Table 1.
Explanation of variables in the fitting model
| Variable | Explanation | Value |
|---|---|---|
| L | Latency (ms) | |
| S | Stimulation level | 90 dB |
| P | Postconceptional age (weeks) | |
| L I (90) | I latency 90 dB (adults) | 1.60 ms (SD 0.13 ms) |
| I I_III (∞) | I–III interval (90 dB adults) | 2.17 ms (SD 0.15 ms) |
| I I_V (∞) | I–V interval (90 dB adults) | 4.04 ms (SD 0.18 ms) |
| τ 1 | Time constant “nerve growth” | 21.7 weeks (SE 2.1 weeks) |
| τ 2 | Time constant “nerve maturation” | 35.4 weeks (SE 1.8 weeks) |
Table 1 shows the explanation and the values of the variables used in our fitting model. The time constants of τ 1 and τ 2 can predict maturation from 38 weeks onwards. To use these time constants as a measure of postnatal maturation, 38 weeks should be added