Table 1.
Demographic data and cannabis smoking histories for 11 frequent and 9 occasional smokers.
| Participant | Sex | Age (years) |
Racea | BMI (kg/m2) |
Age at first useb |
Lifetime Years Smokedb |
Cannabis Intake Frequencyb |
Time between last use and admissionc |
Number of days used in last 14c |
Average joint or joint equivalent per smoking occasionc |
|---|---|---|---|---|---|---|---|---|---|---|
| Frequent Smokers | ||||||||||
| A | M | 21 | AA | 26.5 | 16 | 5 | Daily | 17.2 h | 14 | 5 |
| B | M | 22 | AA, U | 31.0 | 15 | 7 | Daily | 19.3 h | 10 | 4 |
| C | M | 19 | AA | 19.8 | 13 | 6 | Daily | 18.7 h | 14 | 4 |
| D | F | 23 | AA | 31.9 | 13 | 10 | Daily | 7.9 h | 14 | 10 |
| E | M | 38 | AA | 32.2 | 12 | 26 | Daily | 2.4 h | 14 | 15 |
| F | F | 29 | AA | 31.0 | 11 | 18 | Daily | 1.9 h | 14 | 20 |
| G | M | 38 | AA | 22.0 | 16 | 22 | Daily | 2.1 h | 14 | 7 |
| H | M | 34 | AA | 23.0 | 14 | 20 | 5x/week | 239.7 hd | 2d | 2d |
| I | M | 21 | AA | 25.0 | 11 | 10 | Daily | 0.7 h | 14 | 5 |
| J | M | 25 | AA | 19.0 | 13 | 12 | 5x/week | 5.8 h | 14 | 2 |
| K | M | 31 | AA | 16.8 | 15 | 16 | 2–3x/weeke | 5.1 he | 4e | 2.5e |
| Mean | 27.4 | f | 25.3 | 13.5f | 13.9 | 8.4 h | 13.6f | 8.0f | ||
| SD | 6.9 | 5.6 | 1.8 | 6.9 | 7.8 h | 1.3 | 6.0 | |||
| Median | 25.3 | 25.0 | 13.0 | 12.3 | 5.8 h | 14.0 | 5.0 | |||
| Occasional Smokers | ||||||||||
| L | M | 24 | AA | 36.3 | 17 | 7 | 2x/month | 1.4 days | 3 | 2 |
| M | M | 21 | AA | 23.0 | 13 | 8 | 2x/week | 0.7 days | 4 | 2 |
| N | M | 25 | W | 24.2 | 21 | 4 | 2x/week | 13.0 days | 1 | 3 |
| O | M | 40 | W | 28.3 | 18 | 22 | 2x/week | 30.7 days | 0 | 2 |
| P | F | 46 | AA | 31.0 | 26 | 20 | 2x/week | 0.4 days | 4 | 4 |
| Q | M | 33 | AA | 30.7 | 16 | 17 | 2x/month | 22.8 days | 0 | 3 |
| R | F | 22 | W | 22.0 | 16 | 6 | 2x/week | 1.7 days | 4 | 1 |
| S | F | 22 | W | 23.0 | 14 | 8 | 2x/week | 1.1 days | 10 | 2 |
| T | M | 31 | W | 21.7 | 22 | 9 | 1–2x/week | 1.8 days | 2 | 2 |
| Mean | 29.4 | f | 26.7 | 18.1f | 11.3 | 8.2 days | 3.1f | 2.3f | ||
| SD | 8.6 | 5.1 | 4.2 | 6.3 | 11.4 days | 3.1 | 0.9 | |||
| Median | 24.9 | 24.2 | 17.0 | 8.5 | 1.7 days | 3.0 | 2.0 | |||
a
AA, African American; W, white; U, unknown
b
Data collected during screening
c
Data collected on admission to Session 1
d
Self-reported data on admission inconsistent with data received at screening. Data excluded from statistics.
e
Self-reported data inconsistent with biological sample concentrations. Data excluded from statistics.
f
Significant difference between groups (p<0.05)