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Table 3 Associations between post-traumatic stress symptom score (PC-PTSD-5 ≥ 3 versus PC-PTSD-5 < 3) and sexual behaviour, PrEP attitudes and mental health co-morbidities

From: Symptoms of post-traumatic stress and associations with sexual behaviour and PrEP preferences among young people in South Africa, Uganda and Zimbabwe

Outcome variable and categoriesa

Crude results

Adjusted for study setting, sex and age group

Further adjusted for depression and anxiety

ORb (95% CI)

p-value

ORb (95% CI)

p-value

ORb (95% CI)

p-value

Sexual behaviour characteristics

      

 Number partners, last 6 months (0, 1, 2, 3+)

1.15 (1.08, 1.23)

< 0.001

1.08 (1.01, 1.16)

0.02

1.08 (1.01, 1.16)

0.03

 Sex frequency, past month (never, weekly-monthly, >weekly)

1.14 (1.06, 1.22)

< 0.001

1.04 (0.96, 1.12)

0.32

1.03 (0.96, 1.11)

0.41

 Last time had sex, how far in advance knew (> 24 h, 12–23 h, 2–12 h, < 2 h)

1.04 (0.97, 1.12)

0.27

1.02 (0.95, 1.10)

0.55

1.02 (0.95, 1.10)

0.55

 Condom use last sex with recent partner (no, yes)

0.94 (0.87, 1.02)

0.14

0.93 (0.85, 1.01)

0.09

0.95 (0.87, 1.03)

0.23

 Type of relationship, most recent partner (regular, casual/paying/other)

1.11 (1.00, 1.22)

0.04

1.15 (1.03, 1.28)

0.01

1.14 (1.02, 1.27)

0.02

 HIV status, most recent partner (negative, positive/don’t know)

1.07 (0.98, 1.15)

0.12

1.09 (1.00, 1.18)

0.05

1.09 (1.00, 1.19)

0.05

General risk taking and HIV salience characteristics

     

 Self-perception of frequency of risk-taking (never, sometimes, often)

1.16 (1.09, 1.25)

< 0.001

1.13 (1.05, 1.21)

0.001

1.12 (1.04, 1.20)

0.004

 Thought about risk of HIV, last 3 months (never, rarely, sometimes, often)

1.23 (1.15, 1.31)

< 0.001

1.18 (1.10, 1.27)

< 0.001

1.16 (1.08, 1.25)

< 0.001

 Chance of HIV, next 3 months (none, some, moderate/high)

1.16 (1.08, 1.24)

< 0.001

1.10 (1.03, 1.19)

0.01

1.09 (1.01, 1.17)

0.02

Attitudes towards PrEP

      

 PrEP preference (on demand, daily)

1.09 (1.01, 1.18)

0.02

1.04 (0.96, 1.13)

0.32

1.04 (0.96, 1.13)

0.36

 Would take PrEP if same price as hot meal (no, yes)

1.08 (0.99, 1.17)

0.07

1.06 (0.97, 1.15)

0.18

1.07 (0.99, 1.17)

0.10

 Would disclose PrEP to partner (no, yes)

1.03 (0.95, 1.12)

0.42

1.01 (0.93, 1.09)

0.85

1.02 (0.94, 1.11)

0.58

Alcohol and drug use

      

 Frequency of binge drinking (don’t drink; never, <monthly, ≥monthly)

1.21 (1.14, 1.30)

< 0.001

1.14 (1.06, 1.23)

< 0.001

1.14 (1.06, 1.23)

0.001

 Drug use, last 30 days (no, yes)

1.14 (1.03, 1.26)

0.01

1.08 (0.96, 1.22)

0.19

1.06 (0.94, 1.19)

0.34

  1. aFor binary outcome variables, the reference group is listed first; for ordered categorical outcome variables, the categories are listed in order;
  2. bOdds ratio represent the increase in odds for a one unit increase in PC-PTSD-5 score
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BMC Infectious Diseases

ISSN: 1471-2334

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