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Table 1 Formulas to calculate quality indicators and reference values preconized by the Brazilian National Cancer Institute

From: Trend analysis of the quality indicators for the Brazilian cervical cancer screening programme by region and state from 2006 to 2013

Indicators Calculation Reference Values
Productivity rate (%)a \( \frac{\mathrm{number}\kern0.5em \mathrm{of}\kern0.5em \mathrm{exams}\kern0.5em \mathrm{performed}\kern0.5em \left(25\hbox{-} 64\right)}{\mathrm{number}\kern0.5em \mathrm{of}\kern0.5em \mathrm{women}\kern0.5em \left(25\hbox{-} 64\right)}\times 100 \) Not available
% Unsatisfactory \( \frac{\mathrm{number}\kern0.5em \mathrm{of}\kern0.5em \mathrm{unsatisfactory}\kern0.5em \mathrm{exams}\kern0.5em \left(25\hbox{-} 64\right)}{\mathrm{number}\kern0.5em \mathrm{of}\kern0.5em \mathrm{exams}\kern0.5em \mathrm{performed}\kern0.5em \left(25\hbox{-} 64\right)}\times 100 \) 1% (Average of the collected exams in Brazil in 2010)
% Positivity index \( \frac{\mathrm{number}\kern0.5em \mathrm{of}\kern0.5em \mathrm{abnormal}\kern0.5em \mathrm{exams}\kern0.5em \left(25\hbox{-} 64\right)}{\mathrm{number}\kern0.5em \mathrm{of}\kern0.5em \mathrm{satisfactory}\kern0.5em \mathrm{exams}\kern0.5em \left(25\hbox{-} 64\right)}\times 100 \) 3–10%
% ASC-US \( \frac{\mathrm{number}\ \mathrm{of}\ \mathrm{ASC}\hbox{-} \mathrm{US}\ \mathrm{exams}\ \left(25\hbox{-} 64\right)}{\mathrm{number}\ \mathrm{of}\ \mathrm{satisfactory}\ \mathrm{exams}\kern0.5em \left(25\hbox{-} 64\right)}\times 100 \) Not available
% HSIL \( \frac{\mathrm{number}\kern0.5em \mathrm{of}\kern0.5em \mathrm{HSIL}\ \mathrm{exams}\kern0.5em \left(25\hbox{-} 64\right)}{\mathrm{number}\kern0.5em \mathrm{of}\kern0.5em \mathrm{satisfactory}\kern0.5em \mathrm{exams}\kern0.5em \left(25\hbox{-} 64\right)}\times 100 \) 0 5–1 0% (USA, 0.5%; Canada, 0.6%; UK, 1.1%; Norway, 1.1%)
ASC/SIL ratio \( \frac{\mathrm{number}\ \mathrm{of}\ \mathrm{ASC}\ \mathrm{exams}\ \left(25\hbox{-} 64\right)}{\mathrm{number}\ \mathrm{of}\ \mathrm{SIL}\ \mathrm{exams}\kern0.5em \left(25\hbox{-} 64\right)} \) <3
  1. Abbreviations: ASC-US Atypical Squamous Cells of Undetermined Significance, ASC Atypical Squamous Cells, HSIL High-grade Squamous Intraepithelial Lesion, SIL Squamous Intraepithelial Lesion
  2. aNumber of women unavailable for 2013