Skip to main content
. 2016 Dec;33:96–101. doi: 10.1016/j.parkreldis.2016.09.023

Table 3.

Validation of the different conversions in the Testing of olfaction in Parkinson's and controls (TOPC) validation dataset.

Analysis Concordance between true score and converted equivalent score Difference between true score and converted equivalent score mean (sd; range) Difference between true score and converted equivalent score median (IQR)
Equipercentile method – converting UPSIT to Sniffin’ 16 0.79 0.66 (2.38; −7 to 7) 1 (−1 to 2)
IRT method – converting UPSIT to Sniffin’ 16 0.80 0.14 (2.42; −7 to 7) 0 (−1 to 2)
Equipercentile method – converting Sniffin’ 12 to Sniffin’ 16 0.97 0.01 (0.96; −2 to 2) 0 (−1 to 1)
Equipercentile method – converting UPSIT to BSIT 0.82 −0.63 (1.44; −4 to 2) −1 (−2 to 0)