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Table 4 Laboratory results comparisons between uncomplicated and complicated SAB

From: C-reactive protein predicts complications in community-associated S. aureus bacteraemia: a cohort study

Laboratory Result Total Uncomplicated Complicated Comparisona
% [n = 158] % [n = 51] % [n = 107] Crude OR 95% CI p-value
Microbiological tests
 PSSA 18.4 [29] 17.6 [9] 18.7 [20] 1.07 (0.45, 2.56) 0.874
 MSSA 74.1 [117] 74.5 [38] 73.8 [79] 0.97 (0.45, 2.07) 0.928
 nm-MRSA 5.1 [8] 5.9 [3] 4.7 [5] 0.78 (0.18, 3.42) 0.746
    MRSA 2.5 [4] 2.0 [1] 2.8 [3] 1.44 (0.76, 14.22) 0.754
 Poly-microbial 10.8 [17] 17.6 [9] 7.5 [8] 0.38 (0.14, 1.04) 0.061
Blood tests
 C-Reactive protein concentration median (IQR) 144.0 (141.0) [139] 127.0 (129.7) [48] 160.0 (145.6) [91] 1.01 (1.00, 1.01) 0.007
 Platelet cell count median (IQR) 177.5 (138.8) [150] 190.0 (126.5) [49] 175.0 (143.5) [101] 1.00 (0.99, 1.00) 0.346
 White cell count median (IQR) 11.4 (7.8) [150] 10.0 (6.2) [49] 12.1 (9.5) [101] 1.07 (1.01, 1.13) 0.027
 Lymphocyte cell count median (IQR) 0.8 (0.8) [150] 0.8 (0.85) [49] 0.8 (0.7) [101] 0.85 (0.54, 1.33) 0.477
 Neutrophil cell count median (IQR) 9.1 (6.6) [150] 7.4 (6.2) [49] 9.8 (7.5) [101] 1.05 (0.98, 1.13) 0.146
 C-reactive protein concentration over 161 mg/L 40.3 [56] 22.9 [11] 49.5 [45] 3.29 (1.50, 7.24) 0.003
 White blood cell count over 14.85 × 109/L 30.7 [46] 16.3 [8] 37.6 [38] 3.09 (1.31, 7.29) 0.01
 Neutrophil cell count over 9.25 × 109/L 48.7 [73] 36.7 [18] 54.5 [55] 2.06 (1.02, 4.15) 0.043
  1. PSSA penicillin-sensitive S. aureus; MSSA methicillin-sensitive S. aureus; nm-MRSA non-multiple methicillin-resistant S. aureus; MRSA methicillin-resistant S. aureus; IQR interquartile range; OR odds ratio; CI Confidence interval
  2. aUnivariable logistic regression model
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