From: Investigating the sequential patterns of methamphetamine use initiation in Iran
Sequence | C (n = 19)a | D (n = 24)a | E (N = 17)a | F (N = 20)b | *P-value |
---|---|---|---|---|---|
Age started (mean ± SD) | 16.15 ± 4.34 | 17.04 ± 4.92 | 17 ± 3.77 | 12.05 ± 3.94 | <  0.0001 |