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Table 2 Summary of the ARV Class Combinations Comprising the Salvage ARV Regimens

Type 1 Regimens NRTIs, NNRTIs, and/or PIs		Type 2 Regimens Raltegravir (RAL), enfuvirtide (ENF), and/or Maraviroc (MVC)
ARV Class Combination	No. TCE	ARV Class Combination	No. TCE
2 NRTIs + PI/r	364	≥1NRTI + PI/r + RAL	37
≥3 NRTIs + PI/r	194	≥1NRTI + PI/r + ENF	30
2 NRTIs + NNRTI	149	≥1NRTI + NNRTI + PI/r + RAL	13
1 NRTI + NNRTI + PI/r	102	≥1NRTI + NNRTI + PI/r + ENF	7
2 NRTIs + NNRTI + PI/r	90	≥1NRTI + RAL	7
2 NRTIs + PI	90	≥1NRTI + PI/r + RAL + ENF	6
≥3 NRTIs + NNRTI	79	PI/r + RAL	5
≥3 NRTIs	62	PI/r + RAL + MVC	5
1 NRTI + NNRTI + PI	49	≥1NRTI + NNRTI + RAL	4
1 NRTI + PI/r	45	≥1NRTI + PI/r + RAL + MVC	4
2 NRTIs + NNRTI + PI	44	≥1NRTI + RAL + MVC	4
≥3 NRTIs + PI	36	NNRTI + PI/r + RAL	3
≥3 NRTIs + NNRTI + PI/r	25	≥1NRTI + NNRTI + PI + ENF	2
NNRTI + PI	19	≥1NRTI + NNRTI + RAL + ENF	2
≥3 NRTIs + NNRTI + PI	9	≥1NRTI + PI/r + MVC	2
PI/r	3	≥1NRTI + PI/r + MVC + ENF	2
		NNRTI + RAL + MVC	2
Miscellaneous	22	Miscellaneous	10
Total	1,382	Total	145

Fewer than 10 individuals received a double-boosted PI either as part of a Type 1 or Type 2 Regimen. The PI component in these individuals was denoted here as PI/r.
To avoid subdividing the Type 2 Regimens into too many small categories, no distinction was made based on the number of NRTIs in the regimen.
Abbreviations: NRTIs nucleoside RT inhibitors, NNRTIs non-nucleoside RT inhibitors, PIs protease inhibitors, PI/r ritonavir-boosted PIs.

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