Table 1. Hazard ratios of CD4 cell count in the first quarter of 1994 for progression to AIDS or death before 1997.

CD4 cell count (cells / μL)	n	Hazard ratio	95% confidence interval	p-value
<200	125	50.79	7.06 - 365.30	<0.01
200 – 349	118	7.73	1.03 - 58.25	0.05
350 – 499	96	2.81	0.33 - 24.01	0.35
≥500	53	1	(reference)