Table 3.

First Trimester Marijuana Exposure by Frequency of Offspring Marijuana Use at 22 Years.

	Offspring Frequency of Marijuana Use
First Trimester Maternal Marijuana Use	No Use (n=294)	Using less than three times per week (n=173)	Using three times per week or more (n=122)	p-valued	Effect sizee
Nonea (n, %)	194 (66)	99 (57)	54 (44)
Light to moderateb (n, %)	71 (24)	50 (29)	44 (36)	0.001	0.123
Heavyc (n, %)	29 (10)	24 (14)	24 (20)

^aZero joints per day

^bLess than one joint per day

^cOne or more joints per day

^dχ² test

^eCramer’s V