Table 2.
Relations between study week (independent variable) and mean anxiety, depression, and cannabis-related problem scores (dependent variables) across classes and class solutions
| HADS-A | HADS-D | MPS | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Week −1 vs. Week 4 | Week −1 vs. Week 8 | Week −1 vs. Week 12 | Week −1vs. Week 4 | Week −1 vs. Week 8 | Week −1 vs. Week 12 | Week −1vs. Week 4 | Week −1 vs. Week 8 | Week −1 vs. Week 12 | |||||||||||
| Solution | Coef | 95% CI | Coef | 95% CI | Coef | 95% CI | Coef | 95% CI | Coef | 95% CI | Coef | 95% CI | Coef | 95% CI | Coef | 95% CI | Coef | 95% CI | |
| Two-Class | Class 1 | −0.99 | (−1.53, −0.45) | −1.09 | (−1.70, −0.47) | −1.59 | (−2.22, −0.95) | −0.93 | (−1.39, −0.47) | −0.70 | (−1.27, −0.13) | −1.36 | (−1.98, −0.75) | −3.09 | (−3.67, −2.50) | −4.80 | (−5.43, −4.17) | −5.00 | (−5.66, −4.34) |
| Class 2 | −0.77 | (−1.46, −0.08) | 0.07 | (−0.75, 0.90) | −0.63 | (−1.42, 0.16) | −0.73 | (−1.29, −0.17) | −0.54 | (−1.25, 0.17) | −0.48 | (−1.27, 0.31) | −2.26 | (−3.02, −1.50) | −2.35 | (−3.11, −1.59) | −2.99 | (−3.80, −2.18) | |
| Three-Class | Class 1 | −1.03 | (−1.58, −0.48) | −1.15 | (−1.77, −0.53) | −1.64 | (−2.29, −0.99) | −0.87 | (−1.33, −0.41) | −0.65 | (−1.22, −0.08) | −1.35 | (−1.97, −0.73) | −3.07 | (−3.66, −2.48) | −4.83 | (−5.47, −4.18) | −5.02 | (−5.69, −4.34) |
| Class 2 | −0.64 | (−1.33, 0.05) | 0.11 | (−0.81, 1.03) | −0.43 | (−1.28, 0.41) | −0.48 | (−1.03, 0.07) | −0.29 | (−1.04, 0.47) | −0.34 | (−1.12, 0.45) | −2.21 | (−3.04, −1.38) | −2.39 | (−3.21, −1.56) | −2.91 | (−3.81, −2.01) | |
| Class 3 | −0.84 | (−2.71, 1.03) | 0.69 | (−0.80, 2.17) | −1.17 | (−3.16, 0.82) | −2.04 | (−3.60, −0.48) | −1.63 | (−3.26, 0.01) | −0.82 | (−2.95, 1.31) | −2.58 | (−4.20, −0.95) | −2.20 | (−3.92, −0.48) | −3.36 | (−5.01, −1.72) | |
| Four-Class | Class 1 | −1.01 | (−1.57, −0.46) | −1.11 | (−1.73, −0.48) | −1.61 | (−2.26, −0.96) | −0.84 | (−1.30, −0.37) | −0.61 | (−1.19, −0.03) | −1.31 | (−1.93, −0.68) | −3.07 | (−3.66, −2.47) | −4.80 | (−5.45, −4.15) | −4.98 | (−5.66, −4.29) |
| Class 2 | −0.67 | (−1.36, 0.03) | 0.09 | (−0.85, 1.02) | −0.54 | (−1.39, 0.30) | −0.50 | (−1.05, 0.05) | −0.31 | (−1.06, 0.45) | −0.41 | (−1.20, 0.38) | −2.25 | (−3.09, −1.42) | −2.44 | (−3.26, −1.61) | −3.02 | (−3.91, −2.13) | |
| Class 3 | −0.49 | (−2.24, 1.26) | 1.26 | (0.01, 2.50) | −0.24 | (−2.23, 1.75) | −1.51 | (−2.91, −0.10) | −0.76 | (−2.22, 0.70) | 0.45 | (−1.55, 2.45) | −2.04 | (−3.49, −0.58) | −1.36 | (−2.85, 0.14) | −2.08 | (−3.52, −0.63) | |
| Class 4 | 0.07 | (−2.94, 3.07) | −2.19 | (−4.73, 0.36) | −1.69 | (−5.38, 2.01) | −1.34 | (−3.49, 0.80) | −3.09 | (−5.24, −0.95) | −3.59 | (−5.04, −2.14) | −2.58 | (−5.78, 0.62) | −5.83 | (−7.85, −3.81) | −6.58 | (−8.97, −4.19) | |
| Five-Class | Class 1 | −0.92 | (−1.61, −0.23) | −0.75 | (−1.50, 0.01) | −1.55 | (−2.33, −0.76) | −0.82 | (−1.42, −0.22) | −0.58 | (−1.27, 0.11) | −1.13 | (−1.90, −0.35) | −3.50 | (−4.24, −2.75) | −5.44 | (−6.20, −4.68) | −5.37 | (−6.19, −4.56) |
| Class 2 | −0.90 | (−1.68, −0.12) | 0.38 | (−0.68, 1.45) | −0.43 | (−1.40, 0.53) | −0.43 | (−1.04, 0.18) | −0.06 | (−0.89, 0.78) | −0.23 | (−1.16, 0.69) | −2.17 | (−3.10, −1.25) | −2.41 | (−3.33, −1.48) | −2.93 | (−3.94, −1.91) | |
| Class 3 | −0.33 | (−2.18, 1.52) | 1.59 | (0.46, 2.72) | −0.44 | (−2.40, 1.53) | −1.37 | (−2.82, 0.08) | −0.54 | (−2.05, 0.96) | 0.41 | (−1.62, 2.43) | −1.96 | (−3.50, −0.43) | −1.26 | (−2.88, 0.36) | −2.32 | (−3.77, −0.88) | |
| Class 4 | 0.07 | (−2.94, 3.07) | −2.19 | (−4.73, 0.36) | −1.69 | (−5.38, 2.01) | −1.34 | (−3.49, 0.80) | −3.09 | (−5.24, −0.95) | −3.59 | (−5.04, −2.14) | −2.58 | (−5.78, 0.62) | −5.83 | (−7.85, −3.81) | −6.58 | (−8.97, −4.19) | |
| Class 5 | −0.87 | (−1.70, −0.04) | −1.69 | (−2.65, −0.72) | −1.39 | (−2.40, −0.38) | −0.93 | (−1.55, −0.31) | −0.79 | (−1.74, 0.16) | −1.50 | (−2.35, −0.65) | −2.21 | (−3.09, −1.32) | −2.99 | (−4.06, −1.91) | −3.71 | (−4.80, −2.61) | |
HADS-A = Anxiety subscale of Hospital Anxiety and Depression Scale; HADS-D = Depression subscale of Hospital Anxiety and Depression Scale; MPS = Marijuana Problem Scale
Models are linear regression with cluster-robust standard errors; Coefficients are unstandardized; Models are adjusted for treatment status, age, race, gender.