Table 3.
Comparison of participants’ baseline characteristics by study engagement level.
| Characteristics | Partial engagement (<3 visits; n=58), n (%) | Full engagement (≥3 visits; n=146), n (%) | Bivariable logistic regression analysis | |||||||||
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ORa (95% CI) | P value | ||||||||
| Sociodemographic variables | .76 | |||||||||||
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Age (years)b,c | 30 (25-37) | 31 (27-39) | 1.01 (0.97-1.04) |
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Local Chinesec | .87 | ||||||||||
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No | 4 (6.9) | 11 (7.5) | Reference |
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Yes | 54 (93.1) | 135 (92.5) | 0.91 (0.28-2.98) |
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Education leveld | .98 | ||||||||||
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Secondary or below | 4 (7.4) | 11 (7.5) | Reference |
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Postsecondary | 50 (92.6) | 135 (92.5) | 0.98 (0.30-3.23) |
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Employedd | .27 | ||||||||||
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No | 13 (24.1) | 25 (17.1) | Reference |
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Yes | 41 (75.9) | 121 (82.9) | 1.53 (0.72-3.27) |
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Monthly income level (HKD)d,e | |||||||||||
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0 | 5 (9.3) | 12 (8.2) | Reference | —f | ||||||
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1-15,000 | 16 (29.6) | 24 (16.4) | 0.63 (0.18-2.12) | .45 | ||||||
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15,001-30,000 | 14 (25.9) | 58 (39.7) | 1.73 (0.52-5.70) | .37 | ||||||
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30,001-50,000 | 10 (18.5) | 32 (21.9) | 1.33 (0.38-4.71) | .66 | ||||||
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>50,000 | 9 (16.7) | 20 (13.7) | 0.93 (0.25-3.42) | .91 | ||||||
| Channels ever used for seeking sex partnersd | ||||||||||||
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Local physical venue | 35 (64.8) | 107 (73.3) | 1.49 (0.76-2.91) | .24 | |||||||
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Overseas physical venue | 19 (35.2) | 60 (41.1) | 1.29 (0.67-2.46) | .45 | |||||||
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Virtual venue | 51 (94.4) | 135 (92.5) | 0.72 (0.19-2.69) | .63 | |||||||
| History of sexual behavior | ||||||||||||
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History of group sexd | .06 | ||||||||||
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Never | 11 (20.4) | 15 (10.3) | Reference |
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Ever | 43 (79.6) | 131 (89.7) | 2.23 (0.95-5.23) |
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History of chemsex engagementd | .42 | ||||||||||
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Never | 31 (57.4) | 93 (63.7) | Reference |
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Ever | 23 (42.6) | 53 (36.3) | 0.77 (0.41-1.45) |
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History of STIg diagnosish | .45 | ||||||||||
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Never | 34 (68.0) | 85 (62.0) | Reference |
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Ever | 16 (32.0) | 52 (38.0) | 1.30 (0.65-2.58) |
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| HIV and STI testing | ||||||||||||
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Acceptance of regular HIV testingi | — | ||||||||||
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No | 2 (3.8) | 0 (0) | — |
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Yes | 51 (96.2) | 141 (100) | — |
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Acceptance of regular STI testingi | .36 | ||||||||||
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No | 3 (5.7) | 4 (2.8) | Reference |
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Yes | 50 (94.3) | 137 (97.2) | 2.06 (0.44-9.51) |
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Types of sampling and testing preferredd | |||||||||||
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Self-test | 28 (51.9) | 75 (51.4) | 0.98 (0.53-1.83) | .95 | ||||||
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Point-of-care test with samples collected by a trained staff member | 49 (90.7) | 116 (79.5) | 0.39 (0.14-1.08) | .07 | ||||||
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Self-sampling and testing by a lab | 10 (18.5) | 32 (21.9) | 1.24 (0.56-2.72) | .60 | ||||||
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Sample taken by an HCWj and tested by a lab | 11 (20.4) | 53 (36.3) | 2.23 (1.06-4.68) | .03 | ||||||
| Research outcomes and participation | ||||||||||||
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Baseline positive STI resultc | .37 | ||||||||||
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No | 38 (65.5) | 105 (71.9) | Reference |
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Yes | 20 (34.5) | 41 (28.1) | 0.74 (0.39-1.42) |
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Incident STI during the follow-upk | .003 | ||||||||||
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No | 24 (80.0) | 71 (48.6) | Reference |
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Yes | 6 (20.0) | 75 (51.4) | 4.23 (1.63-10.94) |
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Sought medical referral during the studyc | <.001 | ||||||||||
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No | 54 (93.1) | 83 (56.8) | Reference |
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Yes | 4 (6.9) | 63 (43.2) | 10.25 (3.52-29.79) |
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Synchronized schedule with PrEPl study visitc | <.001 | ||||||||||
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No | 40 (69.0) | 6 (4.1) | Reference |
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Yes | 18 (31.0) | 140 (95.9) | 51.85 (19.30-139.34) |
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aOR: odds ratio.
bMedian (IQR).
cn=204.
dn=200.
eUS $1=HK $7.8.
fNot applicable.
gSTI: sexually transmitted infection.
hn=187.
in=194.
jHCW: health care workers.
kn=176.
lPrEP: pre-exposure prophylaxis.