From: Implications of the HIV testing protocol for refusal bias in seroprevalence surveys
 | Binary logistic regression predicting refusal (exp(b) or odds ratios) | Multinomial logistic regression predicting refusal (exp(b) or relative risk ratios) | ||||
---|---|---|---|---|---|---|
 | B & C versus A | B versus A | C versus A | B versus A | C versus A | |
 | Model 1 | Model 2 | Model 3 | Model 4 | ||
Likelihood of infection | 1.01** | 1.01** | 1.02** | 1.01** | 1.01** | 1.01** |
Counselor (vs #1) | Â | Â | Â | Â | Â | Â |
Counselor 2 | 0.07** | 0.07** | 0.12** | 0.05** | 0.06** | 0.09** |
Counselor 3 | 0.46 | - | 0.09** | 0.71 | - | - |
Counselor 5 | 0.50 | 0.33 | 1.58 | - | 1.48 | - |
Counselor 6 | - | - | - | - | - | - |
Counselor 7 | 0.01** | 0.01** | 0.01** | 0.02** | 0.00** | 0.01** |
Counselor 8 | 0.46** | 0.44 | 0.56 | 0.42** | 0.26 | 0.68 |
Counselor 9 | 0.65 | 0.56 | 0.43 | 0.78 | 0.38 | 0.76 |
Study month (vs period prior to ART) | 0.82** | 0.81** | 0.78** | 0.84** | 0.73** | 0.88* |
Ward (vs ER) | Â | Â | Â | Â | Â | Â |
GY | Â | 1.23 | Â | Â | 0.44 | 2.68** |
IM | Â | 1.42 | Â | Â | 0.56 | 2.73** |
SU | Â | 0.83 | Â | Â | 0.60 | 1.04 |
Male | Â | 1.96** | Â | Â | 1.68** | 2.30** |
Age | Â | 1.05 | Â | Â | 1.13** | 1.02 |
Age squared | Â | .999* | Â | Â | .998** | 1.00 |
Education (vs no schooling) | Â | Â | Â | Â | Â | Â |
Grade 1–6 |  | 1.33 |  |  | 1.16 | 1.57 |
Grade 7–12 |  | 1.27 |  |  | 0.79 | 1.95** |
> 12th grade | Â | 1.70* | Â | Â | 0.82 | 2.85** |
Marital status (vs never married) | Â | Â | Â | Â | Â | Â |
Married | Â | 1.44* | Â | Â | 1.15 | 1.71** |
Sep/Div/Wid | Â | 1.92* | Â | Â | 1.78 | 2.03 |
N | 1544 | 1357" | 1546 | 1359 | ||
LR chi2 (df) | 354.57(8) | 364.68(18) | 406.49(18) | 453.04(38) | ||
Prob > chi2 | 0.00 | 0.00 | 0.00 | 0.00 | ||
Pseudo R2 | 0.21 | 0.25 | 0.18 | 0.24 | ||
Log likelihood | -680.93 | -554.13 | -917.05 | -732.04 |