Table 2

Patterns of Drug Use at 6 Months by Baseline Status

Use Pattern for the Last 30 Days, 6 Months After Baseline, n (%)	Baseline Use Pattern		P Value
	Weekend Only (n = 52)	Not Weekend Only (n = 431)	P Value
No use^a	14 (26.9)	56 (13)
Weekend-only use	10 (19.2)	22 (5.1)
Not–weekend-only use	28 (53.9)	353 (81.9)	.001^b

↵a Among participants with drug use at baseline.
↵b Overall chi-square test of association. Subsequent post-hoc tests suggest significant differences for each category 6 months later.