Table 11.
Linear Regression of Major Summary Indices Against Selected Cannabinoids.
| Parameter |
Model |
|||||||
|---|---|---|---|---|---|---|---|---|
| Parameter | Estimate | Standard Error | T | Pr(>|t|) | Adusted R2 | F | df | P |
| Quartic-in-time models | ||||||||
| Additive models | ||||||||
| Majors2014~poly(Year, n=4)+Δ9-THC+CBD+CBN+THCV | ||||||||
| Δ9-THC | 0.8746 | 0.1535 | 5.699 | .0001 | 0.7077 | 32.48 | 1,12 | 9.9E-05 |
| PC1~poly(Year, n=4)+Δ9-THC+CBD+CBN+THCV | ||||||||
| Year | 2.5605 | 0.5875 | 4.358 | .0024 | 0.9582 | 60.67 | 5,8 | 3.8E-06 |
| (Year)^4 | −0.8531 | 0.2711 | −3.147 | .0137 | ||||
| (Year)^2 | −1.0638 | 0.4303 | −2.472 | .0386 | ||||
| CBN | 0.4179 | 0.1789 | 2.336 | .0477 | ||||
| Major_CVS~poly(Year, n=4)+Δ9-THC+CBD+CBN+THCV | ||||||||
| (Year)^4 | −1.5260 | 0.3572 | −4.273 | .0027 | 0.9149 | 28.97 | 5,8 | 6.4E-05 |
| (Year)^2 | −1.9670 | 0.5670 | −3.469 | .0085 | ||||
| Year | 2.3018 | 0.7741 | 2.974 | .0178 | ||||
| CBN | 0.5051 | 0.2357 | 2.143 | .0645 | ||||
| Majors2013~poly(Year, n=4)+Δ9-THC+CBD+CBN+THCV | ||||||||
| CBD | −1.3975 | 0.3085 | −4.530 | .0062 | 0.9718 | 60.04 | 7,5 | .0002 |
| THCV | 1.1978 | 0.2796 | 4.284 | .0078 | ||||
| (Year)^4 | 1.9973 | 0.4900 | 4.076 | .0096 | ||||
| (Year)^3 | −2.4039 | 0.6190 | −3.884 | .0116 | ||||
| (Year)^2 | −3.5165 | 1.0913 | −3.222 | .0234 | ||||
| CBN | 0.8580 | 0.2758 | 3.111 | .0265 | ||||
| Year | −8.0678 | 2.6757 | −3.015 | .0296 | ||||
| Interactive models | ||||||||
| PC1~poly(Year, n=4)*Δ9-THC+CBD+CBN+THCV | ||||||||
| Year: Δ9-THC | −2.1082 | 0.3168 | −6.655 | .0006 | 75.94 | 75.94 | 7,6 | 2.0E-05 |
| CBD | −0.3900 | 0.0713 | −5.469 | .0016 | ||||
| CBN | 0.5980 | 0.1536 | 3.894 | .0080 | ||||
| THCV | 0.4206 | 0.1444 | 2.914 | .0268 | ||||
| Majors2013~poly(Year, n=4)*LMCann+Tob+Opioids+Binge_Alcohol+Cocaine | ||||||||
| (Year)^3 | 4.5310 | 0.9640 | 4.700 | .0053 | 0.8206 | 11.29 | 4,5 | .0102 |
| Year | 3.0367 | 0.9432 | 3.219 | .0235 | ||||
| (Year)^2 | −2.9994 | 1.1589 | −2.588 | .0490 | ||||
| Majors2013~poly(Year, n=4)*Δ9-THC+CBD+CBN+THCV | ||||||||
| Δ9-THC | 3.7695 | 0.0983 | 38.354 | .0166 | 0.9999 | 14750.0 | 11,1 | .0064 |
| CBD | −1.2900 | 0.0356 | −36.203 | .0176 | ||||
| (Year)^4: Δ9-THC | 9.4066 | 0.2628 | 35.801 | .0178 | ||||
| Year: Δ9-THC | −31.1351 | 0.9101 | −34.211 | .0186 | ||||
| (Year)^4 | 23.1233 | 0.7273 | 31.791 | .0200 | ||||
| (Year)^2 | 40.8303 | 1.3204 | 30.923 | .0206 | ||||
| (Year)^3: Δ9-THC | −23.2475 | 0.8131 | −28.59 | .0223 | ||||
| CBN | 1.0334 | 0.0472 | 21.908 | .0290 | ||||
| Year | −4.7978 | 0.3662 | −13.103 | .0485 | ||||
Abbreviation: df, degrees of freedom.