TABLE 2.

Prior antiretroviral treatment of the patients in this study

Patient	No. of prior antiretroviral regimens	No. of years on antiretroviral regimens	Antiretroviral compound(s) not received in prior regimens
			NRTIsa	NNRTIsb	PIsc
1	8	10	None	Efavirenz	Amprenavir
2	17	6	Zalcitadine	Nevirapine	None
3	21	10	None	None	None
4	14	8	None	None	Indinavir
5	11	7	None	None	Lopinavir
6	13	7	Zalcitadine	Nevirapine, efavirenz	Lopinavir
7	14	11	Abacavir	Efavirenz	Amprenavir
8	9	7	None	Nevirapine, efavirenz	Nelfinavir
9	11	7	Zalcitadine	None	Indinavir
10	23	6	None	None	None
11	12	12	None	None	Nelfinavir
12	16	8	Zalcitadine	None	None
13	36	9	None	None	None
14	8	4	Zalcitadine	Nevirapine	Saquinavir, nelfinavir
15	10	8	None	Efavirenz	Saquinavir, lopinavir
16	4	7	None	None	Indinavir, nelfinavir
17	17	6	Zalcitadine	None	None
18	13	6	Abacavir	None	Amprenavir
19	19	8	None	Nevirapine	None

^aZidovudine, didanosine, zalcitadine, lamivudine, stavudine, and abacavir.

^bNevirapine and efavirenz.

^cSaquinavir, ritonavir, indinavir, nelfinavir, amprenavir, and lopinavir/ritonavir.