SUPPORTING INFORMATION
Supplementary Table 1. Baseline survey measurement and LCA coding of AGYW’s relationship characteristics.
Relationship
Characteristic Baseline Survey Question & Response Options Coding for Latent Class Analysis
Perceived HIV risk
From zero to 100, what do you think the chance is that you will get HIV in the next six months? Zero means that you think that you have no risk. 100 means that you are 100% sure you will get HIV in the next 6 months.
[ ] chance
Low or medium (0-66) High (67-100)
Two or more sexual partners in last six months
How many sexual partners did you have in the past 6 months?
[ ] partners Yes
No
Relationship
duration How long have you been in a relationship with your partner?
[ ] months
<3 months
≥3 months
Partner age What is [partner’s] age?
[ ] years
≥5 years older vs. <5 years older than AGYW
Cohabit with partner
With who do you live?
(1) Living together with family (2) Living with partner
(3) Living together with partner’s family (4) Living alone
Living with partner or partner’s family (2 or 3) vs. living alone or with family (1 or 4)
Always used condom with partner in past 30 days
In the past 30 days, how often have you used a condom during sexual intercourse with [partner]?
(1) Always (2) Often (3) Never
Yes No
Partner suspected to have one or more other partners
How many female sexual partners other than you do you think your partner currently has?
[ ] partners
Yes No
Low sexual relationship power
23-item Sexual Relationship Power Scale, with total possible score ranging from 23 (low power) to 76 (high power). The scores in the sample ranged from sample range: 36 to 75, with a median score of 55. Scores for each item were summed, and an individual was classified as having “low” relationship power if her total score was in or below the 25th percentile for the sample (score of 52 or lower).
Yes No
Know partner HIV status
Do you know [partner’s] HIV status?
(1) HIV negative (2) HIV positive (3) Don’t know
Yes No
Receive
financial support from partner
Do you receive financial support from your partner?
(1) Yes
(2) No
Yes No
Talk about HIV with partner more than others
Do you sometimes talk about HIV with someone?
(1) Yes
(2) No
If yes, with whom do you mostly talk about HIV?
(1) Male partner (2) Friends (3) Family (4) Others (5) Nobody
Yes No
Supplementary Table 2. Fit statistics from latent class enumeration with 2-6 classes: Akaike Information Criterion (AIC), Bayesian Information Criterion (BIC), Vuong-Lo-Mendell-Rubin (LMR) p-value, bootstrapped likelihood ratio test (BLRT) p-value, smallest class size, and entropy.
Classes AIC BIC LMR p BLRT p Smallest
Class Size Entropy
2 25491.47 25622.48 <0.001 <0.001 49% 0.65
3 25348.75 25548.12 0.04 <0.001 10% 0.67
4 25311.25 25578.98 0.07 <0.001 5% 0.67
5 25280.59 25616.66 0.22 <0.001 5% 0.56
6 25279.48 25683.91 0.27 1 2% 0.61