Table 1. CD4+ counts and changes in mortality and health-related quality of life values used for the base case analysis.

CD4+ cellsa	IRRb	QALYc
>450	1	0.98
400–450	1.41	0.96
300–399	1.45	0.94
200–299	1.66	0.94
100–199	2.59	0.87
50–99	4.63	0.81
0–49	11.63	0.79

^aNumber of CD4+ cells per micro liter.

^bIncidence rate ratio.

^cQuality-adjusted life years.