Table 2. Mutations in HIV protease gene after previous virological failure (VF) on protease inhibitor-based regimen.

Protease mutations after previous VF on PI-based regimen (n = 158/205)	n (%)
Wild type	59 (37.3)
Only mm (M, 2; range, 1–7)	48 (30.3)
1 MM (L90M, 25; D30N, 11; V82A, 2; N88S, 2; I50L/V, 2) + mm (M, 3; range, 0–8)	42 (26.6)
2 MM (V82A + L90M, 5; I84V + L90M, 2; N88S + L90M, 2; V82A + I84V, 1; D30N
+ N88S, 1; I54L + L90M, 1;) + mm (M, 6; range, 4–10)	12 (8.6)

PI, protease inhibitor. mm, protease minor mutations. MM, HIV protease major mutations; M, median. Specific major protease mutations in brackets.