Table 1. Comparison of intrasubtype/CRF^a genetic distances and subtype distribution.

Subtype/CRF	Kinshasa: mid-1980s			DRC: 1997
	n	Nucleotide distance (%)	% frequency of subtype	n	Nucleotide distance (%)	% frequency of subtype
A	22	15.1	44	84	20.8b	46
C	3	13.1	6	18	18.0b	10
D	10	12.1	20	23	18.7b	13
CRF01-AE	3	9.6	6	4	17.9b	2
G	5	15.6	10	15	20.1b	8
F1	3	10.0	6	7	14.8b	4
H	2	18.7	4	16	23.5	9
J	1	–	2	7	21.2	4
K	1	–	2	7	20.4	4

^aCRF, circulating recombinant forms; DRC, Democratic Republic of Congo.
^bSignificant difference (distances significance test = t test, frequency of subtypes significance test = Fisher exact test).