Table 4.

Trend of Second-Line Regimen Switching, by Year from 2010 to 2017 (n = 53,074)^a

	2010	2011	2012	2013	2014	2015	2016	2017
Total # of active ART patients	3913	8943	16,003	24,099	31,077	35,610	32,363	29,077
# of switching patients	21	32	58	295	306	373	344	279
% of patients switched	0.54%	0.36%	0.36%	1.22%	0.98%	1.05%	1.06%	0.96%
# of switching patients with unsuppressed VL status	0	0	0	22	48	83	171	230
% of patients switching with unsuppressed VL status	0	0	0	7.46%	15.69%	22.25%	49.71%	82.44%

^a Among ART patients with at least 18 months of follow-up time (see Table 1 for characteristics of 53,074 ART patients). Year 2017 includes data from January –September (9 months) only. VL status refers to status prior to switching