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. 2025 Jun 27;11:e67005. doi: 10.2196/67005

Table 2. Characteristics of the 2 study samples.

Characteristics Sample 2020 (n=1692) Sample 2021 (n=4893) P value
Age (years), median (IQR) 36 (30-44) 38 (31-45) <.001
Age group (years), n (%) .003
 18‐24 90 (5.3) 241 (4.9)
 25‐29 283 (16.7) 651 (13.3)
 30‐39 667 (39.4) 1900 (38.8)
 40‐49 392 (23.2) 1317 (26.9)
 50‐59 223 (13.2) 679 (13.9)
 60+ 37 (2.2) 105 (2.1)
Gender, n (%) .68
 Cisgender man 1665 (98.4) 4800 (98.1)
 Trans man 2 (0.1) 5 (0.1)
 Trans woman 2 (0.1) 9 (0.2)
 Travesti 23 (1.4) 74 (1.5)
 Nonbinary 0 (0) 5 (0.1)
Sexual orientation, n (%) .003
 Gay 1555 (91.9) 4344 (88.8)
 Bisexual 118 (7.0) 451 (9.2)
 Heterosexual 7 (0.4) 41 (0.8)
 Othera 12 (0.7) 57 (1.2)
Race, n (%) .003
 Asian 20 (1.2) 43 (0.9)
 Black 173 (10.2) 577 (11.8)
 Pardo/mixed 419 (24.8) 1426 (29.1)
 Indigenous 18 (1.1) 52 (1.1)
 White 1024 (60.5) 2767 (56.6)
 Missing 38 (2.2) 28 (0.6)
Schooling, n (%) .08
 High school or less 514 (30.4) 1646 (33.6)
 Undergraduate degree 650 (38.4) 1819 (37.2)
 Graduate degree 508 (30.0) 1416 (28.9)
 Missing 20 (1.2) 12 (0.2)
Household incomeb, n (%) .13
 Low 457 (27) 1428 (29.2)
 Middle 776 (45.9) 2116 (43.2)
 High 459 (27.1) 1297 (26.5)
 Missing 0 (0) 52 (1.1)
Region of residency, n (%) <.001
 North 10 (0.6) 120 (2.5)
 Northeast 38 (2.2) 431 (8.8)
 Central-west 55 (3.3) 330 (6.7)
 Southeast 1386 (81.9) 3317 (67.8)
 South 203 (12.0) 695 (14.2)
Adherence to ARTc-based on WebAd-Qd , n (%) >.99
 No 721 (42.6) 2087 (42.7)
 Yes 971 (57.4) 2806 (57.3)
Adherence to ART based on VASe, median (IQR) 100 (98-100) 100 (98-100) .24
Adherence to ART based on VAS dummyf, n (%) .17
 No 514 (30.4) 1398 (28.6)
 Yes 1178 (69.6) 3495 (71.4)
PEDIAg scale
 Total score, median (IQR) 36 (32-40) 36 (32-40) .03
 Fear and feelings, median (IQR) 17 (14-19) 17 (14-19) .11
 Cognitive and routines problems, median (IQR) 6 (4-8) 6 (4-8) .50
 Medication and health concerns, median (IQR) 11 (10-12) 11 (10-12) .01
a

“Other” includes responses of asexual, pansexual, and other.

b

Household income was based on the ratio of household income relative to the number of minimum wages monthly: low ≤2, middle >2 and ≤ 6, and high >6.

c

ART: antiretroviral therapy.

d

Answered “no” to all 3 questions.

e

VAS: visual analog scale.

f

Dummy equals 1 if answered “100” on VAS, and 0 otherwise.

g

PEDIA: perceived barriers to antiretroviral therapy adherence.