Table S4.

Estimated mean differences in IQ change between marijuana user groups (time-by-marijuana use interaction), controlling for other substance use

IQ subtestRFABMTFS
β (95% CI)Pβ (95% CI)P
Vocabulary−3.7 (−6.8 to −0.5)0.022−0.8 (−2.3 to 0.6)0.244
Information−0.7 (−2.3 to 0.9)0.399
Similarities−0.7 (−4.1 to 2.8)0.708
Block Design−0.2(−3.1 to 2.8)0.916−0.1 (−1.6 to 1.5)0.932
Matrix Reasoning1.3 (−2.2 to 4.8)0.471
Picture Arrangement−1.2 (−3.8 to 1.3)0.336
  • Models were adjusted for age, sex, race, zygosity, maximal binge drinking, other drug use, SES, and MTFS cohort. CI, confidence interval.