Table 1.
Accuracy (% correct at each day) of age-grading mosquitoes using near-infrared spectroscopy and a partial least squares regression (PLS) cross-validation
| Strains | Preserved/Fresh | No. PLS Factors | n | 1d | 5d | 7d | 9d | 12d | 14d | 15d | 21d | <7d1 | ≥7d1 | Total1 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KGB An. arabiensis | Fresh | 6 | 151 | 89.5 | 51.4 | 75.0 | 100 | 70.7 | 88.2 | 79.5 | ||||
| KGB An. arabiensis | Preserved | 6 | 153 | 92.5 | 81.6 | 62.9 | 97.5 | 87.2 | 81.3 | 84.3 | ||||
| Dongola An. arabiensis | Fresh | 6 | 127 | 87.5 | 59.3 | 86.5 | 97.4 | 72.5 | 92.1 | 84.3 | ||||
| Dongola An. arabiensis | Preserved | 5 | 123 | 95.7 | 80.0 | 94.9 | 100 | 87.5 | 97.3 | 93.5 | ||||
| Ifakara An. arabiensis | Fresh | 6 | 205 | 100 | 64.4 | 90.2 | 100 | 91.1 | 78.1 | 93.9 | 88.3 | |||
| Ifakara An. arabiensis | Preserved | 8 | 123 | 100 | 68.2 | 90.9 | 84.8 | 90.0 | 94.8 | 88.3 | 87.0 | |||
| G3 An. gambiae s.s. | Fresh | 5 | 150 | 100 | 33.3 | 92.1 | 100 | 65.3 | 96.0 | 80.7 | ||||
| G3 An. gambiae s.s. | Preserved | 5 | 145 | 96.9 | 68.4 | 97.4 | 97.3 | 81.4 | 97.3 | 89.7 | ||||
| CDC An. gambiae s.s. | Preserved | 5 | 147 | 91.7 | 94.6 | 97.2 | 100 | 91.7 | 97.3 | 95.9 | ||||
| Average | Fresh | 83.2 | ||||||||||||
| Average | Preserved | 90.0 |
n -Number of mosquitoes
1Values have been presented as weighted mean.