Reactive-paper test kits were used to determine
ChE levels among the study and control
groups. The kits were composed of reagent
paper, needle, lancet, capillary tubes, glass
slides, alcohol, and standard-color paper.
The reactive-paper test kit was supplied by
the Government Pharmaceutical Organization of
Thailand. The sensitivity, specificity, and positive
predictive values of test were 77%, 90%,
and 85%.21 Background information on the
colorimetric strip method of qualitative testing
for cholinesterase with reactive paper, by