Table 1. Frequencies of psychiatric medication.

		persistent depression	recurrent depression	p
antidepressants	SSRI	5	9	.313
	SNRI	5	2	.405
	TZA	2	2	1
	MAO	3	2	1
	Other AD	5	8	.495
antipsychotics		3	5	.693
mood stabilizer		3	5	.693
others		1	4	.340
no medication (n)		0	1	1

Since the majority of patients took more than one substance, frequencies represent the number of patients taking a substance. SSRI included Escitalopram (n = 6), Sertraline (n = 4), Fluoxetine (n = 2), and Citalopram (n = 2). SNRI included Venlafaxine (n = 6) and Milnacipran (n = 1). TZA included Amitriptyline (n = 2), Nortriptyline (n = 1) and Doxepin (n = 1). MAO-inhibitors included Tranylcypromine (n = 5). Other AD included the antidepressants Mirtazapine (n = 7), Agomelatine (n = 2), Bupropion (n = 4) and Tianeptine (n = 1). Antipsychotics included Quetiapine (n = 7) and Aripiprazole (n = 1). Mood stabilizer include Lithium (n = 8). Others include Pregabaline (n = 5) and Zolpidem (n = 1). The significance value refers to Fisher’s exact test. For two patients (one in each group) data were not available.