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Table 3 Baseline factors associated with disease relapse using Cox proportional hazards regression models

From: Calprotectin strongly and independently predicts relapse in rheumatoid arthritis and polyarticular psoriatic arthritis patients treated with tumor necrosis factor inhibitors: a 1-year prospective cohort study

Baseline characteristics

Univariate

Multivariate

HR (95% CI; p value)

HR (95% CI; p value)

Calprotectin (μg/mL)

2.38 (1.79–3.16; < 0.0001)

2.74 (1.71–4.41; < 0.0001)

Power Doppler score, 0–66

1.31 (1.18–1.45; < 0.0001)

 

TNFi trough serum levels (μg/mL)

0.47 (0.26–0.88; 0.018)

0.36 (0.10–1.30; 0.120)

DAS-ESR

2.10 (0.72–6.18; 0.175)

 

Time-to-remission (months)

1.17 (1.11–1.23; < 0.0001)

 

Time-in-remission (months)

0.98 (0.97–1.00; 0.087)

 

Female gender

1.25 (0.38–4.15; 0.716)

 

Disease duration (months)

1.02 (0.96–1.08; 0.510)

 

Diagnosis, RA/PsA

2.39 (0.72–7.93; 0.155)

0.80 (0.10–6.30; 0.832)

Age (years)

0.98 (0.94–1.03; 0.535)

 

Monotherapy

0.36 (0.10–1.33; 0.125)

0.51 (0.08–3.35; 0.484)

Steroids

3.12 (1.02–10.1; 0.046)

0.22 (0.04–1.21; 0.082)

  1. Significant values are shown in bold typeface
  2. CI confidence interval, DAS-ESR Disease Activity Score-erythrocyte sedimentation rate, HR hazard ratio, PsA psoriatic arthritis, RA rheumatoid arthritis, TNFi tumor necrosis factor inhibitors