Table 2.
Multilevel negative binomial model results for the effect of contact tracing on fatality from COVID-19 in Colombia, March 2020–January 2021.
| Variables | IRR | SE | P-value | 95% CI | |
|---|---|---|---|---|---|
| Chains with five or more contactsa | 0.52 | 0.014 | 0.000 | 0.49 | 0.55 |
| Index (suspected case) | 0.66 | 0.011 | 0.000 | 0.64 | 0.68 |
| Male sex | 1.20 | 0.009 | 0.000 | 1.17 | 1.21 |
| Age in years | |||||
| Less than 30 | 1.00 | ||||
| 30 to 49 | 1.29 | 0.015 | 0.000 | 1.25 | 1.41 |
| 50 to 69 | 3.17 | 0.037 | 0.000 | 3.10 | 3.24 |
| 70 to 79 | 6.63 | 0.101 | 0.000 | 6.43 | 6.83 |
| 80 or more | 8.04 | 0.125 | 0.000 | 7.80 | 8.29 |
| Comorbidities | |||||
| Diabetes | 1.34 | 0.024 | 0.000 | 1.31 | 1.41 |
| Cardiovascular disease | 1.23 | 0.017 | 0.000 | 1.19 | 1.25 |
| Chronic respiratory disease | 1.13 | 0.027 | 0.000 | 1.09 | 1.20 |
| Cancer | 1.36 | 0.041 | 0.000 | 1.26 | 1.42 |
| Immunodeficiency | 1.35 | 0.076 | 0.000 | 1.22 | 1.53 |
| Health system regime | |||||
| Contributory | 1.00 | ||||
| Subsidiary | 2.33 | 0.035 | 0.000 | 2.29 | 2.43 |
| Special | 1.91 | 0.060 | 0.000 | 1.79 | 2.03 |
| Non-registered | 1.91 | 0.027 | 0.000 | 1.87 | 1.99 |
| Socio-economic status | |||||
| 1 (very low) | 0.59 | 0.039 | 0.000 | 0.51 | 0.67 |
| 2 (low) | 1.37 | 0.058 | 0.000 | 1.24 | 1.47 |
| 3 (middle to low) | 1.34 | 0.056 | 0.000 | 1.23 | 1.44 |
| 4 (middle) | 1.16 | 0.048 | 0.000 | 1.07 | 1.26 |
| 5 (middle to high) | 1.07 | 0.049 | 0.140 | 0.97 | 1.17 |
| 6 (high) | 1.00 | ||||
| Non-registered strata | 0.93 | 0.038 | 0.000 | 0.86 | 0.91 |
| Region | |||||
| Andean | 1.00 | ||||
| Caribbean | 1.06 | 0.015 | 0.000 | 1.03 | 1.10 |
| Pacific | 1.15 | 0.020 | 0.000 | 1.11 | 1.18 |
| Amazonia | 1.23 | 0.050 | 0.000 | 1.13 | 1.33 |
| Orinoquia | 1.08 | 0.040 | 0.000 | 1.01 | 1.16 |
| Non-registered | 0.88 | 0.011 | 0.000 | 0.87 | 0.92 |
IRR, incidence rate ratio; SE, standard error; CI, confidence interval.
a
n = 2 433 304 and chains = 1 404 294.