The effect of polymyxin B hemoperfusion on modulation of human leukocyte antigen DR in severe sepsis patients

Table 2 Isolated microorganisms by treatment group

Characteristic	PMX-HP group (n = 29)	Non PMX-HP group (n = 30)	Overall (N = 59)	P value^a
Organism
Gram-positive bacteria	7 (23%)	2 (7%)	9 (15%)	0.15
Gram-negative bacteria	13 (43%)	18 (60%)	31 (53%)	0.20
Fungal infection	1 (3%)	2 (7%)	3 (5%)	1.00
Mycobacterium	1 (3%)	0 (0%)	1 (2%)	1.00
Other	0 (0%)	1 (3%)	1 (2%)	1.00
Site of infection
Central nervous system	2	0	2 (3%)	0.14
Respiratory tract	6	12	18 (31%)	0.11
Gastrointestinal tract	9	6	15 (25%)	0.33
Genitourinary tract	3	3	6 (10%)	0.97
Musculoskeletal	0	3	3 (5%)	0.08
Systemic infection	5	4	9 (15%)	0.68
Other	5	3	8 (14%)	0.42

Data represent sample size and column percentage
PMX-HP polymyxin B hemoperfusion
^aFisher’s exact test for categorical variables; Student’s t test or Kruskal–Wallis test for continuous variables

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