TY - JOUR
T1 - Predictors of participant retention in infertility treatment trials
AU - Kuang, Hongying
AU - Jin, Susan
AU - Thomas, Tracey
AU - Engmann, Lawrence
AU - Hansen, Karl R.
AU - Coutifaris, Christos
AU - Casson, Peter
AU - Christman, Gregory
AU - Alvero, Ruben
AU - Santoro, Nanette
AU - Eisenberg, Esther
AU - Diamond, Michael Peter
AU - Legro, Richard S.
AU - Zhang, Heping
N1 - Publisher Copyright:
© 2015 American Society for Reproductive Medicine.
PY - 2015/11
Y1 - 2015/11
N2 - Objective To identify variables associated with retention (or dropout) in infertility clinical trials. Retention of subjects in randomized controlled clinical trials (RCTs) has received considerable attention, but there have been few consistent findings. Design Secondary analysis of data from RCTs. Setting Academic medical centers. Patient(s) Women with polycystic ovary syndrome (PCOS) or couples with unexplained infertility, aged 18-40 years. Intervention(s) This study is not an intervention study, but the patients in the original RCTs were treated with any or combination of metformin, clomiphene citrate (CC), letrozole, and gonadotropins. Main Outcome Measure(s) Successful retention versus dropout during the RCTs. Result(s) Race, ethnicity, body mass index (BMI), insurance coverage, history of smoking, and history of alcohol use were significantly associated with retention whether they were considered in bivariate analyses or a multivariable logistic model. Specifically, white race, higher income, having graduate degrees, normal weight, better insurance coverage, nonsmokers, and those who reported current use of alcohol at the start of the trial, had higher retention rates. Conclusion(s) We identified several additive and persistent predictors of retention that can be used to guide the conduct of RCTs and improve the retention rate. Given the limitation of our association analysis, methodologically sound and theoretically grounded research are warranted so that high quality data can be collected to improve our understanding on the causes of dropout. Clinical Trial Registration Number NCT00068861 (PPCOS-I), NCT00719186 (PPCOS-II), and NCT01044862 (AMIGOS).
AB - Objective To identify variables associated with retention (or dropout) in infertility clinical trials. Retention of subjects in randomized controlled clinical trials (RCTs) has received considerable attention, but there have been few consistent findings. Design Secondary analysis of data from RCTs. Setting Academic medical centers. Patient(s) Women with polycystic ovary syndrome (PCOS) or couples with unexplained infertility, aged 18-40 years. Intervention(s) This study is not an intervention study, but the patients in the original RCTs were treated with any or combination of metformin, clomiphene citrate (CC), letrozole, and gonadotropins. Main Outcome Measure(s) Successful retention versus dropout during the RCTs. Result(s) Race, ethnicity, body mass index (BMI), insurance coverage, history of smoking, and history of alcohol use were significantly associated with retention whether they were considered in bivariate analyses or a multivariable logistic model. Specifically, white race, higher income, having graduate degrees, normal weight, better insurance coverage, nonsmokers, and those who reported current use of alcohol at the start of the trial, had higher retention rates. Conclusion(s) We identified several additive and persistent predictors of retention that can be used to guide the conduct of RCTs and improve the retention rate. Given the limitation of our association analysis, methodologically sound and theoretically grounded research are warranted so that high quality data can be collected to improve our understanding on the causes of dropout. Clinical Trial Registration Number NCT00068861 (PPCOS-I), NCT00719186 (PPCOS-II), and NCT01044862 (AMIGOS).
KW - Randomized controlled clinical trial
KW - dropout
KW - logistic regression
KW - retention
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U2 - 10.1016/j.fertnstert.2015.08.001
DO - 10.1016/j.fertnstert.2015.08.001
M3 - Article
C2 - 26354094
AN - SCOPUS:84945976762
SN - 0015-0282
VL - 104
SP - 1236-1243.e2
JO - Fertility and sterility
JF - Fertility and sterility
IS - 5
ER -