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Table 2 viral suppression of viral load < 40 copies/ml in both regimens. The probability of achieving viral load < 40 copies/ml was evaluated at 24 and 48 weeks in efavirenz and nevirapine regimen based on the relative risk ratio

From: Rate of viral load change and adherence of HIV adult patients treated with Efavirenz or Nevirapine antiretroviral regimens at 24 and 48 weeks in Yaoundé, Cameroon: a longitudinal cohort study

  EFV NVP
At 24 weeks At 48 weeks At 24 weeks At 48 weeks
Patients (n) 28 (26.0%) 52 (52.0%) 12 (14.2%) 48 (60%)
Cumulative incidence 0.3 0.6 0.2 0.8
Relative Risk 1.7 0.8 0.5 1.2
% relative effect 75.0% increase 18.7% decrease 43.0% decrease 23.0% increase
  1. Abbreviations: EFV Efavirenz, NVP Nevirapine, n number of patients