Table 5 Multiple linear regression model of iron status (newborn SF and maternal Hb) and IPL III-V (ms) by SES

For high absolute latency wave V (> 10%)

 ID

1.214 (1.379, 0.702)

0.489

1.263 (0.481, 3.319)

0.636

1.580 (0.617, 4.049)

0.340

1.357 (0.515, 3.571)

0.536

 Cesarean delivery

1.130 (0.721, 1.771)

0.594

2.153 (0.981, 4.723)

0.056

1.393 (0.651, 2.976)

0.393

1.002 (0.433, 2.319)

0.997

 Birth weight

1.000 (1.000, 1.001)

0.331

1.001 (0.999, 1.002)

0.314

1.000 (0.998, 1.001)

0.490

1.001 (1.000, 1.003)

0.118

 Assisted reproductive technology

2.080 (0.635, 6.809)

0.226

–-

–-

1.078 (0.234, 4.972)

0.923

2.308 (0.292, 18.230)

0.428

High absolute latency wave V (> 25%)

 ID

1.204 (0.844, 1.718)

0.305

1.886 (0.994, 3.581)

0.052

1.164 (0.633, 2.141)

0.626

1.160 (0.617, 2.183)

0645

 Cesarean delivery

1.020 (0.755, 1.400)

0.899

1.561 (0.909, 2.692

0.106

1.383 (0.816, 2.342)

0.228

1.115 (0.618, 2.012)

0.717

 Birth weight

1.000 (0.999, 1.000)

0.704

1.001 (1.000, 1.002)

0.090

0.999 (0.998, 1.000)

0.018

1.000 (0.999, 1.001)

0.699

 Assisted reproductive technology

1.949 (0.904, 4.042)

0.073

2.199 (0.478, 10.111)

0.311

1.259 (0.435, 3.64)

0.671

3.216(0.723, 14.302)

0.125

High absolute latency wave V (> 50%)

 ID

1.680 (1.220, 2.313)

0.001

2.408 (1.295, 4.476)

0.005

1.293 (0.757, 2.207)

0.347

1.984 (1.117, 3.524)

0.019

 Cesarean delivery

1.164 (0.883, 1.400)

0.286

1.213 (0.754, 1.951)

0.425

1.700 (1.070, 2.700)

0.025

1.067 (0.645, 1.767)

0.799

 Birth weight

1.000 (0.999, 1.000)

0.254

1.000 (0.999, 1.001)

0.914

0.999 (0.998, 1.000)

0.047

1.000 (0.999, 1.001)

0.945

 Assisted reproductive technology

1.949 (0.904, 4.042)

0.073

2.184 (0.726, 6.566)

0.164

1.220 (0.487, 3.056)

0.672

2.358 (0.881, 6.309)

0.088

For high IPL III-V (> 10%)

 ID

1.285 (0.735, 2.247)

0.379

1.012 (0.360, 2.840)

0.982

2.717 (0.882, 8.403)

0.082

1.056 (0.442, 2.525)

0.902

 Cesarean delivery

1.402 (0.893, 2.201)

0.141

2.105 (0.943, 4.698)

0.069

1.523 (0.700, 3.317)

0.289

1.272 (0.571, 2.841)

0.557

 Birth weight

0.999 (0.998, 1.000)

0.036

0.999 (0.997, 1.001)

0.189

0.999 (0.998, 1.001)

0.280

0.999 (0.998, 1.000)

0.188

 Assisted reproductive technology

1.721 (0.810, 3.663)

0.158

1.565 (0.332, 7.407)

0.571

4.082 (1.303, 12.821)

0.016

1.438 (0.313, 6.617)

0.641

High IPL III-V (> 25%)

 ID

1.064 (0.742, 1.525)

0.737

1.350 (0.654, 2.786)

0.471

1.018 (0.556, 1.862)

0.955

1.328(0.724, 2.436)

0.359

 Cesarean delivery

1.197 (0.876, 1.637)

0.259

1.134(0.659,1.951)

