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01.02.2012 | Ausgabe 2/2012

Maternal and Child Health Journal 2/2012

Recruitment of Healthy First-Trimester Pregnant Women: Lessons From the Chemicals, Health & Pregnancy Study (CHirP)

Maternal and Child Health Journal > Ausgabe 2/2012
Glenys M. Webster, Kay Teschke, Patricia A. Janssen
Wichtige Hinweise

Electronic supplementary material

The online version of this article (doi:10.​1007/​s10995-010-0739-8) contains supplementary material, which is available to authorized users.


To describe and evaluate recruitment techniques used to enroll 152 healthy pregnant women fewer than 15 weeks gestation into a prospective study of environmental chemical exposure during pregnancy. Posters, a website, online and print advertising, recruitment emails, media coverage, recruitment from clinic waiting rooms, networking within the pregnancy community and presenting a study booth at baby “trade shows” were used to advertise the study. Participants had to meet a strict set of eligibility criteria, and were asked to donate two-second-trimester blood samples, complete two questionnaires, have samples of air, dust, lint and tap water collected from their homes, and donate a cord blood sample at delivery. Over 17 months, 171 women enrolled (49% of initial contacts, and 99% of all eligible women) and 152 women completed the study (89% retention). Total recruitment costs were approximately $400 Cdn per final participant. Posters, study booth presentations and online advertising generated the most inquiries about the study. Word of mouth, referral from another study and direct email were the most cost-effective strategies. Not surprisingly, the recruited study population was less ethnically diverse, more affluent and more educated than the background population of pregnant women in Vancouver. A combination of passive and active recruitment techniques were successful for recruiting healthy women in roughly the first trimester of pregnancy (<15 weeks gestation). While a convenience sample of women is suitable for our study questions, additional strategies may be required to recruit a more representative pregnant population in future studies.

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Supplemental Digital Content 1: Recruitment poster (PDF 291 kb)
Supplemental Digital Content 2: Recruitment flyer (PDF 302 kb)
Supplemental Digital Content 3: Photo of the CHirP study recruitment booth (JPEG 699 kb)
Supplemental Digital Content 4: Consent form for the main part of the CHirP study (DOC 189 kb)
Supplemental Digital Content 5: Consent form for the optional tissue banking part of the CHirP study (DOC 175 kb)
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