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Substance Abuse Treatment, Prevention, and Policy
Table 2 Relationship between different sequencing patterns and age of onset of substance use
Investigating the sequential patterns of methamphetamine use initiation in Iran
Age started (mean ± SD)
16.15 ± 4.34
17.04 ± 4.92
17 ± 3.77
12.05 ± 3.94
C (sequencing C): tobacco-opium-MA; D (sequencing D), tobacco-opium-heroin-MA; E (sequencing E): tobacco-alcohol-opium-heroin-MA; and F (sequencing F), tobacco-alcohol-cannabis-opium-heroin-MA.
Dissimilar values (superscripts a and b) of each row are significantly different.
*Values were analyzed by one-way analysis of variance (ANOVA); values are mean ± SD
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