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. 2023 Feb 6;60:101209. doi: 10.1016/j.dcn.2023.101209

Table 3.

Results of mixed-effects model with time point, cannabis exposure during pregnancy, and their interactions as independent variables for the brain volumes.

Unstandardized
Standardized
R squared p value FDR p-value
coefficients 95% CI
coefficients 95% CI
lower upper lower upper
Without covariate
Intracranial volume
Time 29,683.910 28,814.313 30,553.508 0.101 0.098 0.104 0.011 < .001 < .001
Cannabis -19,360.978 -30,063.711 -8658.244 -0.035 -0.052 -0.018 < .001 0.001
Time: Cannabis -4938.278 -8470.297 -1406.259 -0.004 -0.007 -0.001 0.006 0.008
White matter volume
Time 5869.002 5590.628 6147.376 0.057 0.055 0.060 0.639 < .001 < .001
Cannabis -2637.851 -4638.176 -637.525 -0.011 -0.020 -0.002 0.01 0.012
Time: Cannabis 582.143 -485.575 1649.861 0.001 -0.001 0.004 0.285 0.285
Gray matter volume
Time -20,796.640 -21,232.186 -20,361.094 -0.152 -0.155 -0.149 0.675 < .001 < .001
Cannabis -6529.182 -8947.759 -4110.606 -0.021 -0.029 -0.012 < .001 < .001
Time: Cannabis 1262.279 -443.614 2968.171 0.002 -0.001 0.005 0.147 0.162
With covariate
Intracranial volume
Time 29,939.517 28,904.834 30,974.200 0.102 0.098 0.105 0.271 < .001 < .001
Cannabis 2688.782 -11,613.667 16,991.232 -0.000 -0.023 0.023 0.713 0.773
Time: Cannabis -6338.309 -11,066.588 -1610.029 -0.005 -0.009 -0.001 0.009 0.019
White matter volume
Time 7729.754 7436.208 8023.300 0.075 0.072 0.078 0.616 < .001 < .001
Cannabis -3036.717 -6458.079 384.646 -0.014 -0.029 0.002 0.082 0.148
Time: Cannabis 175.226 -1013.692 1364.144 0.000 -0.002 0.003 0.773 0.773
Gray matter volume
Time -19,359.974 -19,848.143 -18,871.805 -0.141 -0.145 -0.138 0.727 < .001 < .001
Cannabis 2839.766 -760.075 6439.608 0.012 -0.001 0.024 0.122 0.183
Time: Cannabis 1035.433 -1065.623 3136.489 0.002 -0.002 0.005 0.334 0.43

Note. The FDR was corrected for the three (Time, Cannabis, and Time: Cannabis) x three (ICV, WMV, and GMV).