imap: Data from the IMAP study

Description References


The “Improving Management of Abnormal Pap Smears” study used a two-stage randomized preference trial design to evaluate psychosocial outcomes in women found to have atypical cells in a Pap Smear. Two systems for managing the atypical cells were tested (repeated Pap smears or HCV triage) and a doubly randomized design was used to evaluate the role of patient preference. The data set provides mean, standard deviation and sample sizes of the SF36 outcome for each treatment in both the choice and random arms.

Three data sets are provided with the preference package based on the IMAP study. The first, imap_summary provides summary statistics of the entire trial. The second imap_summary_stratified, summary statistics of the study per strata. The third imap is a resampled version of the individual level data including stratification. Each of these data sets are compatible with the analysis functions fit_preference_summary, fit_preference, and preference, provided in this package. The examples sections in the documentation illustrate their use.


McCaffery et al. (2010) "Psychosocial outcomes of three triage methods for the management of borderline abnormal cervical smears: an open randomised trial." BMJ, 340:b4491. (PubMed)

McCaffery et al. (2011) "Determining the Impact of Informed Choice: Separating Treatment Effects from the Effects of Choice and Selection in Randomized Trials." Med Decis Making, 31(2):229-236. (PubMed)

preference documentation built on Nov. 30, 2018, 4:22 p.m.