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Table 3 Summary statistics of PCV2 viral loads and estimated Spearman’s correlation coefficients (ρ) between oral fluid and serum pools from two finishing herds

From: Comparison of serum pools and oral fluid samples for detection of porcine circovirus type 2 by quantitative real-time PCR in finisher pigs

PCV2 viral load Sampling no. Sample type Mean Median Standard deviation Min Max Wilcoxon
(p-value)c
Spearman’s correlation
          ρ p-valuec
Herd 1 1 Seruma 4.82 5.86 2.47 0 6.97 <0.001 0.69 <0.001
(n = 50)   OFb 6.92 8.13 2.92 0 8.99    
Herd 2 1 Serum 3.89 4.99 2.96 0 8.29 <0.001 0.39 0.001
(n = 65)   OF 7.09 7.37 1.07 4.1 8.89    
  2 Serum 6.43 6.51 0.86 3.96 8.76 <0.001 0.14 0.278
   OF 7.98 8.03 0.73 4.80 9.26    
  3 Serum 5.69 5.79 0.96 0 7.43 <0.001 0.04 0.725
   OF 6.97 7.03 0.51 5.56 8.13    
  4 Serum 5.09 5.19 0.56 3.74 7.28 <0.001 0.08 0.524
   OF 6.37 6.37 0.51 4.67 7.43    
  1. aSerum = serum pool, bOF = oral fluid, csignificance level is 0.005 due to Bonferroni correction