Table 2.

NMPO use in high school (HS) and emerging adulthood (EA; ages 19 and 20).

	No use	No use in HS/ use in EA	Use in HS/ no use in EA	Use in HS and use in EA
NMPO
% of total	65.6	6.1	14.3	13.9
% of users		17.8	41.7	40.5
% of HS users			50.7	49.3
% of EA users		30.5		69.5
Marijuana
% of total	38.1	11.3	10.5	40.1
% of users		18.2	17.0	64.8
% of HS users			20.7	79.3
% of EA users		22.0		78.0
Other drugs
% of total	66.8	7.6	7.4	18.2
% of users		22.8	22.4	54.8
% of HS users			29.0	71.0
% of EA users		29.4		70.6

Note: Based on data from 754 participants with nonmissing data at all five time points.