Table 2.

Univariate analysis of predictive factors of clinical response to granulocyte-monocyte apheresis: Age, White blood cells, erythrocyte sedimentation rate and clinical activity index score, C reactive protein, location duration of disease at baseline and use of immunosuppressant (mean ± SD)

	Responders (n = 40)	Non responders (n = 29)	P-value
Age (yr)	42.7 ± 13.8	41.9 ± 6.6	0.774
WBC 103	10.2 ± 2.7	11.2 ± 2.2	0.106
ESR (mm/h)	30.6 ± 13.5	38.4 ± 12.5	0.017
CAI	8.6 ± 2.1	9.7 ± 2.2	0.039
CRP (mg/dL)	1.2 ± 1.2	1.4 ± 1.4	0.526
Location of disease (left side/pancolitis)	28/12	19/10	0.795
Duration of disease (yr)	11	6	0.581
Use of immunosuppressant	5	15	0.601

CAI: Clinical activity index; ESR: Erythrocyte sedimentation rate; CRP: C reactive protein; WBC: White blood cells.