TABLE 5.
Risk estimation of the association between COVID‐19 outcomes and selected independent variables
| Model 1* | Model 2** | Model 3*** | ||||||
|---|---|---|---|---|---|---|---|---|
| Outcomes | Predictors | IRR (95% CI) | P‐value | IRR (95% CI) | P‐value | IRR (95% CI) | P‐value | |
| ICU admission | Age (in years) | 1.02 (1.01 – 1.03) | <0.001 | 1.01 (1.00 – 1.02) | 0.131 | 1.01 (1.00 – 1.02) | 0.061 | |
| Block 1 | Hypertension | 1.50 (1.05 – 2.15) | 0.027 | 1.16 (0.82 – 1.64) | 0.393 | |||
| Diabetes | 0.82 (0.57 – 1.21) | 0.322 | ||||||
| Obesity | 1.09 (0.77 – 1.53) | 0.638 | ||||||
| Block 2 | Periodontitis | 1.43 (1.06 – 1.95) | 0.021 | 1.44 (1.07 – 1.95) | 0.017 | 1.44 (1.07 – 1.94) | 0.017 | |
| DMFT index | 1.03 (0.72 – 1.47) | 0.869 | ||||||
| Eichner index (A versus BC) | 2.09 (1.30 – 3.36) | 0.002 | 1.61 (1.01 – 2.56) | 0.043 | 1.64 (1.03 – 2.60) | 0.038 | ||
| Critical symptoms | Age (in years) | 1.03 (1.01 – 1.04) | <0.001 | 1.02 (1.00 – 1.04) | 0.070 | 1.03 (1.02 – 1.05) | <0.001 | |
| Block 1 | Hypertension | 2.54 (1.28 – 5.03) | 0.007 | 1.57 (0.78 – 3.17) | 0.210 | |||
| Diabetes | 0.86 (0.47 – 1.59) | 0.635 | ||||||
| Obesity | 1.33 (0.74 – 2.40) | 0.348 | ||||||
| Block 2 | Periodontitis | 2.26 (1.29 – 3.99) | 0.005 | 2.56 (1.44 – 4.55) | 0.001 | 2.52 (1.39 – 4.55) | 0.002 | |
| DMFT index | 1.05 (0.56 – 1.98) | 0.868 | ||||||
| Eichner index (A versus BC) | 2.74 (1.21 – 6.19) | 0.015 | 1.51 (0.71 – 3.23) | 0.284 | ||||
| Death | Age (in years) | 1.04 (1.02 – 1.06) | <0.001 | 1.04 (1.01 – 1.06) | 0.003 | 1.04 (1.02 – 1.06) | <0.001 | |
| Block 1 | Hypertension | 2.86 (1.28 – 6.42) | 0.011 | 1.74 (0.71 – 4.26) | 0.224 | |||
| Diabetes | 0.95 (0.48 – 1.93) | 0.888 | ||||||
| Obesity | 1.30 (0.67 – 2.51) | 0.437 | ||||||
| Block 2 | Periodontitis | 1.77 (0.92 – 3.39) | 0.088 | 2.05 (1.12 – 3.76) | 0.020 | 2.02 (1.08 – 3.77) | 0.028 | |
| DMFT index | 1.34 (0.62 – 2.89) | 0.453 | ||||||
| Eichner index (A versus BC) | 2.12 (0.86 – 5.25) | 0.104 | 1.05 (0.47 – 2.35) | 0.897 | ||||
Note: Data are expressed as incidence rate ratio (IRR) (95% confidence intervals) and P‐values. Statistically significant associations (P < 0.05) are highlighted in bold
* Associations between COVID‐19 outcome and predictors within each block.
** Associations between COVID‐19 outcome, age, and significant predictors (P < 0.20) in Model 1.
*** Only statistically significant predictors included in Model 2, controlled by age, using block‐wise criteria.