Table 3. Relative Variation of the Attributable Risk (AR) and the Odds Ratio (OR) in Each Year Compared With the First Year of the Study.
| Year | AR | Relative variation in ARa | Adjusted OR (95% CI) | Relative variation in adjusted ORa |
|---|---|---|---|---|
| Operative mortality | ||||
| 2011 | 1.28 | [Reference] | 1.43 (1.17-1.73) | [Reference] |
| 2012 | 1.21 | −0.07 | 1.38 (1.20-1.58) | −0.05 |
| 2013 | 1.33 | 0.05 | 1.34 (1.17-1.54) | −0.09 |
| 2014 | 1.11 | −0.17 | 1.28 (1.12-1.46) | −0.15 |
| 2015 | 1.20 | −0.08 | 1.41 (1.25-1.58) | −0.02 |
| 2016 | 1.12 | −0.16 | 1.23 (1.09-1.38) | −0.20 |
| 2017 | 1.22 | −0.06 | 1.31 (1.17-1.47) | −0.12 |
| 2018 | 1.29 | 0.01 | 1.32 (1.17-1.48) | −0.11 |
| 2019 | 1.26 | −0.02 | 1.29 (1.15-1.45) | −0.14 |
| 2020 | 1.41 | 0.13 | 1.52 (1.27-1.81) | 0.09 |
| Operative mortality and morbidity | ||||
| 2011 | 1.08 | [Reference] | 1.24 (1.15-1.33) | [Reference] |
| 2012 | 1.02 | −0.06 | 1.14 (1.08-1.20) | −0.10 |
| 2013 | 1.09 | 0.01 | 1.11 (1.06-1.17) | −0.13 |
| 2014 | 1.04 | −0.04 | 1.14 (1.08-1.20) | −0.10 |
| 2015 | 1.02 | −0.06 | 1.11 (1.05-1.16) | −0.13 |
| 2016 | 1.04 | −0.04 | 1.16 (1.11-1.22) | −0.08 |
| 2017 | 1.04 | −0.04 | 1.14 (1.09-1.19) | −0.10 |
| 2018 | 1.03 | −0.05 | 1.08 (1.02-1.13) | −0.16 |
| 2019 | 1.09 | 0.01 | 1.20 (1.15-1.26) | −0.04 |
| 2020 | 1.08 | 0 | 1.18 (1.09-1.27) | −0.06 |
a
The relative variation in each year was obtained by subtracting the attributable risk in the first year of the study from the corresponding year value (eg, for 2022: 1.21 to 1.28 = −0.07).