Table 6.

Data shown univariable risk regression analysis of severe sepsis demonstrated by risk ratio, 95% confidence interval and P-value

Risk factors	RR	95% CI	P–value
Female	1.30	0.86–1.98	0.213
Age ≥60	1.78	1.42–2.24	<0.001
BMI ≤18.50	0.89	0.61–1.31	0.556
BMI ≥30.00	1.13	0.59–2.17	0.720
Primary education	0.66	0.58–0.75	<0.001
Secondary education	0.40	0.14–1.10	0.075
Bachelor’s degree and more	1.11	2.31–5.33	<0.001
Elderly who stay at home	1.40	1.21–1.64	<0.001
Famers/labors	0.77	0.68–0.87	<0.001
Official	0.58	0.35–0.96	0.033
Diabetes	1.19	0.79–1.78	0.401
Heart disease	2.12	1.83–2.44	<0.001
Renal disease	1.90	0.97–3.73	0.062
Cirrhosis	1.57	0.81–3.01	0.180
Hypertension	1.51	1.31–1.74	<0.001
Gout	1.86	1.72–2.21	<0.001
Chronic alcoholism	1.11	0.85–1.45	0.458
Swell	0.87	0.59–1.29	0.494
Erythema	1.78	1.17–2.70	0.007
Bleb	1.71	1.40–2.09	<0.001
Skin necrosis	1.21	1.06–1.38	0.005
Gangrene	1.34	0.95–1.88	0.099
Severe pain	2.15	1.74–2.65	<0.001
Head and neck	1.02	0.14–7.36	0.983
Trunk	1.67	1.32–2.12	<0.001
Upper limb	1.13	0.89–1.14	0.305
Lower limb	0.81	0.77–0.86	<0.001
Fournier’s gangrene	1.27	0.87–1.87	0.213
Multiple site	1.53	0.71–3.34	0.280
Total protein <6 (g/dL)	2.97	2.09–4.21	<0.001
Broad-spectrum antibiotic	1.33	1.08–1.65	0.007

Abbreviations: BP, blood pressure; BMI, body mass index; CI, confidence interval; nd, not defined; PMN, polymorphonuclear neutrophils; RR, relative risk ratio; WBC, white blood cell.