Incident cases of systemic lupus erythematosus per million population in Brazilian macroregions according to the periods 2017–2019 versus 2020
| Macroregions of Brazil | 2017–2019 Incidence rate (95% CI) | 2020 Incidence rate (95% CI) | Incidence ratio (95% CI) | P value |
| North | 69.4 (65 to 73) | 118.9 (114 to 124) | 1.71 (1.59 to 1.83) | <0.001 |
| Northeast | 89.2 (86 to 91) | 186.4 (183 to 190) | 2.08 (2.02 to 2.16) | <0.001 |
| Southwest | 115.9 (113 to 118) | 163.2 (160 to 165) | 1.40 (1.37 to 1.44) | <0.001 |
| South | 157.3 (152 to 162) | 194.2 (189 to 199) | 1.23 (1.18 to 1.28) | <0.001 |
| Midwest | 118.6 (113 to 124) | 196.4 (189 to 203) | 1.65 (1.56 to 1.75) | <0.001 |
| Total | 111.6 (110 to 113) | 171.7 (170 to 174) | 1.54 (1.52 to 1.57) | <0.001 |