Features and treatment modality of iliopsoas abscess and its outcome: a 6-year hospital-based study

BMC Infectious Diseases

Table 3 Univariate and multivariate analyses of effects of age, sex and clinical variables on mortality rate

	Univariate analysis			Multivariate analysis^a
	HR	95% CI	Pvalue	HR	95% CI	Pvalue
Age (years)	1.05	(1.010-1.083)	0.013*	1.03	(0.986-1.071)	0.204
Sex-female	1.06	(0.421-2.655)	0.905	1.21	(0.369-3.997)	0.749
Gas-forming IPA	2.57	(1.060-6.250)	0.037*	1.93	(0.425-8.804)	0.393
Bilateral IPA	2.28	(0.943-5.524)	0.067	1.76	(0.563-5.481)	0.332
Multiloculated IPA collection pattern	0.85	(0.248-2.938)	0.801
Mean maximal transverse IPA cavity diameter on CT (cm)	0.93	(0.747-1.162)	0.533
DM	1.21	(0.490-2.996)	0.679
Hypertension	0.41	(0.145-1.134)	0.085
CKD	1.22	(0.459-3.265)	0.687
Malignancy	1.34	(0.442-4.057)	0.605
Liver cirrhosis	1.19	(0.346-4.080)	0.785
Fever or hypothermia	1.53	(0.351-6.647)	0.572
Severe sepsis	29.17	(0.215-3952)	0.178
WBC (/μL)	1.00	(1.000-1.000)	0.004*	1.00	(1.000-1.000)	0.109
Bandemia	1.76	(0.722-4.315)	0.213
Hb (g/dL)	0.89	(0.737-1.084)	0.255
Platelet (×10³/μL)	1.00	(0.992-0.999)	0.013*	1.00	(0.992-1.001)	0.109
BUN (mg/dL)	1.01	(1.005-1.017)	0.001*	1.00	(0.983-1.010)	0.623
Creatinine (mg/dL)	1.12	(1.009-1.233)	0.033*	0.93	(0.738-1.178)	0.555
ALT (U/L)	1.00	(0.998-1.002)	0.702
Na (mEq/L)	1.01	(0.946-1.083)	0.721
K (mEq/L)	2.54	(1.442-4.485)	0.001*	1.36	(0.674-2.761)	0.389
CRP (mg/L)	0.98	(0.935-1.021)	0.303
CK (U/L)	1.00	(0.999-1.001)	0.972
Initial blood glucose (mg/dL)	1.00	(0.996-1.003)	0.750
Secondary IPA origin	0.37	(0.149-0.931)	0.035*	0.35	(0.081-1.490)	0.154
Initial treatment
Antibiotics alone	6.49	(2.132-19.753)	0.001*	5.34	(1.266-22.558)	0.023*
PCD	Reference			Reference
Surgery	0.51	(0.098-2.627)	0.418	0.28	(0.039-2.017)	0.207

^aadjusted for age, gender, gas-forming IPA, bilateral IPA, WBC, Platelet, BUN, creatinine, K, secondary IPA origin, and initial treatment.
*P < 0.05.
ALT, alanine aminotransferase; BUN, blood urea nitrogen; CK, creatine kinase; CKD, chronic kidney disease; CRP, C-reactive protein; CT, computed tomography; DM, diabetes mellitus; Hb, hemoglobin; HR, hazard ratio; IPA, iliopsoas abscess; K, potassium; Na, sodium; PCD, percutaneous drainage; SD, standard deviation; WBC, white blood cells.

ISSN: 1471-2334