Table 2

Quality of artemisinin-containing antimalarials at 76 outlets visited during both the island-wide survey using mystery client and the randomised-overt survey on Bioko Island, Equatorial Guinea

VariableSampling methodp Value
Island-wide survey-mystery clientRandomised-overt survey
Outlets76 of 174 (43.7%)76 of 88 (86.4%)
Samples170245
Brands44 (64.7%)58 (85.3%)0.0057*
Authentic154 (90.6%)227 (92.7%)0.45
Substandard2 (1.2%)6 (2.4%)0.35
Degraded00
Falsified14 (8.2%)12 (4.9%)0.17
  • Total number of brands purchased=68.

  • *Significant difference.