Table 3. Bivariate predictors of willingness to participate in future vaccine trials among Control and Retaining group at Baseline.
| Demographics | Control group OR (95% CI) | Retaining group OR (95% CI) | p-value† |
|---|---|---|---|
| Gender | |||
| Female Transgender |
1.0 4.1 (1.6–10.4)** |
1.0 1.0 (0.4–2.2) |
0.02 |
| Age | |||
| 18–31 > 31–45 > 45 |
1.0 1.1 (0.4–2.9) 2.5 (0.5–11.7) |
1.0 0.7 (0.3–1.5) 3.3 (0.8–14.1) |
0.53 0.81 |
| Origin | |||
| Spain Other European Country Latin America Africa Asia |
1.0 0.4 (0.03–6.1) 1.1 (0.2–6.0) 0.1 (0.01–1.0) – |
1.0 0.6 (0.1–2.9) 1.4 (0.4–4.6) 0.8 (0.2–2.9) 1.8 (0.1–35.4) |
0.78 0.81 0.12 – |
| Education | |||
| No studies Primary Secondary University |
– 0.3 (0.1–1.3) 0.5 (0.1–1.8) 1.0 |
0.2 (0.03–1.8) 1.0 (0.2–1.7) 0.8 (0.2–3.9) 1.0 |
– 0.27 0.61 |
| Sexual Behavior (ever) | |||
| Heterosexual Homosexual Bisexual |
1.0 4.8 (1.8–12.6)** – |
1.0 0.7 (0.3–1.9) 1.3 (0.3–5.2) |
< 0.01 – |
|
Risk Behaviors | |||
| Injection drug use (ever) |
– |
– |
– |
| Non-injection drug use (ever) |
1.3 (0.7–4.0) |
1.2 (0.6–2.6) |
0.61 |
| Performs sex work in last 6months |
– |
– |
– |
| Performs sex work in last month |
– |
– |
– |
| Sex with a known HIV positive partner in last 6 mo | |||
| No Yes Unknown |
1.0 – 3.6 (0.5–29.5) |
1.0 0.9 (0.1–16.4) 0.4 (0.2–1.0) |
– 0.07 |
| Sex with a known HIV positive partner in last month | |||
| No Yes Unknown |
1.0– 4.6 (0.6–36.3) |
1.0 – 0.5 (0.2–1.1) |
– 0.05 |
| Sex with an IDU partner in last 6 mo | |||
| No Yes Unknown |
1.0 2.5 (0.2–32.2) 1.4 (0.5–3.9) |
1.0 1.4 (0.3–5.6) 1.0 (0.5–2.1) |
0.69 1.43 |
| Sex with an IDU partner in last month | |||
| No Yes Unknown |
1.0 – 1.5 (0.5–4.1) |
1.0 5.5 (0.5–55.0) 1.0 (0.5–2.2) |
– 0.56 |
| Sex with a partner using other drugs last 6 mo | |||
| No Yes Unknown |
1.0 4.6 (0.6–37.9) 1.2 (0.1–11.8) |
1.0 0.4 (0.1–1.2) 0.2 (0.1–0.8)* |
0.05 0.22 |
| Sex with a partner using other drugs in last month | |||
| No Yes Unknown |
1.0 1.1 (0.4–2.9) 0.3 (0.1–1.1) |
1.0 1.2 (0.5–2.7) 0.5 (0.2–1.3) |
0.85 0.55 |
| Sex with a partner having multiple sexual partners in last 6 mo | |||
| No Yes Unknown |
1.0 1.6 (0.2–14.3) 1.0 (0.1–20.0) |
1.0 0.9 (0.2–5.9) 0.3 (0.03–3.5) |
0.70 0.57 |
| Sex with a partner having multiple sexual partners in last month | |||
| No Yes Unknown |
1.0 0.6 (0.2–1.4) 0.4 (0.04–4.1) |
1.0 2.0 (0.9–4.2) 0.5 (0.1–2.6) |
0.04 0.92 |
| UA/V sex with steady or casual partner in last 6 mo |
0.7 (0.3–1.7) |
0.9 (0.4–1.8) |
0.76 |
| UA/V sex with clients in last 6 mo |
– |
1.8 (0.3–9.1) |
– |
| Self reported STI symptoms in last 6 mo | 2.7 (0.4–17.5) | 0.9 (0.2–4.9) | 0.38 |
*p < 0.05; **p < 0.01; †p-value for difference in willingness by study arm.