Table 5 Descriptive statistics of the regarded data set from the SALIA study stratified according to the status of rheumatic diseases

N

394

123

Mean age

[years] ± sd

\(70.87 \pm 3.16\)

\(71.50 \pm 2.96\)

Mean BMI

[kg/m²] ± sd

\(26.42 \pm 3.93\)

\(27.46 \pm 3.86\)

N Currently smoking

\(21\ (5.44\%)\)

\(5\ (4.07\%)\)

N Formerly smoking

\(61\ (15.80\%)\)

\(15\ (12.20\%)\)

Mean pack-years of smoking

[years] ± sd

\(3.78 \pm 10.92\)

\(2.85 \pm 9.25\)

Mean \({\mathrm {NO}}_2\)

[μg/m³] ± sd

\(26.66 \pm 7.34\)

\(27.94 \pm 7.69\)

Mean \({\mathrm {NO}}_x\)

[μg/m³] ± sd

\(41.34 \pm 17.71\)

\(44.10 \pm 17.68\)

Mean \({\mathrm {PM}}_{10}\)

[μg/m³] ± sd

\(26.99 \pm 2.16\)

\(27.39 \pm 2.42\)

Mean \({\mathrm {PM}}_{\mathrm {coarse}}\)

[μg/m³] ± sd

\(9.52 \pm 1.66\)

\(9.81 \pm 1.84\)

Mean \({\mathrm {PM}}_{2.5}\)

[μg/m³] ± sd

\(17.94 \pm 1.38\)

\(18.23 \pm 1.50\)

Mean \({\mathrm {PM}}_{2.5 \ {\mathrm {absorbance}}}\)

[μg/m³] ± sd

\(1.47 \pm 0.46\)

\(1.58 \pm 0.59\)