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Table 4 Spearman correlation (ρ) between baseline continuous and categorical variables

From: Serum levels of 14-3-3η protein supplement C-reactive protein and rheumatoid arthritis-associated antibodies to predict clinical and radiographic outcomes in a prospective cohort of patients with recent-onset inflammatory polyarthritis

Baseline variables 14-3-3η 14-3-3η 14-3-3η Anti-CCP2 Anti-CCP2-positive RF RF positive Age (years) Age ≥65 years BMI ≥30
   ≥0.19 ≥0.50        
14-3-3η 1          
14-3-3η ≥ 0.19 0.865 *** 1         
14-3-3η ≥ 0.50 0.833 *** 0.808 *** 1        
Anti-CCP2 0.529 *** 0.515 *** 0.530 *** 1       
Anti-CCP2-positive 0.529 *** 0.524 *** 0.539 *** 0.849 *** 1      
RF 0.716 *** 0.659 *** 0.731 *** 0.624 *** 0.638 *** 1     
RF positive 0.669 *** 0.616 *** 0.679 *** 0.616 *** 0.661 *** 0.927 *** 1    
Anti-Sa positive 0.409 *** 0.413 *** 0.437 *** 0.527 *** 0.519 *** 0.500 *** 0.481 ***    
Age (years) -0.140 * -0.118 * -0.087 -0.033 -0.085 -0.069 -0.104 1   
Age ≥65 years -0.151 ** -0.131 * -0.103 -0.040 -0.095 -0.071 -0.099 0.836 *** 1  
BMI ≥30 -0.028 0.042 0.007 -0.031 -0.013 -0.014 -0.039 -0.06 -0.024 1
Gender (women vs men) -0.031 -0.034 -0.074 -0.010 -0.033 -0.044 -0.030 -0.158 ** -0.072 0.000
Symptom duration (months) 0.119 * 0.127 * 0.122 * 0.144 0.164 0.146 0.141 -0.067 -0.032 -0.002
Current smoker 0.137 * 0.075 0.110 * -0.022 0.005 0.091 0.112 -0.221 *** -0.206 *** -0.068
M-HAQ 0.024 0.009 0.000 -0.030 -0.064 -0.024 -0.053 0.112 * 0.032 0.138 *
DAS28-CRP 0.061 0.052 0.077 0.023 -0.009 0.064 0.013 0.135 ** 0.101 0.048
SDAI 0.041 0.033 0.067 0.009 -0.024 0.050 -0.006 0.112 ** 0.089 0.02
Pain 0.012 -0.004 -0.011 0.029 0.003 0.051 0.043 0.011 0.014 0.124 *
ESR 0.044 0.059 0.076 0.035 0.007 0.089 0.067 0.267 *** 0.196 *** 0.115 *
CRP 0.000 -0.011 0.023 0.014 0.021 0.015 -0.009 0.151 ** 0.091 0.091
CRP >8 -0.02 -0.021 0.008 0.002 0.008 -0.015 -0.029 0.091 0.048 0.028
SJC28 0.019 0.010 0.055 -0.019 -0.059 0.036 0.000 0.094 0.084 -0.043
TJC28 0.082 0.080 0.103 0.008 -0.022 0.065 0.005 0.124 * 0.102 0.009
Total SvH score 0.036 0.051 0.049 0.009 0.024 0.026 -0.005 0.491 *** 0.391 *** 0.013
SvH erosion score 0.04 0.035 0.052 0.021 0.049 0.050 0.022 0.360 *** 0.287 *** 0.02
  1. *p <0.05, **p <0.01, ***p <0.001. Anti-CCP2 antibodies against citrullinated peptides, second generation, RF rheumatoid factor, BMI body mass index, M-HAQ Modified Health Assessment Questionnaire, DAS28 Disease Activity Score in 28 joints, SDAI Simplified Disease Activity Score, ESR erythrocyte sedimentation rate, CRP C-reactive protein, SJC swollen joint count, TJC tender joint count, SvH progression in the total Sharp score modified by van der Heijde