Table 1.

Detailed number of procedures performed and patients treated on March-April/January-April 2018, 2019, 2020 and % variation calculated between years.

	2018 Mar–Apr/ Jan–Apr	2019 Mar–Apr/ Jan–Apr	2020 Mar–Apr/ Jan–Apr	Variation % 2020−2018	Variation % 2020−2019
Therapeutic Plasma Exchange
Proc. n.	175/348	198/409	111/313	−15 % ***	−13 % ***
Pt. n.	41/53	46/59	25/51	−28 % **	−29 % **
Extracorporeal Photochemotherapy/Photopheresis
Proc. n.	72/134	38/84	18/61	−24 % **	−16 %
Pt. n.	19/21	11/16	9/12	−15 %	+6 %
Immunoadsorption
Proc. n.	15/27	19/25	0/5	−56 % *	−76 % **
Pt. n.	1/1	2/3	0/1	−100 %	−67 %
Cascade Filtration
Proc. n.	3/8	1/8	0/2	−38 %	−13 %
Pt. n.	1/1	1/1	0/1	−100 %	−100 %
Red Blood Cell Exchange
Proc. n.	14/27	20/33	9/27	−19 %	−27 % *
Pt. n.	8/10	14/16	7/11	−16 %	−24 %
Adsorptive Cytapheresis
Proc. n.	20/36	30/43	2/26	−48 % ***	−62 % ***
Pt. n.	7/10	7/8	2/6	−37 %	−54 %
Cytoreductive Leukapheresis
Proc. n.	5/8	1/3	0/1	−63 %	−33 %
Pt. n.	2/3	1/2	0/1	−67 %	−50 %
Lipoprotein Apheresis
Proc. n.	28/49	35/73	26/55	−10 %	−1 %
Pt. n.	6/7	7/7	6/6	+14 %	0 %
Peripheral Blood Stem Cell Collection (autologous)
Proc. n.	12/34	19/37	17/36	+12 %	−4 %
Pt. n.	11/27	14/29	15/30	+9 %	+2 %
Peripheral Blood Stem Cell Collection (allogeneic)
Proc. n.	2/2	4/4	0/1	−100 %	−100 %
Pt. n.	2/2	3/3	0/1	−100 %	−100 %

Abbreviations: Proc. n.: procedures number; Pt. n.: patients number. Significance p value * <0,5, **<001, ***<0,001.