Characteristics

Gabapentin group
(n=30)

Placebo group
(n=30)

P-value

Age (year)

26.5 ± 5.1

27.6 ± 7.5

0.522

measure of used crack (gr/day)

0.87 ± 0.39

0.78 ± 0.24

0.327

duration of crack using (year)

2.8 ± 1.1

3.0 ± 0.9

0.522

Table 1: Baseline characteristics in gabapentin and placebo group.
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