title: Effect on survey return rates of having a signed or unsigned postcard as the third-wave mailing.
abstract: This study assessed differences in response rates to a three-wave mail survey when signed or unsigned postcards were the third wave of the mailing (after two mailings of the questionnaire). A total of 259 signed postcards and 259 unsigned postcards were mailed as the third-wave mailing. There were 34 signed postcards and 30 unsigned postcards returned, a not significantly different distribution by chi-square test.
authors.affiliation: Department of Public Health, University of Toledo, OH 43606, USA.
authors.forename: James H
authors.initials: JH
authors.lastname: Price
authors.forename: Joseph A
authors.initials: JA
authors.lastname: Dake
authors.forename: Sutoidem
authors.initials: S
authors.lastname: Akpanudo
authors.forename: Joann
authors.initials: J
authors.lastname: Kleinfelder
mesh_terms: D006801:Humans; D011177:Postal Service; D012107:Research Design; D011795:Surveys and Questionnaires