Table 3.
Sample characteristics
| Variable | Overall | Placebo | Caffeine | |||||
|---|---|---|---|---|---|---|---|---|
| Sample Size | 200 | 100 | 100 | |||||
|
| ||||||||
| Age | 31.8 (12.9) | 29.8 (11.4) | 33.8 (14.0) | |||||
|
| ||||||||
| Male | 77 (38.5%) | 39 (39%) | 38 (38%) | |||||
| Female | 123 (61.5%) | 61 (61%) | 62 (62%) | |||||
|
| ||||||||
| Hispanic | 8 (4%) | 7 (7%) | 1 (1%) | |||||
|
| ||||||||
| White | 69 (34.5%) | 30 (30%) | 39 (39%) | |||||
| Black | 89 (44.5%) | 50 (50%) | 39 (39%) | |||||
| Other | 42 (21%) | 20 (20%) | 22 (22%) | |||||
|
| ||||||||
| High School/GED | 70 (35%) | 35 (35%) | 35 (35%) | |||||
| Associate’s | 23 (11.5%) | 13 (13%) | 10 (10%) | |||||
| Bachelor’s | 66 (33%) | 31 (31%) | 35 (35%) | |||||
| Master’s | 24 (12%) | 13 (13%) | 11 (11%) | |||||
| Doctorate/Professional | 17 (8.5%) | 8 (8%) | 9 (9%) | |||||
|
| ||||||||
| Current student | 119 (60.1%) | 69 (69%) | 50 (50%) | |||||
Note. Values are Mean (SD) or Frequency (%).