Table 3.

Maturation‐decline function parameters from this review compared with published values from similar studies

Model	θ1	PMA50 (weeks)
Germovsek et al. 21	4.19 (17)	45.1 (7)
Rhodin et al. 159	3.40	47.7
Pooled from this review	3.45 (77)	49.7 (32)

$$\left(\frac{{\mathit{PMA}}^{{\theta }_1}}{{\mathit{PMA}}^{{\theta }_1}+{\mathit{PMA}}_{50}^{{\theta }_1}}\right)$$

PMA is the postmenstrual age in weeks and PMA₅₀ is the PMA age at which 50% of adult function is achieved. θ₁is the Hill parameter. PMA₅₀ and θ₁ are estimated in the model fitting process.