Table 2.
Predicted filament diameter values are compared against experimental values for corresponding material concentrations of alginate and gelatin. Actual values represent the mean ± standard deviation for all samples (n = number of samples) measured from at least three batches of Alg/Gel bioink.
| Prediction Model | Material Concentration (%w/v) | Predicted Filament Diameter (μm) | Actual Value (μm) | Error (%) |
|---|---|---|---|---|
| Random forest regression | 3/4 Alg/Gel | 1037.3 μm (prediction pressure = 25 kPa) |
927.6 ± 106.0 μm (n = 8) | 10.6 |
| 3/4 Alg/Gel | 752.2 μm (predictive pressure = 103.3 kPa) |
927.6 ± 106.0 μm (n = 8) | 23.3 | |
| 3/7 Alg/Gel | 857.3 μm (predictive pressure = 75 kPa) |
707.2 ± 146.1 μm (n = 11) | 17.5 | |
| 3/7 Alg/Gel | 752.2 μm (prediction pressure = 103.3 kPa) |
707.2 ± 146.1 μm (n = 11) | 5.98 | |
| Linear regression | 3/4 Alg/Gel | 1275.8 μm (prediction pressure = 25 kPa) |
927.6 ± 106.0 μm (n = 8) | 27.3 |
| 3/4 Alg/Gel | 1149.0 μm (prediction pressure = 103.3 kPa) |
927.6 ± 106.0 μm (n = 8) | 19.3 | |
| 3/7 Alg/Gel | 1187.1 μm (prediction pressure = 75 kPa) |
707.2 ± 146.1 μm (n = 11) | 40.4 | |
| 3/7 Alg/Gel | 1141.3 μm (prediction pressure = 103.3 kPa) |
707.2 ± 146.1 μm (n = 11) | 38.0 | |
| Intrastudy linear regression | 3/4 Alg/Gel | 212.3 μm (prediction pressure = 25 kPa) |
927.6 ± 106.0 μm (n = 8) | 337 |
| 3/7 Alg/Gel | 200.0 μm (prediction pressure = 75 kPa) |
707.2 ± 146.1 μm (n = 11) | 254 |