Table 6 Multiple linear regression model of iron status (newborn SF and maternal Hb) and SP/AP ratio (wave V) by SES

For SP/AP ratio (wave V)

 < 0.001

0.309

0.031

0.207

 < 0.001

0.261

SF

-0.532 (-0.548, -0.516)

 < 0.001

-0.442 (-0.459, -0.425)

 < 0.001

-0.482 (-0.523, -0.461)

 < 0.001

Hb (g/L)

-0.093 (-0.125, -0.060)

0.086

-0.052 (-0.085, -0.018)

0.352

-0.094 (-0.140, 0.052)

0.126

Age at delivery (years)

0.037 (-0.046, 0.119)

0.479

-0.061 (-0.135, 0.004)

0.282

0.013 (-0.096, 0.122)

0.829

Gestational age (wk)

0.015 (-0.180, 0.210)

0.763

0.007 (-0.207, 0.220)

0.900

-0.099 (-0.373, 0.175)

0.075

Pre-pregnancy BMI (kg/m²)

0.024 (-0.293, 0.342)

0.664

-0.050 (-0.369, 0.268)

0.360

-0.149 (-0.501, 0.203)

0.008

LGFBG (mmol/L) ^*

-0.013 (-0.610, 0.584)

0.797

-0.034 (-0.695, 0.627)

0.515

0.095 ( -0.890, 0.979)

0.087

Extra-sport activities during pregnancy

0.009 (-0.829, 0.853)

0.855

-0.144 (-1.986, -0.307)

0.007

-0.009 ( -1.147, 1.129)

0.879

Smoking before pregnancy

-0.102 (-4.135, 3.931)

0.046

-0.004 (-0.3.184, 4.175)

0.943

0.027 (-8.671, 8.725)

0.627

Passive smoking during pregnancy

-0.329 (-1.644, 0.194)

0.414

0.074(-0.966, 1.114)

0.156

-0.105 (-1.445, 1.236)

0.068

Drinking before pregnancy

0.123 (-1.335, 1.581)

0.016

-0.030 (-1.446, 1.386)

0.560

-0.015 (-1.692, 1.663)

0.799

Mixed diet

0.029 (-0.465, 0.522)

0.557

-0.085 (-0.593, 0.423)

0.102

0.040 ( -0.657, 0.737)

0.469

Cesarean delivery

-0.038 (-0.886, 0.809)

0.473

0.083 (-0.800, 0.965)

0.144

0.110 (-0.875, 1.195)

0.048

Assisted reproductive technology

0.045(-1.695, 1.785)

0.370

0.019 (-1.617, 1.655)

0.717

-0.012 (-1.961, 1.937)

0.833

Hypertension during pregnancy

0.064 (-1.537, 1.664)

0.202

-0.112 (-2.776, 2.551)

0.031

0.030 ( -5.341, 4.401)

0.595

Birth weight

-0.056 (-0.058, -0.054)

0.301

-0.048(-0.049, -0.046)

0.374

0.039 (0.037, 0.040)

0.486

Apgar score at 5 min

-0.021 (-2.938, 2.996)

0.668

-0.020 (-2.679, 2.639)

0.712

0.039 (-8.530, 8.607)

0.476

Female

0.066 (-0.750, 0.881)

0.196

0.134 (-0.687,0.954)

0.010

0.003 (-1.097, 1.303)

0.956