Table 3.
Predictors of subject visit participation in HOST study by bivariate and multivariate GEE analysis.
| Predictor | Crude OR (95% CI) |
Pa | Adjusted OR (95% CI) |
Pb |
|---|---|---|---|---|
| Site | ||||
| Chesapeake | 0.72 (0.48, 1.09) | 0.12 | 0.69 (0.45, 1.04) | 0.08 |
| Detroit | 0.45 (0.30, 0.67) | <0.001 | 0.47 (0.31, 0.71) | <0.001 |
| Los Angeles | 0.73 (0.52, 1.03) | 0.08 | 0.67 (0.48, 0.94) | 0.02 |
| Oklahoma City | 0.88 (0.56, 1.40) | 0.59 | 0.75 (0.47, 1.19) | 0.22 |
| San Francisco | Reference | Reference | ||
| Phase | ||||
| Visit 3 vs. Visit 2 | 0.63 (0.54, 0.73) | <0.001 | 1.34 (1.00, 1.79) | 0.05 |
| Visit 5 vs. Visit 3 | 0.29 (0.24, 0.35) | <0.001 | 0.29 (0.22, 0.39) | <0.001 |
| Visit 6 vs. Visit 5 | 0.28 (0.23,0.33) | <0.001 | 1.38 (0.90, 2.11) | 0.14 |
| Reimbursement for interview | ||||
| $25 vs. $10 | 1.14 (0.95, 1.47) | 0.13 | 1.84 (1.22, 2.77) | 0.004 |
| Gender | ||||
| Female | 1.25 (0.99, 1.57) | 0.05 | 1.31 (1.04, 1.66) | 0.02 |
| Male | Reference | Reference | ||
| Age | ||||
| One year increase | 1.00 (0.99, 1.02) | 0.69 | 1.00 (0.99, 1.01) | 0.41 |
| Race/Ethnicity | ||||
| Black | 0.51 (0.40, 0.67) | <0.001 | 0.61 (0.47, 0.80) | 0.004 |
| Asian | 0.74 (0.44, 1.24) | 0.25 | 0.68 (0.42, 1.10) | 0.11 |
| Hispanic | 0.71 (0.52, 0.96) | 0.03 | 0.76 (0.56, 1.04) | 0.09 |
| Other | 0.59 (0.35,0.99) | 0.05 | 0.59 (0.36, 0.99) | 0.05 |
| White | Reference | Reference | ||
| Education | ||||
| High school or less | Reference | Reference | ||
| Some college | 1.35 (1.05, 1.73) | 0.02 | 1.14 (0.89, 1.47) | 0.29 |
| Bachelor's degree | 2.01 (1.43, 2.28) | <0.001 | 1.56 (1.09, 2.23) | 0.02 |
| Master's or professional degree | 2.31 (1.45, 3.67) | <0.001 | 1.86 (1.19, 2.92) | 0.01 |
| Annual income | ||||
| <$10,000 | Reference | Reference | ||
| $10,000–29,999 | 1.56 (1.04, 2.34) | 0.03 | 1.47 (0.97, 2.28) | 0.07 |
| $30,000–49,999 | 1.74 (1.17, 2.59) | 0.01 | 1.57 (1.04, 2.40) | 0.03 |
| $50,000–74,999 | 2.52 (1.64, 3.88) | <0.001 | 1.96 (1.24, 3.10) | 0.004 |
| ≥ $75,000 | 3.73 (2.25, 6.19) | <0.001 | 2.68 (1.58, 4.56) | 0.003 |
| Health status in previous Visit | ||||
| Excellent | 1.72 (1.18,2.50) | 0.01 | 1.20 (0.80, 1.81) | 0.38 |
| Very good | 1.75 (1.22,2.52) | 0.003 | 1.33 (0.91, 1.96) | 0.14 |
| Good | 1.18 (081,1.72) | 0.38 | 1.12 (0.85, 1.47) | 0.14 |
| Fair or Poor | Reference | Reference | ||
| Ever used IV drugs | ||||
| Yes | 1.57(1.08,2.26) | 0.02 | 1.08 (0.83,1.42) | 0.55 |
| No | Reference | Reference | ||
| HTLV status | ||||
| HTLV-I | 0.64 (0.46, 0.89) | 0.01 | 1.12 (0.85,1.47) | 0.42 |
| HTLV-II | 0.70 (0.55, 0.88) | 0.003 | 1.01 (0.70, 1.45) | 0.96 |
| HTLV-Negative | Reference | Reference | ||
| Referral for further exam in previous visit | ||||
| Yes | 0.86 (0.68, 1.09) | 0.22 | 1.08 (0.83,1.42) | 0.55 |
| No | Reference | Reference |
Note: OR = odds ratio; CI= confidence interval.
abivariate analysis
bmultivariate analysis, controlling for all other values shown in the table