Table 4.
Zero-Inflated Poisson Regression Models of Marijuana Use Frequency Categories by Individual Subject Intercepts and Slopes from Multilevel Linear Models (MLM) of Orbital Frontal Cortex (OFC) Volume Residuals and OFC Thickness by Time-Varying CDI-C Anhedonia (N=137)
Estimate | SE | t | p | |
---|---|---|---|---|
Zero-inflated: marijuana abstinence | ||||
Intercept | −144.9453 | 2.6622 | −54.45 | <0.0001 |
Intercept from MLM of OFC volume residuals | −92.7248 | 174.4580 | −0.53 | 0.5951 |
Caucasian race | 358.0357 | 153.6707 | 2.33 | 0.0198 |
Male gender | −156.1959 | 422.8904 | −0.37 | 0.7119 |
Age at last assessment | −17.2575 | 50.3923 | −0.34 | 0.7320 |
Continuous: frequency of use | ||||
Intercept | −6.3711 | 2.2635 | −2.81 | 0.0049 |
Intercept from MLM of OFC volume residuals | −0.1871 | 0.0982 | −1.91 | 0.0568 |
Caucasian race | 0.3343 | 0.3160 | 1.06 | 0.2901 |
Male gender | −0.1413 | 0.3121 | −0.45 | 0.6507 |
Age at last assessment | 0.3381 | 0.1394 | 2.43 | 0.0153 |
| ||||
Zero-inflated: marijuana abstinence | ||||
Intercept | 8631.4828 | 96.6595 | 89.30 | <0.0001 |
Slope from MLM of OFC volume residuals | 2021.8787 | 610.7295 | 3.31 | 0.0009 |
Caucasian race | 984.1515 | 721.9290 | 1.36 | 0.1728 |
Male gender | 941.9319 | 743.8689 | 1.27 | 0.2054 |
Age at last assessment | −677.0268 | 46.0206 | −14.71 | <0.0001 |
Continuous: frequency of use | ||||
Intercept | −5.5617 | 2.4598 | −2.26 | 0.0238 |
Slope from MLM of OFC volume residuals | −0.8607 | 1.7057 | −0.50 | 0.6138 |
Caucasian race | 0.0247 | 0.2817 | 0.09 | 0.9301 |
Male gender | 0.3570 | 0.2889 | 1.24 | 0.2166 |
Age at last assessment | 0.2735 | 0.1519 | 1.80 | 0.0718 |
| ||||
Zero-inflated: marijuana abstinence | ||||
Intercept | −977.6172 | 201.3198 | −4.86 | <0.0001 |
Intercept from MLM of OFC thickness | 262.9481 | 581.2684 | 0.45 | 0.6510 |
Caucasian race | −385.6956 | 48.2515 | −7.99 | <0.0001 |
Male gender | −62.2419 | 364.4789 | −0.17 | 0.8644 |
Age at last assessment | −119.4254 | 420.1010 | −0.28 | 0.7762 |
Continuous: frequency of use | ||||
Intercept | 2.1503 | 4.5573 | 0.47 | 0.6370 |
Intercept from MLM of OFC thickness | −0.6201 | 0.3927 | −1.58 | 0.1143 |
Caucasian race | −0.3023 | 0.2952 | −1.02 | 0.3058 |
Male gender | 0.2429 | 0.2893 | 0.84 | 0.4011 |
Age at last assessment | 0.2339 | 0.1513 | 1.55 | 0.1222 |
| ||||
Zero-inflated: marijuana abstinence | ||||
Intercept | −1445.989 | 0.0404 | −35772 | <0.0001 |
Slope from MLM of OFC thickness | −12198 | 0.0069 | 0.00 | <0.0001 |
Caucasian race | 82.9762 | 0.0404 | 2052.86 | <0.0001 |
Male gender | 119.6468 | 0.0404 | 2960.08 | <0.0001 |
Age at last assessment | −48.6716 | 0.6872 | −70.83 | <0.0001 |
Continuous: frequency of use | ||||
Intercept | −15.3208 | 3.5677 | −4.29 | <0.0001 |
Slope from MLM of OFC thickness | −54.2207 | 17.8396 | −3.04 | 0.0024 |
Caucasian race | −0.0296 | 0.2821 | −0.10 | 0.9165 |
Male gender | 0.4101 | 0.2912 | 1.41 | 0.1590 |
Age at last assessment | 0.3583 | 0.1444 | 2.48 | 0.0131 |