Exploring the arthritogenicity of Streptococcus dysgalactiae subspecies equisimilis

BMC Microbiology

Table 1 Clinical characteristics of the patient cohorts

Clinical characteristic	OAI n = 29		Non-OAI n = 24		P-value
Demography
Age, median (IQR)	67	(49–81)	80	(65–89)	0.06
Male sex	20	(68%)	8	(33%)	0.01
Systemic comorbidity
CCI, median (IQR)	1	(0–3)	2	(1–4)	0.004
Chronic organ failure	10	(34%)	12	(50%)	0.28
Diabetes	4	(14%)	3	(13%)	1.0
Active Malignancy	3	(10%)	5	(21%)	0.44
Immunosuppression	3	(10%)	7	(29%)	0.16
Local risk factors
Orthopaedic implant	9	(31%)	16	(67%)	0.01
Pre-existing joint disease	5	(17%)	10	(42%)	0.07
Surgical proc. < 4 weeks	7	(24%)	1	(4%)	0.06
Previous septic arthritis	8	(28%)	2	(8%)	0.09

OAI Osteoarticular infection, CCI Charlson comorbidity Index, IQR Inner quartile range; Surgical proc. < 4 weeks, invasive joint procedure performed within 4 weeks prior to admission. Chronic organ failures included any of cardiac, renal, respiratory and hepatic failures. All data presented as n (% of cases), except Age and CCI, presented as median (IQR). Significant P-values are highlighted in bold

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