Abstract Background It has been demonstrated that the enclosure of money with a mailed questionnaire increases the response rate significantly.We evaluated scratch lottery tickets as an Perfumes alternative to cash.Methods 1500 randomly selected Norwegians between the ages of 40 and 65 years were sent a short questionnaire.250 received one lottery scratch ticket worth 20 Norwegian kroner (approximately 3 US$) together with the questionnaire, 250 received two scratch tickets, and 250 were promised two scratch tickets if they replied within one week.A fourth group of 250 persons received a 50 kroner banknote with the questionnaire.
The remaining 500 letters served as controls.Results The overall response rate after 6 weeks was 77%.Logistic regression analysis showed that only the 50 kroner group had a response rate that was statistically significantly higher than the controls (p Conclusion It is possible that the recipients scratched their cards before completing the questionnaire, and that it was a disincentive for the majority that they did not win anything.Lottery scratch tickets are no substitute for cash as an IEC Power Cords incentive to respond to a questionnaire.