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Supplementary material Ann Rheum Dis Vanarsa K, et al. Ann Rheum Dis 2020;0:1–13. doi: 10.1136/annrheumdis-2019-216312 Supplementary material Ann Rheum Dis Vanarsa et al, Supplementary Table S2 Supplementary Table S2: Patient cohort used for the ELISA validation of urine biomarker candidates Variable All SLE Inactive Active Non-Renal Active Renal (N=62) (N=17) (N=16) (N=29) Age (years) 32.9±9.5 32.8±7.5 42.1±11.3 27.9±4.5 Gender Female, n(%) 62 (100.0%) 17 (100.0%) 16 (100.0%) 29 (100.0%) Ethnicity African-American 58 (93.5%) 16 (94.1%) 13 (81.3%) 29 (100.0%) Caucasian 4 (6.5%) 1 (5.9%) 3 (18.7%) 0 (0.0%) Clinical Assessment SLEDAI 5.9±4.2 0.4±0.8 7.7±3.0 8.1±3.0 rSLEDAI 2.4±2.9 0±0 0±0 5.1±2.1 PGA 1.3±0.8 0.6±0.7 0.8±0.4 2.0±0.6 Laboratory Metrics WBC (X109/L) 6.9±3.3 7.1±2.7 4.3±1.4 8.3±3.6 HGB (g/dl) 11.0±1.5 11.3±1.5 11.3±1.1 10.7±1.7 Platelets (X109/L) 284.0±95.8 235.9±78.9 263.5±62.1 323.2±106.0 C3 (mg/dl) 95.3±34.7 116.5±31.0 87.8±37.5 88.3±31.1 C4 (mg/dl) 18.7±10.2 22.0±8.7 14.9±8.9 19.1±11.1 ESR (mm/h) 43.9±29.2 34.1±26.3 47.9±22.0 47.2±33.5 UrPrCrRatio (mg/mg) 1.2±1.9 0.2±0.1 0.1±0.1 2.5±2.4 Serum Creatinine (mg/dl) 0.9±0.4 0.9±0.5 0.8±0.2 1.0±0.4 Anti-DNA, n(%) 32 (51.6%) 2 (11.8%) 11 (68.8%) 19 (65.5%) Medications Prednisone, n(%) 38 (61.3%) 9 (52.9%) 7 (43.8%) 22 (75.9%) Plaquenil, n(%) 51 (82.3%) 13 (76.5%) 13 (81.3%) 25 (86.2%) Mycophenolate Mofetil, n(%) 32 (51.6%) 8 (47.1%) 9 (56.3%) 15 (51.7%) Tacrolimus, n(%) 1 (1.6%) 0 (0.0%) 1 (6.3%) 0 (0.0%) Azathioprine, n(%) 7 (11.3%) 1 (5.9%) 2 (12.5%) 4 (13.8%) Cyclophosphamide, n(%) 2 (3.2%) 0 (0.0%) 0 (0.0%) 2 (6.9%) Methotrexate, n (%) 2 (3.2%) 0 (0.0%) 1 (6.3%) 1 (3.4%) Abbreviations used: PGA, physician global assessment; UrPrCr ratio, urine protein to creatinine ratio. Vanarsa K, et al. Ann Rheum Dis 2020;0:1–13. doi: 10.1136/annrheumdis-2019-216312 Supplementary material Ann Rheum Dis Supplementary Table S3: Well documented biomarker proteins rediscovered by the screen Molecule FC SLE/HC p value (t test) Supplementary References Albumin 2.0 0.075 S3, S4 ALCAM 1797.9 0.072 S47, S48 Angiostatin 160.9 0.105 S29 Calreticulin 4.6 0.1 S44 CD163 N/A* 0.08 S10, S11 CD30 20.5 0.008 S51 CXCL16 15.9 0.008 S20, S21 Cystatin S 3.0 0.185 Cystatin SA 1.7 0.529 Cystatin SN 0.4 0.313 E-Selectin 3.9 0.002 S37 Ferritin 187.0 0.001 S49, S50 FOLR1 1.4 0.517 ICAM-1 6.8 0.019 S1, S2 IL-12p40 N/A* 0.3 S35, S36 IL-15 4.1 0.47 S13, S14 IL-6 0.1 0.126 S5, S6 IP-10 43.1 0.013 S22, S23 I-TAC 2.5 0.137 Leptin 3.1 0.024 S12 Lipocalin-1 3.1 0.055 Lipocalin-2 3.2 0.012 S28 L-Selectin 16.7 0.013 MCP-1 7.8 0.089 S7 MCSF 1.5 0.344 S15, S16 MCSF R 51.9 0.008 MIP-3a 49.8 0.13 S27 MIP-3b 8.8 0.04 S45 OPG 52.0 0.002 S33, S34 OPN 7.2 0.004 S18, S19 PF4 43.1 0.109 S40, S41 RAGE 10.7 0.1 S26 RANTES 16.7 0.01 S42, S43 Resistin 8.1 0.015 S46 SDF-1a 9.1 0.249 S32 TFPI 397.8 0.027 S8, S9 TNF RI 3.7 0.038 S17 TNF RII 3.2 0.025 TREM-1 21.7 0.099 S38, S39 TWEAK 4.4 0.105 S30, S31 TWEAK R 1.5 0.743 uPA 3.7 0.004 VCAM-1 49.0 0.068 S24, S25 N/A, not available. * indicates FC was not calculated due to average of healthy control is 0. 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