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Table 1 Relevant global screening factors identified for the MACUSTAR study in qualitative evaluation ordered by estimated magnitude of impact on screening numbers

From: Challenges, facilitators and barriers to screening study participants in early disease stages-experience from the MACUSTAR study

Screening measures

Factors prioritized in qualitative interviews*

Other factors

All sites

Change of inclusion criteria (opening for individuals with unilateral intermediate disease) (#8)

Dissemination material (patient flyer, referral letter, study procedure flyers, sample visit schedules)

Increase of participant travel expenses reimbursement (#3)

Distribution of study newsletter

Investigator teleconferences (#6)

 

Investigator meetings (conferences) (#7)

Letter of appreciation for clinical sites at recruitment start

Increase of study newsletter frequency (monthly to biweekly) (#4)

Implementation of a clinical site questionnaire to identify unsolved issues

Regular coordination teleconferences with the project management and monitors (#5)

 

Single sites

 

Pre-screening lists

 

Individual contacts with investigators (e-mail, phone, in person)

 

Individual contacts with site coordinators

 

Appearing in the newsletter as a “top recruiter”

Interacting factors

Public holiday (#2)

Competitive recruitment

Reaching a high proportion of the initial “recruitment target” or exceeding this target (#9)

Communication of recruiting problems by individual sites

Successive initiation of screening activity (#1)

Problems with study devices at individual sites

Consortium core membership (#10)

 
  1. * only global factors that could be assigned to specific time periods were allowed
  2. Factors preceded by a # sign were considered relevant in the qualitative evaluation and are displayed in the ranking order obtained in the qualitative evaluation