mardi 4 novembre 2014

IQ before and after cannabis use: is it sufficient?

Persistence of regular cannabis useN% maleAge 7–13 y full-scale IQAge 38 y full-scale IQΔ IQ effect size*
Never used24238.8499.84 (14.39)100.64 (15.25)0.05
Used, never regularly50850.59102.27 (13.59)101.24 (14.81)−0.07
Used regularly at 1 wave4772.34101.42 (14.41)98.45 (14.89)−0.20
Used regularly at 2 waves3663.8995.28 (10.74)93.26 (11.44)−0.13
Used regularly at 3+ waves4178.0596.00 (16.06)90.77 (13.88)−0.35

http://www.pnas.org/content/109/40/E2657/1/T6.expansion.html

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