Table 1 Virological failure and non-resistance rates used in the analysis

Virological failure rates (2 consecutive tests >1000 copies/ml)

   6 months

8500

0.92% (0.71%-1.12%)

   12 months

6979

2.99% (2.59%-3.39%)

   18 months

5782

2.77% (2.34%-3.19%)

   24 months

4672

2.35% (1.92%-2.79%)

   30 months

5094

2.00% (1.62%-2.39%)

   36 months and remaining six-month intervals

3569

2.16% (1.68%-2.63%)

Non-resistance rate among virological failures

109

17.4% (10.31-24.55%)