title: Cost Analysis of Internet vs. Print Interventions for Physical Activity Promotion.
abstract: OBJECTIVE: The objective of this study was to compare the costs associated with Internet and print-based physical activity interventions.  METHOD: The costs associated with delivering tailored print and Internet-based interventions were estimated from a randomized controlled physical activity trial (n=167). The estimates were based on research assistant time sampling surveys, web development invoices, and other tracking procedures.  RESULTS: Web-development costs for the Internet intervention were $109,564. Taken together with the website hosting fees and staff costs, the cost per participant per month was $122.52 The cost of the print intervention was $35.81 per participant per month. However, in a break-even analysis, the Internet intervention became more cost-efficient, relative to the print intervention, when the total number of participants exceeded 352.  CONCLUSIONS: Relative to print-based interventions, Internet-based interventions may be a more cost efficient way to reach a large number of sedentary individuals.
authors.affiliation: University of Minnesota, School of Kinesiology, 209 Cooke Hall, 1900 University Avenue SE, Minneapolis, MN 55455, USA.
authors.forename: Beth A
authors.initials: BA
authors.lastname: Lewis
authors.forename: David M
authors.initials: DM
authors.lastname: Williams
authors.forename: Charles J
authors.initials: CJ
authors.lastname: Neighbors
authors.forename: John M
authors.initials: JM
authors.lastname: Jakicic
authors.forename: Bess H
authors.initials: BH
authors.lastname: Marcus
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