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Recruitment of young adults into a randomized controlled trial of weight gain prevention: message development, methods, and cost.

Tate DF, LaRose JG, Griffin LP, Erickson KE, Robichaud EF, Perdue L, Espeland MA, Wing RR - Trials (2014)

Bottom Line: Few studies have recruited for prevention of weight gain, particularly in young adults.The most common reason for ineligibility was already being obese (BMI >30 kg/m2).Television, radio, paid print advertising, flyers and community events each yielded fewer than 10% of study participants.

View Article: PubMed Central - PubMed

Affiliation: The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA. dtate@unc.edu.

ABSTRACT

Background: Young adulthood (age 18 to 35) is a high-risk period for unhealthy weight gain. Few studies have recruited for prevention of weight gain, particularly in young adults. This paper describes the recruitment protocol used in the Study of Novel Approaches to Prevention (SNAP).

Methods: We conducted extensive formative work to inform recruitment methods and message development. We worked with a professional marketing firm to synthesize major themes and subsequently develop age-appropriate messages for recruitment. A variety of approaches and channels were used across two clinical centers to recruit young adults who were normal or overweight (body mass index (BMI) 21 to 30 kg/m2) for a 3-year intervention designed to prevent weight gain. We tracked recruitment methods, yields, and costs by method. Logistic regression was used to identify recruitment methods that had the highest relative yield for subgroups of interest with covariate adjustments for clinic.

Results: The final sample of 599 participants (27% minority, 22% male) was recruited over a 19-month period of sustained efforts. About 10% of those who initially expressed interest via a screening website were randomized. The most common reason for ineligibility was already being obese (BMI >30 kg/m2). The top two methods for recruitment were mass mailing followed by email; together they were cited by 62% of those recruited. Television, radio, paid print advertising, flyers and community events each yielded fewer than 10% of study participants. Email was the most cost-effective method per study participant recruited.

Conclusions: These findings can guide future efforts to recruit young adults and for trials targeting weight gain prevention.

Trial registration: ClinicalTrials.gov NCT01183689 (registered 13 August 2010).

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Related in: MedlinePlus

CONSORT diagram.
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Fig3: CONSORT diagram.

Mentions: The CONSORT diagram (Figure 3) indicates the number screened and the reasons for ineligibility at each point in the recruitment screening process. Online prescreening forms (n = 5,821) were completed on the study recruitment website. Age, BMI and intentions for purposeful weight gain were recorded, and almost 70% of those completing the online screener were eligible based on these minimal criteria. Of those ineligible at prescreen, the majority (90%) were due to BMI, and of those excluded for BMI, 95% were for BMI above 30 kg/m2.Figure 3


Recruitment of young adults into a randomized controlled trial of weight gain prevention: message development, methods, and cost.

Tate DF, LaRose JG, Griffin LP, Erickson KE, Robichaud EF, Perdue L, Espeland MA, Wing RR - Trials (2014)

CONSORT diagram.
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4150977&req=5

Fig3: CONSORT diagram.
Mentions: The CONSORT diagram (Figure 3) indicates the number screened and the reasons for ineligibility at each point in the recruitment screening process. Online prescreening forms (n = 5,821) were completed on the study recruitment website. Age, BMI and intentions for purposeful weight gain were recorded, and almost 70% of those completing the online screener were eligible based on these minimal criteria. Of those ineligible at prescreen, the majority (90%) were due to BMI, and of those excluded for BMI, 95% were for BMI above 30 kg/m2.Figure 3

Bottom Line: Few studies have recruited for prevention of weight gain, particularly in young adults.The most common reason for ineligibility was already being obese (BMI >30 kg/m2).Television, radio, paid print advertising, flyers and community events each yielded fewer than 10% of study participants.

View Article: PubMed Central - PubMed

Affiliation: The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA. dtate@unc.edu.

ABSTRACT

Background: Young adulthood (age 18 to 35) is a high-risk period for unhealthy weight gain. Few studies have recruited for prevention of weight gain, particularly in young adults. This paper describes the recruitment protocol used in the Study of Novel Approaches to Prevention (SNAP).

Methods: We conducted extensive formative work to inform recruitment methods and message development. We worked with a professional marketing firm to synthesize major themes and subsequently develop age-appropriate messages for recruitment. A variety of approaches and channels were used across two clinical centers to recruit young adults who were normal or overweight (body mass index (BMI) 21 to 30 kg/m2) for a 3-year intervention designed to prevent weight gain. We tracked recruitment methods, yields, and costs by method. Logistic regression was used to identify recruitment methods that had the highest relative yield for subgroups of interest with covariate adjustments for clinic.

Results: The final sample of 599 participants (27% minority, 22% male) was recruited over a 19-month period of sustained efforts. About 10% of those who initially expressed interest via a screening website were randomized. The most common reason for ineligibility was already being obese (BMI >30 kg/m2). The top two methods for recruitment were mass mailing followed by email; together they were cited by 62% of those recruited. Television, radio, paid print advertising, flyers and community events each yielded fewer than 10% of study participants. Email was the most cost-effective method per study participant recruited.

Conclusions: These findings can guide future efforts to recruit young adults and for trials targeting weight gain prevention.

Trial registration: ClinicalTrials.gov NCT01183689 (registered 13 August 2010).

Show MeSH
Related in: MedlinePlus