Table 2. Comparison between HIV positive patients with and without visual improvement.

Parameters	Visual improvement	No visual improvement	P
Mean ethambutol dose (mg/kg/day)	16.66±1.48	17.59±1.03	0.249
Mean duration of therapy (month)	8±2.82	4.29±6.57	0.032
Mean age (a)	44.5±11.9	51.57±6.57	0.228
Number of patients presenting less than one month after onset of symptoms	4	7	0.001
Number of patients with renal Impairment	1	10	0.43
Mean CD4 count	360	260	0.61