Table 3.

Multivariate analysis of the association of amino acid changes from the reference sequence HXB2 in the single variable regions of gp120 with early or late R5 strains

Region	Amino acid changes	P value	Odds ratio	95% CI
V1	N136L	0.014	0.02	0.00–0.48
	S144 del	0.026	0.07	0.00–0.73
V2	D187 del	0.002	442.45	10.09–19,386.92
	D187N	0.034	22.88	1.27–410.35
V3	R306G	0.004	0.01	0.00–0.25
V4	S398Q	0.043	25.10	1.10–570.33
V5	E464N	0.015	34.27	2.00–586.66