Table 1. Patient characteristics.

Pain duration (in years)	n
> 5:	15
2–5:	6
1–2:	6
0.5–1:	2
No. of different pain domains (e.g. abdominal pain, back pain)	n
1:	4
2:	9
> 2:	16
Type of pain	n
Constant with little fluctuations	3
Constant with strong fluctuations	17
Attacks with pain-free periods	2
Attacks with constant pain in-between	5
Pain intensity	mean ± SD
Mean rating on 101-pt visual analog scale	65.9 ± 14.3
Physicians consulted for pain in the past	mean ± SD
Mean number	5.2 ± 2.2
Pain treatments/therapies in the past	mean ± SD
Mean number	7.8 ± 4.2
Current psychotropic/analgesic medication	n
Selective serotonin re-uptake inhibitors / Serotonin–norepinephrine reuptake inhibitors	20
Non-steroidal anti-inflammatory	14
Opioid	10
Pregabalin/Gabapentin	6
Atypical antipsychotics	6
Tricyclic antidepressants	4
Agomelatine	2
Benzodiazepines	2
Lithium	1
Methylphenidate	1

Clinical parameters according to the German Pain Questionnaire. The number of subjects (N = 30) varies due to unanswered items.