Table 4.

A summary of the subset data taken from the HIV-1 sequence data

				Cluster size
Name	Description	N	G b	1	2–4	≥5
all	Entire set	1517	169	533	108 (311)	61 (673)
men	Only males	1391	152	488	96 (276)	56 (627)
non.sing	Clustered sequences	984	169	0	108 (311)	61 (673)
nsm	Clustered males	903	152	0	96 (276)	56 (627)
big a	Sequences clustered to big a clusters	673	61	0	0 (0)	61 (673)
mibc	Males clustered to big a clusters	627	56	0	0 (0)	56 (627)

The total number of small and large-sized clusters are listed under the headings (2–4) and (≥5). The corresponding number of sequences belonging to each heading is given in parenthesis

^a‘big’ clusters are defined to have ≥5 members

^bthe number of clusters having ≥ 2 members