Table 1.
Demographic data collected at the first time point.
| Total | 654 | |
|---|---|---|
| Gender | Male | 485 (74.2%) |
| Female | 165 (25.2%) | |
| Other | 4 (0.6%) | |
| Age | 28.9 ±10.4 | |
| Educational level | Left school before age 16 without qualifications | 8 (1.2%) |
| Some high school/GCSE level (in UK) | 45 (6.9%) | |
| High school diploma/A-level education (in UK) | 97 (14.8%) | |
| Some university (or equivalent) | 179 (27.4%) | |
| Bachelor's degree (or equivalent) | 193 (29.5%) | |
| Post-graduate degree (e.g., Masters or Doctorate) | 132 (20.2%) | |
| Employment status | Student | 256 (39.1%) |
| Unemployed | 53 (8.1%) | |
| Part-time job | 98 (15.0%) | |
| Full-time job | 237 (36.2%) | |
| Retired | 10 (1.5%) | |
| Nationality | United States | 199 (30.4%) |
| United Kingdom | 128 (19.6%) | |
| Denmark | 60 (9.2%) | |
| Germany | 32 (4.9%) | |
| Canada | 32 (4.9%) | |
| Other (50 in total) | 203 (31.0%) | |
| Psychiatric history | Ever been diagnosed with at least one psychiatric illness in the pasta | 214 (32.7%) |
| Never been diagnosed with a psychiatric illness | 381 (67.3%) | |
| Previous psychedelic drug use | Never (psychedelic naïve) | 62 (9.5%) |
| Once | 40 (6.1%) | |
| 2–5 times | 148 (22.6%) | |
| 6–20 times | 215 (32.9%) | |
| More than 21 times | 189 (28.9%) |
Means ± standard deviations and absolute frequencies are shown. Numbers in parenthesis indicate the percentages corresponding to the absolute frequencies.
a
At least one of the following psychiatric illnesses: major depressive disorder, bipolar disorder, schizophrenia, anxiety disorder, substance abuse disorder, alcohol dependence, hallucinogen persisting perception disorder, psychotic disorder, attention deficit hyperactivity disorder, obsessive compulsive disorder, and eating disorder.