Table 2.
Binomial regression analysis of predictors of completion of care, controlling for randomization group
| Regression coefficient | Standard error | Adjusted RR (95%CI) | P value | |
|---|---|---|---|---|
| Independent variables | ||||
| Demographics | ||||
| Age >40 years | 0.3247 | 0.1061 | 1.38 (1.12–1.70) | 0.002 |
| Male | −0.0512 | 0.1186 | 0.95 (0.75–1.20) | 0.666 |
| Race/ethnicity | 0.179 | |||
| African-American vs. African | −0.1468 | 0.1190 | 0.86 (0.68–1.09) | 0.217 |
| Latino vs. African | −0.3449 | 0.1692 | 0.71 (0.51–0.99) | 0.042 |
| Other vs. African | −0.0814 | 0.1826 | 0.92 (0.64–1.32) | 0.656 |
| Foreign-born | 0.0541 | 0.1149 | 1.06 (0.84–1.32) | 0.637 |
| Social characteristics | ||||
| Completed high school | −0.1249 | 0.1062 | 0.88 (0.72–1.09) | 0.239 |
| Employed | 0.0897 | 0.1059 | 1.09 (0.89–1.35) | 0.397 |
| Married | 0.0999 | 0.1088 | 1.11 (0.89–1.37) | 0.358 |
| Ever homeless | −0.0804 | 0.1168 | 0.92 (0.73–1.16) | 0.491 |
| Currently homeless | −0.1877 | 0.1676 | 0.83 (0.60–1.15) | 0.263 |
| Prior TB | −0.1042 | 0.2474 | 0.90 (0.55–1.46) | 0.674 |
| History of mental illness | −0.6013 | 0.3131 | 0.55 (0.30–1.01) | 0.055 |
| Depressed (CESD > 16) | 0.0478 | 0.1096 | 1.05 (0.85–1.30) | 0.663 |
| Substance abuse | ||||
| Current smoking | −0.0185 | 0.1127 | 0.98 (0.79–1.22) | 0.870 |
| Ever alcohol use | −0.1675 | 0.1075 | 0.85 (0.69–1.04) | 0.119 |
| Current alcohol use | −0.1559 | 0.1227 | 0.86 (0.67–1.09) | 0.204 |
| Ever drug use | 0.0003 | 0.1058 | 1.00 (0.81–1.23) | 0.997 |
| Current drug use | −0.1958 | 0.1675 | 0.82 (0.59–1.14) | 0.242 |
| Benefits and barriers | ||||
| Benefits scale | 0.0386 | 0.1237 | 1.04 (0.82–1.32) | 0.755 |
| Barriers scale | −0.1704 | 0.1484 | 0.84 (0.63–1.13) | 0.251 |
| Quality of life, physical (mean) | −0.0034 | 0.0060 | 1.00 (0.99–1.01) | 0.570 |
| Quality of life, mental (mean) | 0.0056 | 0.0051 | 1.01 (1.00–1.02) | 0.273 |
| Social support scale | −0.0085 | 0.0560 | 0.99 (0.89–1.11) | 0.880 |
| Knowledge of TB transmission | ||||
| TB from crowded conditions | 0.0986 | 0.1894 | 1.10 (0.76–1.60) | 0.603 |
| TB from sharing dishes, etc. | 0.1014 | 0.1161 | 1.11 (0.88–1.39) | 0.383 |
| TB through kissing | 0.2526 | 0.1061 | 1.29 (1.05–1.58) | 0.017 |
| TB from stranger vs. family | 0.0526 | 0.1058 | 1.05 (0.86–1.30) | 0.619 |
| Knowledge of testing and treatment | ||||
| TST+ indicates active disease | −0.1315 | 0.1081 | 0.88 (0.71–1.08) | 0.224 |
| ‘Sleeping TB’ is contagious | 0.1485 | 0.1103 | 1.16 (0.93–1.44) | 0.178 |
| TST+ can mean need for drugs | 0.6988 | 0.4857 | 2.01 (0.78–5.21) | 0.150 |
| Most TB can be cured with drugs | 0.2275 | 0.2826 | 1.26 (0.72–2.18) | 0.421 |
| HIV+, more likely to get TB | −0.1380 | 0.1070 | 0.87 (0.71–1.07) | 0.197 |
| LTBI treatment can take 1 month | 0.2060 | 0.1210 | 1.23 (0.97–1.56) | 0.089 |
| Undocumented person may be deported for anti-tuberculosis treatment | 0.0185 | 0.1086 | 1.02 (0.82–1.26) | 0.865 |
| Knowledge of symptoms | ||||
| Weight loss | 0.1869 | 0.1713 | 1.21 (0.86–1.69) | 0.275 |
| Swollen feet | −0.1739 | 0.1159 | 0.84 (0.67–1.05) | 0.134 |
| Cough | 0.2686 | 0.3779 | 1.31 (0.62–2.74) | 0.477 |
| Vomiting | 0.0090 | 0.1142 | 1.01 (0.81–1.26) | 0.938 |
