*3.1. Comparison of Coexisting Diseases and Basic Demographic Data between the Group of People with Systemic Lupus Erythematosus and People without a Diagnosis of Systemic Lupus Erythematosus*

Individuals without a diagnosis of systemic lupus erythematosus significantly more often smoked cigarettes and were more likely to suffer from hypertension (*p* < 0.001, *p* = 0.003, respectively). On the other hand, people with systemic lupus erythematosus were significantly more often female and younger (*p* < 0.001, *p* < 0.001, respectively). A case comparison is presented in Table 1.


**Table 1.** Comparison of selected parameters in patients with and without systemic lupus erythematosus.

Abbreviations: *p*—statistical significance, *n*—number of patients, Me—median, SD—standard deviation.
