| Step | Parameter | Both genders pooled | Male | Female |
---|---|---|---|---|---|
Transformed AC | Fractional polynomial transformation of GA | p 1 | -2 | -2 | -2 |
p 2 | 1 | 1 | 1 | ||
a 1 | -168.4982 | -164.9962 | -172.1061 | ||
a 2 | 0.0297 | 0.0297 | 0.0298 | ||
Mixed-effects model regressing log(AC) on f(GA) = GA− 2 + (a2/a1)GA | b 0 | 4.8170 | 4.8201 | 4.8114 | |
b 1 | -168.4671 | -165.0468 | -172.0514 | ||
var(β0i) | 0.0012 | 0.0009 | 0.0012 | ||
var(β1i) | 18.5802 | 32.9797 | 0.0999 | ||
cov(β0i, β1i) | 0.0490 | 0.0747 | -0.0108 | ||
var(e ij ) | 0.0008 | 0.0008 | 0.0009 | ||
Transformed EFW | Fractional polynomial transformation of GA | p 1 | 0.5 | 0.5 | 0.5 |
p 2 | 2 | 2 | 2 | ||
a 1 | -0.1176268 | -0.1166731 | -0.1186321 | ||
a 2 | 0.0796 × 10-3 | 0.0783 × 10-3 | 0.0809 × 10-3 | ||
Mixed-effects model regressing EFW-0.1 on f(GA) = GA0.5 + (a2/a1)GA2 | b 0 | 1.0573 | 1.0528 | 1.0623 | |
b 1 | -0.1176 | -0.1167 | -0.1186 | ||
var(β0i) | 7.370 × 10-6 | 3.004 × 10-4 | 16.70 × 10-6 | ||
var(β1i) | 1.668 × 10-4 | 14.2 × 10-6 | 7.74 × 10-12 | ||
cov(β0i, β1i) | -0.335 × 10-4 | -0.64 × 10-4 | -1.12 × 10-8 | ||
var(e ij ) | 6.290 × 10-6 | 5.43 × 10-6 | 7.13 × 10-6 |