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Table 5 Sensitivity analysis: factors associated with mixed proliferative LN (classes III + V and IV + V, n = 28) vs membranous LN (class V, n = 18)

From: Non-histologic factors discriminating proliferative lupus nephritis from membranous lupus nephritis

 

Univariable analysis

Multivariable analysis (model 1)

Multivariable analysis (model 2)

 

OR (95% CI)

p

OR (95% CI)

p

OR (95% CI)

p

Age

0.965 (0.920–1.012)

0.142

    

Female sex

1.625 (0.208–12.705)

0.644

    

Hypertension

0.955 (0.228–3.995)

0.949

    

Diabetes mellitus

N/A

> 0.999

    

Mucocutaneous manifestations

0.709 (0.180–2.792)

0.623

    

Musculoskeletal manifestations

1.667 (0.370–7.515)

0.506

    

Neuropsychiatric manifestations

0.600 (0.107–3.363)

0.561

    

Serositis

1.308 (0.110–15.570)

0.832

    

Hematologic manifestations

2.368 (0.544–10.317)

0.251

    

Positive anti-Sm Ab

0.400 (0.116–1.376)

0.146

    

Positive anti-Ro Ab

0.552 (0.165–1.838)

0.333

    

Positive anti-La Ab

1.364 (0.294–6.319)

0.692

    

Positive anti-U1RNP Aba

0.286 (0.075–1.086)

0.066

    

Positive anti-dsDNA Abb

4.600 (1.207–17.524)

0.025

4.545 (1.107–18.661)

0.036

1.003 (0.999–1.007)

0.159

Positive lupus anticoagulant

2.000 (0.452–8.841)

0.361

    

Positive anti-β2 glycoprotein I Ab

0.433 (0.099–1.900)

0.267

    

Positive anti-cardiolipin Ab

1.364 (0.294–6.319)

0.692

    

Low C3a

3.818 (0.922–15.808)

0.065

    

Low C4a

1.333 (0.406–4.379)

0.635

    

Albumin level

0.866 (0.435–1.721)

0.680

    

Creatinine level

5.076 (0.446–57.756)

0.190

    

GFR

0.988 (0.968–1.009)

0.273

    

Urine PCR

1.002 (0.985–1.020)

0.808

    

Urine RBC of ≥ 5/HPF

3.929 (1.122–13.755)

0.032

3.326 (0.559–19.795)

0.187

2.402 (0.464–12.428)

0.296

Urine WBC of ≥ 5/HPF

3.091 (0.895–10.672)

0.074

    

Urine cast

4.636 (0.509–42.246)

0.174

    

SLEDAI-2K

1.134 (1.015–1.266)

0.026

1.020 (0.872–1.195)

0.801

1.074 (0.935–1.233)

0.315

  1. Ab antibody, anti-dsDNA anti-double-stranded DNA, GFR glomerular filtration rate, PCR protein/creatinine ratio, RBC red blood cell, HPF high power field, WBC white blood cell, SLEDAI-2K Systemic Lupus Erythematosus Disease Activity Index 2000, OR odds ratio, CI confidence interval, N/A not applicable
  2. aAnalyzed as binary variables (anti-U1RNP Ab, positive/negative; C3, low/not low; C4, low/not low) in univariable analysis
  3. bAnalyzed as binary variables (Anti-dsDNA Ab, positive/negative) in univariable analysis and multivariable analysis (model 1) and analyzed as continuous variables in multivariable analysis (model 2)