Incidence and Predictors of Antiretroviral Treatment Modification in HIV-Infected Adults: A Brazilian Historical Cohort from 2001 to 2010

Table 2

Frequencies of first ART modification and incidence rate by years after the beginning of treatment.

Year of treatment	First ART modification (%)	% of the 236 patients	Incidence rate; (100 person-months)
1st	54 (50.0)	22.9	22.4
2nd	21 (19.4)	8.9	4.0
3rd	13 (12.0)	5.5	1.9
4th	13 (12.0)	5.5	0.8
5th	7 (6.7)	3.0	0.2
Total	108 (100)	45.8	1.4

ART: antiretroviral therapy.