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Table 1 Comparison of poliovirus prediction models using different infrared regions and virus titers

From: Detection and quantification of poliovirus infection using FTIR spectroscopy and cell culture

Method IR region used h.p.i Virus titers (PFU) Latent variables R2 RMSEC RMSECV
Initial 650 - 1650 cm-1 1.5 0, 102 - 104 4 0.910 0.4225 0.7093
  650 - 1650 cm-1 4 0, 101, 103, 104 3 0.891 0.5225 0.8900
  650 - 1650 cm-1 6 0, 101, 102, 104 6 0.868 0.4914 0.8800
  650 - 1650 cm-1 8 0 - 104 7 0.911 0.4290 0.8471
Revised 650 - 3600 cm-1 8 0 - 104 7 0.819 0.6480 0.9187
  650 - 1650 cm-1 8 0 - 103 7 0.917 0.3298 0.5726
  iPLS 9 regions 8 0 - 103 7 0.903 0.3577 0.5581
  iPLS 9 regions 8 0, 102 - 104 7 0.944 0.4019 0.6628
  iPLS 9 regions 8 0 - 102 7 0.964 0.1640 0.3163
  650-1650 cm-1 12 0 - 103 7 0.716 0.5963 1.2866
  1. Table shows root mean square error of calibration (RMSEC), root mean square error of cross validation (RMSECV) and correlation coefficient for each model.