What is controlled for in placebo-controlled trials?

Editorial

Roger B Fillingim et al. Mayo Clin Proc. 2005 Sep.

. 2005 Sep;80(9):1119-21.

doi: 10.4065/80.9.1119.

No abstract available

Comment on

Botulinum toxin type A for the prophylactic treatment of chronic daily headache: a randomized, double-blind, placebo-controlled trial.
Silberstein SD, Stark SR, Lucas SM, Christie SN, Degryse RE, Turkel CC; BoNTA-039 Study Group. Silberstein SD, et al. Mayo Clin Proc. 2005 Sep;80(9):1126-37. doi: 10.4065/80.9.1126. Mayo Clin Proc. 2005. PMID: 16178492 Clinical Trial.
Effect of magnetic vs sham-magnetic insoles on nonspecific foot pain in the workplace: a randomized, double-blind, placebo-controlled trial.
Winemiller MH, Billow RG, Laskowski ER, Harmsen WS. Winemiller MH, et al. Mayo Clin Proc. 2005 Sep;80(9):1138-45. doi: 10.4065/80.9.1138. Mayo Clin Proc. 2005. PMID: 16178493 Clinical Trial.