Table 2: Cystic fibrosis mutation distribution by continent

		Total CF chromosomes screened																										Fraction of mutations detected (%)
Europe, North		21,154		30	62	97	15	53	18	55	35	57	14,866	160	439	18	356	165	40	41	14	27	36	39	23	120	209	80.2
Europe, South		7,281		14	3	37	13	2	21	24	0	5	4,007	65	259	2	37	44	0	10	7	10	68	1	8	43	179	66.7
America, North		10,438		16	61	154	21	1	12	26	27	20	6,900	44	234	5	206	96	24	2	8	17	19	14	57	245	130	79.9
America, South/Central		758										2	342		38	1	1	5									11	52.8
Australasia		3,095			7	27		1	2	1		9	2,309	12	56	3	117	11	3				2			6	23	83.7
Asia, mainly Middle East		608		7	0							0	173	3	27	0	0	0	0						16	120	29	61.7
Africa		515											351		9	1		1								2	8	72.2
Relative frequency (%)				0.2	0.3	0.7	0.1	0.1	0.1	0.2	0.1	0.2	66.0	0.6	2.4	0.1	1.6	0.7	0.1	0.1	0.1	0.1	0.3	0.1	0.2	1.2	1.3

Footnote to Table 2:

The information listed in this table is based on the data shown in Table 1 and is intended for comparative purpose. As not all centers have screened for all 24 mutations, the actual relative frequency for some may be slightly higher. There may also be a small number of overlapping samples which are reported more than once.