Figure 3

Difference between a percentage placebo effect and a standardised difference (Cohen's D ). (a) Alzheimer Disease Assessment Scale - cognitive subscale (ADAS-cog) 50% placebo effect large decline. (b) ADAS-cog 50% standardised difference large decline. (c) ADAS-cog 50% placebo effect small decline. (d) ADAS-cog 50% standardised difference small decline. PBO, placebo; TRT, treatment.