Table 1. Statistical analysis of the number of procedures in the months from March to December, comparing the years 2019 and 2020.
| March to December 2019 | March to December 2020 | % difference | Estimated number of procedures | (CI > 95%) | p-value | |
|---|---|---|---|---|---|---|
| Laboratory tests | ||||||
| Biopsy | 2,164 | 1,874 | -13% | 2,123 | 2,292 - 1,954 | 0.0011 |
| Bronchoalveolar Lavage | 4,254 | 2,810 | -34% | 4,253 | 7,972 - 533 | 0.0405 |
| Total | 6,418 | 4,684 | -27% | 6,376 | 10,104 - 2,647 | 0.0001 |
| Imaging exams | ||||||
| Bronchography | 6 | 6 | 0% | 5 | 51 - 0 | 0.4469 |
| Bronchoscopy | 18,882 | 11,433 | -39% | 19,051 | 21,692 - 16,409 | 0.0002 |
| Scintigraphy | 3,949 | 1,725 | -56% | 3,854 | 2,783 - 4,925 | 0.0005 |
| Thoracic MRI | 12,576 | 13,289 | 6% | 12,363 | 7,891 - 16,834 | 0.1302 |
| Thorax X-ray | 15,652,349 | 11,951,513 | -24% | 15,745,559 | 14,861,700 - 16,629,416 | 0.0000 |
| Thorax CT | 758,520 | 1,447,082 | 91% | 819,941 | 747,732 - 892,148 | 0.0000 |
| Tracheoscopy | 15,385 | 10,291 | -33% | 16,284 | 15,917 - 16,651 | 0.0000 |
| Chest ultrasound | 18,238 | 9,623 | -47% | 22,086 | 14,061 - 30,110 | 0.0010 |
| Video thoracoscopy | 906 | 817 | -10% | 974 | 807 - 1,139 | 0.0040 |
| Total | 16,480,811 | 13,445,779 | -18% | 16,640,118 | 15,688,098 - 17,592,137 | 0.0001 |
| Respiratory function tests | ||||||
| Spirography | 75,061 | 20,187 | -73% | 74,574 | 70,898 - 78,248 | 0.0000 |
| Spirometry | 10,087 | 2,514 | -75% | 6,909 | 0 - 15,697 | 0.0222 |
| Respiratory function | 307,189 | 112,967 | -63% | 325,002 | 312,167 - 337,836 | 0.0000 |
| Total | 392,337 | 135,668 | -65% | 406,485 | 389,782 - 423,186 | 0.0000 |
| Blood Gases (Total) | 1,658,394 | 2,206,684 | 33% | 1,714,176 | 1,362,836 - 2,065,516 | 0.0013 |
| Grand Total | 18,537,960 | 15,792,815 | -15% | 18,767,155 | 17,551,319 - 19,982,990 | 0.0002 |
MRI: magnetic resonance imaging; CT: computed tomography.