Table 1

First and second survey of proficiency testing in Italy (1998–1999 and 2000 respectively)

DrugFirst survey, 1998/1999Second survey, 2000
ValueMinMaxValueMinMax
INH
 Sensitivity93.22910096.356100
 Specificity98.510010098.875100
 PVR99.09310099.794100
 PVS91.03810092.536100
 Efficiency94.85010096.865100
 Reproducibility95.08010096.580100
RMP
 Sensitivity94.97010094.050100
 Specificity98.68910096.550100
 PVR98.68910097.467100
 PVS96.27710095.267100
 Efficiency96.78510095.375100
 Reproducibility95.17010095.590100
SM
 Sensitivity87.72010091.975100
 Specificity96.37810089.258100
 PVR96.28210087.558100
 PVS91.45610094.883100
 Efficiency91.76010090.370100
 Reproducibility90.67510090.560100
EMB
 Sensitivity85.5010088.817100
 Specificity93.87510097.575100
 PVR91.46710098.586100
 PVS94.17010090.644100
 Efficiency91.37010092.350100
 Reproducibility86.96010093.070100
  • All data are presented as per cent

  • PVR: positive value of a resistant result

  • PVS: positive value of a susceptible result

  • INH: isoniazid

  • RMP: rifampicin

  • SM: streptomycin

  • EMB: ethambutol