Table 1.

General characteristics of the studied patients

	Case group (n = 39)	Control group (n = 42)	P
Age	36.7 ± 4.58	36.6 ± 7.53	Not significant
Male/female ratio	All were male	All but one were male	Not significant
Mean opium use (gram/day, as stated by the patients)	1.8 ± 0.43	1.7 ± 0.51	Not significant
Mean duration of opium abuse (years, as stated by the patients)	10.1 ± 5.21	10.2 ± 6.08	Not significant