Table 2.

Description of patients and matched control subjectsa

ANCA-SVV Patients (n = 65)ANCA-SVV Control Subjects (n = 65)SLE Nephritis Patients (n = 51)SLE Nephritis Control Subjects (n = 51)
aANCA, anti-neutrophil cytoplasmic autoantibody; SVV, small-vessel vasculitis; SLE, systemic lupus erythematosus.
bSilica dust exposure was statistically more frequent among patients with ANCA-SVV (P = 0.001) and statistically less frequent among patients with SLE nephritis (P = 0.047) than among disease-matched control subjects.
cExposure to gasoline or other fuels was statistically more frequent among patients with SLE nephritis than among control subjects (P = 0.008).
Demographic features
age (yr) (mean ± SD)54 ± 1655 ± 1634 ± 1435 ± 13
white race (%)97976060
male gender (%)51512525
Percent exposed to
silicab46201225
smoking (previous or current)48522337
gasoline or other fuelsc1616192
pesticides or extermination chemicals171085
cleaning agents, solvents, or degreasers16131418
glues or adhesives6526
paint or paint products1613611
dry-cleaning chemicals5242