Table 2.

Number of samples low for analyte for each group examined

	C4	C1 inhibitor (immunochemical)	Functional C1 inhibitor	C4 and functional C1 inhibitor
All samples	144 (n=1022)	133 (n=1141)	309 (n=1138)	100 (n=1018)
First samples	63 (n=806)	67 (n=906)	161 (n=904)	26 (n=805)
All C1inhD samples in study period	80 (n=114)	75 (n=115)	112 (n=114)	79 (n=113)
First C1inhD samples in study period	15 (n=23)	15 (n=23)	22 (n=23)	15 (n=23)
C1inhD samples off treatment	20 (n=20)	17 (n=20)	20 (n=20)	20 (n=20)

C1inhD, C1 inhibitor deficiency; n, number of samples analysed in each group.