| Coughing up blood | 0.0567 | 0.1585 | 1.06 (0.78–1.44) | 0.721 |
| Knowledge score | 0.0451 | 0.0292 | 1.05 (0.99–1.11) | 0.123 |
| Attitudes | ||||
| BCG vaccine prevents TB disease | 0.0313 | 0.0541 | 1.03 (0.93–1.15) | 0.563 |
| No matter what, you could still get TB germ | 0.114 | |||
| Somewhat agree | −0.0127 | 0.1378 | 0.99 (0.75–1.29) | 0.927 |
| Somewhat disagree | 0.0809 | 0.1380 | 1.08 (0.83–1.42) | 0.558 |
| Strongly agree | −0.2876 | 0.1589 | 0.75 (0.55–1.02) | 0.070 |
| Strongly disagree | Reference | |||
| Taking TB medicines is important | 0.2409 | 0.1852 | 1.27 (0.89–1.83) | 0.193 |
| You know better than doctor when to stop medicines | −0.0174 | 0.0552 | 0.98 (0.88–1.10) | 0.753 |
| Clinic appointments are more trouble than they’re worth | −0.0158 | 0.0726 | 0.98 (0.85–1.13) | 0.828 |
| Do not trust doctor for best care | 0.336 | |||
| Strongly agree | −0.1216 | 0.3272 | 0.89 (0.47–1.68) | 0.710 |
| Strongly disagree | 0.1601 | 0.1444 | 1.17 (0.88–1.56) | 0.268 |
| Disagree/agree | Reference | |||
| Doing right thing can avoid getting TB | 0.176 | |||
| Strongly agree | 0.2654 | 0.1450 | 1.30 (0.98–1.73) | 0.067 |
| Strongly disagree | 0.1650 | 0.2211 | 1.18 (0.76–1.82) | 0.455 |
| Disagree/agree | Reference | |||
| Worry about passing TB germ to loved ones | 0.075 | |||
| Strongly agree | 0.0665 | 0.1289 | 1.07 (0.83–1.38) | 0.606 |
| Strongly disagree | 0.3124 | 0.1330 | 1.37 (1.05–1.77) | 0.019 |
| Disagree/agree | Reference | |||
| Embarrassed to say you have TB germ | 0.685 | |||
| Strongly agree | −0.0485 | 0.1408 | 0.95 (0.72–1.26) | 0.730 |
| Strongly disagree | −0.0904 | 0.1200 | 0.91 (0.72–1.16) | 0.451 |
| Disagree/agree | Reference | |||
| Believe that you have the TB germ | 0.073 | |||
| Somewhat agree | 0.3780 | 0.1768 | 1.46 (1.03–2.06) | 0.033 |
| Somewhat disagree | 0.0098 | 0.2576 | 1.01 (0.59–1.73) | 0.972 |
| Strongly agree | 0.1559 | 0.1791 | 1.17 (0.82–1.66) | 0.384 |
| Strongly disagree | Reference | |||
| Care about what family and friends think of anti-tuberculosis treatment | 0.967 | |||
| Strongly agree | 0.0401 | 0.1243 | 1.04 (0.82–1.33) | 0.747 |
| Strongly disagree | 0.0160 | 0.1368 | 1.02 (0.78–1.33) | 0.907 |
| Disagree/agree | Reference | |||
| Try hard, will still miss some medicines | 0.824 | |||
| Somewhat agree | 0.0887 | 0.1202 | 1.09 (0.86–1.38) | 0.460 |
| Somewhat disagree | −0.0315 | 0.1564 | 0.97 (0.71–1.32) | 0.841 |
| Strongly agree | −0.0804 | 0.2421 | 0.92 (0.57–1.48) | 0.740 |
| Strongly disagree | Reference | |||
| Taking TB medicines is a hassle | 0.202 | |||
| Strongly agree | 0.4126 | 0.1645 | 1.51 (1.09–2.09) | 0.012 |
| Strongly disagree | 0.1033 | 0.1247 | 1.11 (0.87–1.42) | 0.407 |
| Disagree/agree | Reference | |||
| Only something really serious would prevent me from taking TB medicines | 0.946 | |||
| Strongly agree | 0.0483 | 0.1302 | 1.05 (0.81–1.35) | 0.711 |
| Strongly disagree | 0.0518 | 0.1341 | 1.05 (0.81–1.37) | 0.699 |
| Disagree/agree | Reference | |||
RR = risk ratio; CI = confidence interval; TB = tuberculosis; CESD = Center for Epidemiologic Studies Depression Scale; TST = tuberculin skin test; + = positive; HIV = human immunodeficiency virus; LTBI = latent tuberculous infection.