Table 2.

Baseline demographic characteristics (descriptive statistics)

Characteristic	Mean	SD	Range
Age in years	37.4	9.9	24 – 52
Estimated lifetime use of methamphetamine in grams	5,662.9	9,671.0	10.5 – 37,280.0
Abstinence from methamphetamine in days	52.9	94.6	0 – 363
Total years of methamphetamine use	18.9	9.4	4 – 35
Hamilton Depression Rating Scale score	16.9	3.5	11 – 21
Beck Anxiety Inventory score	18.0	11.2	4 – 39