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Table 1 The demographics and clinical characteristics 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
Female (n, %) 86, 37.2% 36, 41.4% 50, 34.7% 0.311
Age mean: (mean ± SD) 60.8 + 17.3 58.6 + 16.1 62.2 + 18.0 0.136
Body Mass Index: Median (IQR 25-IQR75) 23.4 (20.8–25.8) 23.0 (21.1–25.0) 23.4 (20.8–26.4) 0.608
Season (n, %)
 Summer 47, 20.3% 11, 12.6% 36, 25.0% 0.024
 Rainy 130, 56.3% 62, 71.3% 68, 47.2% < 0.001
 Winter 54, 23.4% 14,16.1% 40, 27.8% 0.042
Underlying disease (n, %) 183, 79.2% 58, 66.7% 125, 86.8% < 0.001
 Rheumatoid arthritis 5, 2.2% 1, 1.1% 4, 2.8% 0.653
 Diabetic mellitus 71, 30.7% 16, 18.4% 55, 38.2% 0.002
 ESRD (n, %) 12, 5.2% 2, 2.3% 10, 6.9% 0.219
 Liver disease 30, 13.0% 4, 4.6% 26, 18.1% 0.003
 Malignancy 28, 12.1% 9, 10.3% 19, 13.2% 0.520
 Hypertension 110, 47.6% 40, 46.0% 70, 48.6% 0.698
 Hyperlipidemia 77, 33.3% 30, 34.5% 47, 32.6% 0.773
History of joint infection (n, %) 7, 3.0% 0, 0% 7, 4.9% 0.047
History skin infection (n, %) 30, 13.0% 1, 1.1% 29, 20.1% < 0.001
History of joint surgery (n, %) 4, 1.7% 1, 1.1% 3, 2.1% 1.000
History of intraarticular steroid injection (n, %) 7, 3.0% 0, 0% 7, 4.9% 0.047
Current medication (n, %)
 Prednisolone 20, 8.7% 4, 4.6% 16, 11.1% 0.088
 Chemotherapy 8, 3.5% 2, 2.3% 6, 4.2% 0.363
 Immunosuppressive drug 9, 3.9% 2, 2.3% 7, 4.9% 0.489
  1. p < 0.05 defined statistical significance, IQR Interquartile range, ESRD End stage renal disease
  2. Rainy season: 16 May – 15 October, Winter season:16 October – 13 February, Summer season:14 February – 15 May