Table 1.

Studies included in the revision with relevant information about the possible role of childhood traumas in the relationship between childhood Attention-Deficit/Hyperactivity Disorder (ADHD) and adult Borderline Personality Disorder (BPD)

Study	Size and election sample	Type of study	Targeted sample	Healthy control group	Assessment instrument	Main findings
Philipsen et al. 2008 [14]	BPD outpatients N = 118 women	Cross-sectional	Clinical study	No	WURS ADHD-CL SCID-I IPDE BSL CTQ	A significant association is described between childhood ADHD, childhood emotional abuse, and severity symptoms in women with BPD. Childhood ADHD may be considered a risk factor that predisposes to BPD development in the adulthood.
Prada et al. 2014 [24]	Outpatients N = 114 ADHD N = 99 BPD N = 67 BPD-ADHD	Cross-sectional	Clinical study	N = 415	SCID-II WURS ASRS v.11 CTQ BIS-10 STAXI LHA BDI-II BHS WHOQOL-BREF QFS	Compared with adult ADHD, adult BPD patients showed a higher number of childhood trauma.
Ferrer et al. 2017 [23]	Outpatients N = 82 BPD N = 22 ADHD N = 56 BPD-ADHD N = 44 No BPD-No ADHD	Cross-sectional	Clinical study	No	SCID-II DIB-R CTQ-SF CADDID WURS	Adult BPD patients with a comorbid ADHD presented the highest number of childhood trauma experiences. Childhood emotional and sexual abuse was associated to BPD diagnosis in the adulthood, with and without comorbid ADHD. The risk of developing an adult BPD in childhood ADHD could be associated to specific early traumas.
Dalbudak and Evren, 2015 [25]	Volunteer university students N = 271	Cross-sectional	Non-clinical study	No	BPI ASRS CTQ-28 BDI BAI	Depressive symptoms, emotional and physical abuse and severity of ADHD symptoms in adulthood were associated to severity of borderline personality features (BPF). These variables may play a mediator role on the relationship between childhood ADHD and adult BPF.