Table 5.

Type of Regret

Studies	No. Regrets	Transmasculine	Transfeminine	Type of Regrets based on Pfafflin, 1993		Type of Regrets based on Kuiper and Cohen-Kettenis, 1998				Surgery	De-transition (Y/N)
				Minor	Major	1	2	3	4
Blanchard et al, 1989	4	—	4	4	—	2	2	—	—	Vaginoplasty	N
Bouman, 1988	1	—	1	—	1	1	—	—	—	Vaginoplasty	NS
De Cuypere et al, 2006	2	1	1	2	—	—	2	—	—	NS	NS
Imbimbo et al, 2009	8	—	8	NS	NS	NS	NS	NS	NS	Vaginoplasty	NS
Jiang et al, 2018	1	—	1	1	—	—	1	—	—	Vulvoplasty	NS
Kuiper et al, 1998	10	1	9	4	6	6	3	1	—	NS	1 testicles implant removal and underwent breast augmentation
Lawrence, 2003	15	—	15	13	2	2	13	—	—	Vaginoplasty	NS
Olson-Kennedy et al, 2018	1	1	—	NS	NS	NS	NS	NS	NS	Mastectomy	NS
Pfafflin, 1993	3	3	—	—	3	3	—	—	—	NS (complication urethral-vaginal fistula)	NS
Van de Grift et al, 2018	2	1	1	2	—	—	2	—	—	Transfemenine = Vaginoplasty Transmasculine = mastectomy and uterus extirpation (hematoma)	NS
Wiepjes et al, 2018	14	3	11	0	14	13	1	0	0	Gonadectomy	Y (10)*
Zavlin et al, 2018	1	—	1	NS	NS	NS	NS	NS	NS	Vaginoplasty	NS
Judge et al, 2014	3	—	3	NS	NS	NS	NS	NS	NS	NS	NS
Weyers et al, 2009	2	—	2	NS	NS	NS	NS	NS	NS	Vaginoplasty	NS
Poudrier et al, 2019	2	2	—	2	—	—	2	—	—	Mastectomy	NS
Laden et al, 1998	8	NS	NS	—	8	8	—	—	—	NS	Y

*8 mastectomies, 2 vaginectomies, 2 phalloplasties, 2 testicular implants removal, and 1 breast augmentation.

N, no; NS, not specified; Y, Yes.