Table 3.
The Mean, Standard Deviation, Range, and Ratio (Cannabis:Tobacco) of the Estimated Amount and Actual Weight of Cannabis and Tobacco That Participants Rolled into a Joint During the Baseline Session and After Each Drug Condition
| Cannabis in joint (g) | Tobacco in joint (g) | Ratio of cannabis to tobaccoa | ||||
|---|---|---|---|---|---|---|
| Estimated | Actual | Estimated | Actual | Estimated | Actual | |
| Baseline | ||||||
| Mean | 0.28 | 0.14** | 0.43 | 0.35 | 0.81:1 | 0.53:1 |
| SD | 0.23 | 0.12 | 0.25 | 0.16 | ||
| Range | 0.02–0.90 | 0.00–0.44 | 0.10–1.00 | 0.09–0.74 | 0.10:1–3.00:1 | 0.05:1–1.42:1 |
| Placebo | ||||||
| Mean | 0.32 | 0.17** | 0.38 | 0.33 | 1.12:1 | 0.63:1 |
| SD | 0.29 | 0.13 | 0.26 | 0.17 | ||
| Range | 0.00–1.25 | 0.00–0.45 | 0.00–1.00 | 0.00–0.74 | 0.05:1–3.50:1 | 0.05:1–2.00:1 |
| TOB | ||||||
| Mean | 0.28 | 0.14* | 0.34 | 0.27 | 1.22:1 | 0.54:1 |
| SD | 0.28 | 0.10 | 0.26 | 0.12 | ||
| Range | 0.40–1.00 | 0.02–0.40 | 0.00–0.90 | 0.00–0.46 | 0.11:1–4.00:1 | 0.11:1–1.74:1 |
| CAN | ||||||
| Mean | 0.25 | 0.11*** | 0.24 | 0.19 | 1.23:1 | 0.70:1 |
| SD | 0.20 | 0.12 | 0.20 | 0.14 | ||
| Range | 0.00–0.70 | 0.00–0.41 | 0.00–0.60 | 0.00–0.49 | 0.1:1 3.33:1 | 0.05:1–2.33:1 |
| CAN+TOB | ||||||
| Mean | 0.32 | 0.12* | 0.22 | 0.19 | 1.20:1 | 1.11:1 |
| SD | 0.49 | 0.19 | 0.20 | 0.18 | ||
| Range | 0.00–2.00 | 0.00–0.59 | 0.00–0.60 | 0.00–0.62 | 0.10:1–3.00–1 | 0.02:1–5.50:1 |
Bold text represents significant differences between estimated and actual weight. This was the case for cannabis only, and not tobacco.
a
N's range 17–24 as participants were excluded if their response was 0 for either cannabis or tobacco (as a ratio cannot be calculated).
***
p≤0.001, **p≤0.01, *p≤0.05.