Skip to main content

Table 4 The laboratory profiles in GBS and other bacterial septic arthritis group

From: Group B streptococcus is the most common pathogen for septic arthritis with unique clinical characteristics: data from 12 years retrospective cohort study

Variable

All (231)

GBS group (87)

Other bacterial group (144)

p-value

WBC in synovial fluid (cells/cu.mm.): Median (IQR25-IQR75)

53,000.0 (25,200.0-110,720.0)

54,000.0 (25,600.0-131,000.0)

52,800.0 (24,030.0-106,000.0)

0.640

Hb (mg/dL): Mean ± SD

11.0 + 2.2

11.7 + 2.4

10.5 + 2.1

< 0.001

Serum WBC (cells/cu.mm.): Median (IQR25-IQR75)

13,400.0 (9500.0-18,800.0)

15,000.0 (10,700.0-19,900.0)

12,500.0 (8550.0-16,950.0)

0.029

BUN (mg/dL): Median (IQR25-IQR75)

21.8 (13.8–39.6)

18.4 (12.9–35.1)

24.4 (14.5–43.6)

0.040

Cr (mg/dL): Median (IQR25-IQR75)

1.0 (0.8–2.2)

0.90 (0.8–1.5)

1.20 (0.8–2.5)

0.033

AST (IU/L): Median (IQR25-IQR75)

39.0 (26.5–69.8)

37.0 (25.0–59.0)

42.0 (27.0–71.0)

0.182

ALT (IU/L): Median (IQR25-IQR75)

33.5 (20.0–55.5)

35.0 (24.0–59.0)

32.0 (17.0–54.0)

0.175

ESR (min/hr): Median (IQR25-IQR75)

109.0 (86.0–119.0)

104.5 (85.0–118.0)

111.0 (86.0–119.0)

0.558

hs-CRP (mg/L): Median (IQR25-IQR75)

185.2 (100.8–300.0)

226.9 (142.2–300.0)

157.0 (85.3–267.9)

0.030

Positive hemoculture (n, %)

157, 68%

62, 71.3%

95, 66.0%

0.404

Positive synovial fluid culture (n, %)

155, 67.1%

55, 63.2%

100, 69.4%

0.329

  1. p < 0.05 defined statistical significance, IQR Interquartile range, WBC White blood cell, Hb Hemoglobin, BUN Blood urea nitrogen, AST Aspartate aminotransferase, ALT Alanine Aminotransferase, ESR Erythrocyte sedimentation rate, hs-CRP High Sensitivity C-Reactive Protein, GBS Streptococcus group B