Table 4.

Comparing the Youth PrEP Stigma Scale to existing validated PrEP stigma scales

	Youth PrEP Stigma Scale	PrEP Stigma Scale[31]	Community PrEP Related Stigma Scale[33]	HIV PrEP Stigma Scale[32]	PrEP Anticipated Stigma Scale[34]
Authors	Budhwani, et. al.	Klein and Washington	Algarin et. al.	Siegler et. al.	Calabrese et al
Study Year	2019-2021	2017-2018	2020-2021	2018	2017
Reliability Coefficients	Disapproval=0.90 Enacted=0.88 Stereotypes=0.83 Entire Scale=0.92	0.96	0.86	Semantic Differential=0.88 Likert=0.82	Stereotypes=0.87 Disapproval=0.91
# of Items	19	22	16	12	8
# of Factors	3	3	4	1	2
Type of Scale	4-point Likert	Yes and no and 5-point Likert	True and False, Likert, and sliding scale of proportions	Semantic differential and Likert	4-point Likert
Location	Multiple sites across the United States	National sample	Florida	Multiple sites across the United States	Connecticut Planned Parenthood Centers
Primary Populations	Young MSM and TGWM	MSM	Adult male sex at birth with sexual attraction to men	Adult male sex at birth having anal sex with a man in past year	HIV-negative, heterosexually-active, cisgender-women
PrEP usage	95.7 % current use, 4.3 % prior use	Not reported (82.1% reported being HIV-negative)	Sample only had to report awareness of PrEP	9.0% current use, 2.9% prior use (6.8% living with HIV; 17.9% PrEP eligible)	PrEP-inexperienced
Sample Size	N=235	N=273	N=107	N=279	N=597
% African American and Latinx	23.0% African American; 28.1% Latinx	27.1% African American; 18.3% Latinx	6.6% African American; 34.9% Latinx	2.3% African American; 7.7% Latinx	39.4% African American; 24.1% Latinx
Age (Years)	16-24 years; mean=21.6	18-72 years; mean=34.4	18+ years; mean=30.4	Unknown; 12.9% < 25	18+ years; 43% 18-25 years