Table 1.

Participant data

	MA group (n = 100)	Comparison group (n = 100)
Inclusion criteria	- Constant MA use over a minimum period of 1 year - Constant MA use of 1 g/week by intranasal use, smoking, intravenous use or swallowing	- Same gender as MA user - Same age as MA user with a tolerance of ±1 year
Exclusion criteria	- Last MA use longer than 1 month ago - <18th year of birth - Excessive co-consumption of other addictive substances to a similar extent to MA	-Any use of addictive substances in life
Recruitment and location of examination	- Addiction Clinic in Hochstadt/Main, Germany (n = 76) - Department of Addiction Medicine, Hospital for Psychiatry, Psychotherapy, Psychosomatic Medicine, Bayreuth, Germany (n = 24)	- Department of Oral and Maxillofacial Surgery, Klinikum rechts der Isar, Munich, Germany (n = 66) - Dental surgery clinic, Augsburg, Germany (n = 34)
Demographic characteristics	- Mean age: 29.4 years (SD ± 7.4) - Gender distribution: 83 males, 17 females	- Mean age: 29.3 years (SD ± 7.2 years) - Gender distribution: 83 males, 17 females
Mean duration of MA use	- 6.9 years (SD ± 4.6)	- None

MA methamphetamine, SD standard deviation