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. Author manuscript; available in PMC: 2013 Apr 21.
Published in final edited form as: Stat Med. 2011 Feb 22;31(7):606–618. doi: 10.1002/sim.4034

Table 2.

Masking/blinding methods used

Masking/Blinding
Methods
Efficacy Study Effectiveness Study Unspecified
Study
Total
Patients only 15 (33%) 9 (20%) 7 (36%) 31 (29%)
Patients + Evaluators 14 (31%) 9 (20%) 2 (11%) 25 (23%)
Patients + Practitioners
(Double Blinding)
3 (7%) 2 (5%) 0 5 (5%)
Evaluators only 4 (9%) 5 (11%) 0 9 (8%)
No Masking/Blinding 1 (2%) 2 (5%) 0 3 (3%)
Unclear 8 (18%) 17 (39%) 10 (53%) 35 (32%)
Total 45 (100%) 44 (100%) 19 (100%) 108 (100%)