The effects of cash and lottery incentives on mailed surveys to physicians - A randomized trial

被引:57
作者
Leung, GM [1 ]
Ho, LM [1 ]
Chan, MF [1 ]
Johnston, JM [1 ]
Wong, FK [1 ]
机构
[1] Univ Hong Kong, Fac Med, Dept Community Med, Hong Kong, Hong Kong, Peoples R China
关键词
epidemiologic methods; incentives; data collection; motivation;
D O I
10.1016/S0895-4356(02)00442-0
中图分类号
R19 [保健组织与事业(卫生事业管理)];
学科分类号
摘要
Low response rates, especially among physicians, are a common problem in mailed survey research. We conducted a randomized trial to examine the effects of cash and lottery incentives on response rates. A total of 4,850 subjects were randomized to one of three interventions accompanying a mailed survey-no incentive (n = 1,700), cash payment [three levels of Hong Kong dollars (HKD) $10, $20, and $40; N = 50 in each subgroup], or entry into a lottery (three levels of HKD$1,000, $2,000, and $4,000; N = 1,000 in each sub.-roup) on receipt of the completed questionnaire. The response rates were higher among those offered incentives than those without (19.8% vs. 16.8%, P = .012). Cash was the more effective incentive compared to lottery (27.3% vs. 19.4%, P = .017). Response also increased substantially between the first and second mailings (14.2% vs. 18.8%, P > .001). In addition, those with specialist qualifications were more willing to participate in mailed surveys. We found no significant differences m response outcomes among the various incentive arms. Cash reward at the $20 level was the most cost-effective intervention, in terms of cost per responder. Further systematic examination of the effects of different incentive strategies in epidemiologic studies should be encouraged. Q 2002 Elsevier Science Inc. All rights reserved.
引用
收藏
页码:801 / 807
页数:7
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