imap_strat: Stratified summary data for the IMAP study

Description References


Data set is from the Improving Management of Abnormal Pap Smears study, which 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.

In this data set, patients are stratified according to their baseline score on the six-item abbreviated Spielberger State-Trait Anxiety Inventory (STAI). This assessment is used to assess the level of anxiety experienced by patients. Stratum 1 includes patients with low STAI scores (<=10 on STAI averaged across whole study), which indicates low levels of anxiety. Stratum 2 includes patients with high STAI scores (>10), indicating higher levels of anxiety. The data set provides mean, standard deviation and sample sizes of the SF36 outcome for each treatment in both the choice and random arms for both strata.


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)

Marteau TM, Bekker H. (1992) "The development of a six-item short-form of the state scale of the Spielberger State-Trait Anxiety Inventory (STAI)." Br J Clin Psychol, 31:301-306. (PubMed)

preference documentation built on Nov. 29, 2017, 1:01 a.m.