0.650

1.231(0.726, 2.088)

0.441

1.208(0.687, 2.124)

0.511

 Birth weight

1.000(0.999, 1.000)

0.205

0.999(0.999, 1.000)

0.264

0.999(0.998, 1.000)

0.258

1.000(0.999, 1.001)

0.675

 Assisted reproductive technology

1.129(0.621, 2.053)

0.691

1.437 (0.397, 5.209)

0.581

1.938 (0.759, 4.950)

0.167

1.141(0.398, 3.265)

0.806

High IPL III-V (> 50%)

 ID

1.239 (0.904, 1.698)

0.183

1.202 (0.666, 2.169)

0.541

1.304(0.768, 2.216)

0.326

1.484 (0.855, 2.576)

0.161

 Cesarean delivery

1.011 (0.769, 1.328)

0.938

1.164 (0.728, 1.862)

0.525

1.121(0.708, 1.776)

0.626

1.022(0.619, 1.689)

0.932

 Birth weight

0.999 (0.999, 1.000)

0.027

0.999(0.999, 1.001)

0.264

0.999(0.998, 1.000)

0.026

1.000(0.999, 1.001)

0.523

 Assisted reproductive technology

1.337(0.782, 2.284)

0.288

1.683 (0.594, 4.770)

0.327

1.410(0.558, 3.571)

0.468

2.192(0.852, 5.640)

0.104

High SP/AP ratio (> 10%)

 ID

1.129 (0.660, 1.931)

0.658

1.123 (0.460, 2.742)

0.800

1.403 (0.578, 3.401)

0.454

2.198 (0.722, 6.711)

0.165

 Cesarean delivery

1.339 (0.842, 2.132)

0.218

1.414 (0.659, 3.030)

0.374

1.166 (0.516, 2.632)

0.712

1.376 (0.578, 3.279)

0.471

 Birth weight

1.000(0.999, 1.000)

0.282

0.999(0.998, 1.001)

0.327

0.998(0.997, 1.000)

0.038

1.001 (0.999, 1.002)

0.208

 Assisted reproductive technology

1.664 (0.586, 4.727)

0.339

2.087(0.265, 16.417)

0.484

–

–

1.406 (0.376, 5.263)

0.613

High SP/AP ratio (> 25%)

 ID

1.429 (1.007, 2.029)

0.046

1.385 (0.724, 2.650)

0.325

1.327 (0.721, 2.443)

0.363

1.747 (1.045, 3.078)

0.027

 Cesarean delivery

1.064 (0.777, 1.458)

0.699

1.178(0.689,2.012)

0.550

1.315(0.768, 2.254)

0.319

1.280(0.697, 2.353)

0.426

 Birth weight

1.000(0.999, 1.000)

0.159

0.999(0.998, 1.000)

0.067

1.000(0.999, 1.001)

0.610

1.000(0.999, 1.001)

0.700

 Assisted reproductive technology

1.449 (0.522, 3.673)

0.384

1.518 (0.418, 5.507)

0.526

2.273 (1.258, 4.886)

0.035

1.129(0.356, 3.584)

0.837

High SP/AP ratio (> 50%)

 ID

1.392 (1.013, 1.912)

0.041

1.124 (0.623, 2.026)

0.698

1.068(0.630, 1.810)

0.808

2.133 (1.220, 3.728)

0.008

 Cesarean delivery

1.068 (0.810, 1.408)

0.642

1.037 (0.649, 1.659)

0.878

0.999(0.998, 1.000)

0.049

1.214 (0.732, 2.016)

0.452

 Birth weight

1.122 (1.025, 1.229)

0.013

0.999(0.998, 1.000)

0.119

1.150(0.725, 1.824)

0.552

1.000(0.999, 1.001)

0.911

 Assisted reproductive technology

1.593(0.926, 2.739)

0.093

1.244 (0.449, 3.446)

0.674

1.700(0.683, 4.230)

0.254

1.553 (0.616, 3.912)

0.351