = 530）与（2）若受试者完成CATI则给予30美元激励（第2组，n = 531）。
总体电话追踪率和联系率分别为67.8%和66.6%。在被给予有条件和无条件激励组合的受试者中，追踪率（70.2%对65.4%，P = 0.09）和联系率（68.5%对64.8%，P = 0.26）始终更高。与在邮寄介绍信时就找到有效电话号码的受试者相比（78.9%对75.9%，P = 0.30），组合激励类型对最初无法找到有效电话号码的受试者的电话追踪成功率影响更大（16.7%对7.3%，P = 0.07）。
在近期产后女性中进行的调查里，结合有条件和无条件招募激励措施可促进电话追踪工作。
