Table 2. – Statistical analysis of the reduction in the number of procedures and surgeries in March to May of 2019 and 2020 and their comparison.
| Number of procedures | Percent difference 2020 - 2019 | Number of procedures estimated for 2020 (March-May) | Confidence interval (95% CI) | p-value | ||
|---|---|---|---|---|---|---|
| 2019 March-May | 2020 March-May | |||||
| Procedures | ||||||
| Adult cardiac catheterization | 61 502 | 44 652 | -27% | 63 823 | 68 921 – 58 724 | 0.0041 |
| Echocardiography | 530 448 | 307 221 | -42% | 568 014 | 599 663 – 536 364 | 0.0009 |
| Electrocardiography | 3 624 680 | 2 153 969 | -41% | 3 795 712 | 3 952 567 – 3 638 856 | 0.0005 |
| Pacemaker implantation | 5 993 | 5 315 | -11% | 6 129 | 6 711 – 5 546 | 0.0276 |
| ABPM | 498 923 | 127 730 | -74% | 609 445 | 748 875 – 470 014 | 0.0048 |
| Holter monitoring | 79 792 | 38 815 | -51% | 84 592 | 93 971 – 75 212 | 0.0024 |
| Exercise test | 137 678 | 56 501 | -59% | 134 673 | 149 970 – 119 375 | 0.0022 |
| All | 4 939 016 | 2 734 203 | -45% | 5 262 388 | 5 516 598 – 5 008 177 | 0.0006 |
| Surgeries | ||||||
| Cardiovascular | 23 907 | 20 744 | -13% | 24 045 | 26 897 – 21 191 | 0.0388 |
| Vascular | 101 694 | 83 786 | -18% | 104 654 | 159 586 – 49 720 | 0.1914 |
| Endovascular | 37 547 | 25 461 | -32% | 38 208 | 45 145 – 31 269 | 0.0165 |
| All | 163 148 | 129 991 | -20% | 166 906 | 218 270 – 115 540 | 0.0854 |
| TOTAL | 5 102 164 | 2 864 194 | -44% | 5 429 294 | 5 670 710 – 5 187 876 | 0.0005 |
ABPM: ambulatory blood pressure monitoring. Confidence intervals and p-values calculated by using Student t distribution, considering the differences between the value projected and the value recorded in 2020.