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. Author manuscript; available in PMC: 2012 Dec 1.
Published in final edited form as: Psychopharmacology (Berl). 2011 Jun 15;218(4):649–665. doi: 10.1007/s00213-011-2358-5

Table 5.

Percentage of volunteers endorsing specific outcomes on four persisting effects items 1 month and 14 months after sessions*

Questionnaire Items 1 Month after Sessions 14 Month
Follow-up
(20 or 30
mg/70 kg)**
Psilocybin Dose (mg/70 kg)
0 5 10 20 30 20 or 30
How personally meaningful was the experience?
  Single most meaningful experience of life 0.0 0.0 5.6 16.7 33.3 44.4 38.9
  Top 5 most meaningful, including single most 0.0 11.1 33.3 77.8 61.1 77.8 94.4
How spiritually significant was the experience?
  Single most spiritually significant experience of life 0.0 0.0 5.6 27.8 44.4 61.1 44.4
  Top 5 most spiritually significant, including single most 11.1 11.1 44.4 66.7 77.8 83.3 94.4
Did the experience change your sense of well-being or
    life satisfaction?
  Increased well-being/life satisfaction (very much) 5.6 27.8 38.9 72.2 55.6 77.8 61.1
  Increased well-being/life satisfaction (moderately or very much) 38.9 55.6 72.2 83.3 88.9 94.4 83.3
Your behavior changed in ways you would consider positive since
  the experience.
  Positive behavioral change (strong or extreme) 22.2 16.7 50.0 38.9 55.6 55.6 44.4
  Positive behavioral change (moderate, strong or extreme) 33.3 50.0 61.1 61.1 88.9 88.9 88.9
*

Data in table show the percentage of volunteers endorsing the specific outcome

Data in these columns are the percentage of volunteers endorsing the specific outcome 1 month after the indicated dose of psilocybin; within the same row for these columns, bold font indicates significant difference in pair-wise comparisons to 0 mg/70 kg (Cochran’s Q showed p<.001 for all variables; planned comparisons performed with Wald test; see Methods for details)

Data in this column are the percentage of volunteers endorsing the specific outcome 1 month after either or both the 20 and 30 mg/70 dose sessions; bold font indicates significant difference in pair-wise comparisons to 0 mg/70 kg (Cochran’s Q showed p<.05 for all variables; planned comparisons performed with Wald test; see Methods for details)

**

Data in this column are the percentage of volunteers at 14 month follow-up endorsing the specific outcome with respect to experiences during either or both the 20 and 30 mg/70 kg dose sessions (see Methods); each value in this column was significantly greater than the value at 0 mg/70 kg (as indicated by bold font) but was not significantly different from the value at 20 or 30 mg/kg at 1 month (Cochran’s Q showed p<.05 for all variables; planned comparisons performed with Wald test; see Methods for details)