Exploratory randomized controlled trial evaluating the impact of a waiting list control design
Cunningham JA;Kypri K;McCambridge J;;
BMC medical research methodology2013Vol. 13pp. -
171
ja2013bmcexploratory
Abstract
Trials with waiting list control conditions may overestimate treatment effects, though the extent of any such bias appears likely to vary between study populations. Arguably they should only be used where this threat to valid inference has been carefully assessed.