Table 4 Multiple linear regression model of iron status (newborn SF and maternal Hb) and absolute latency wave V (ms) by SES

For absolute latency wave V

 < 0.001

0.171

0.021

0.169

0.234

SF

-0.340 (-0.343, -0.336)

 < 0.001

-0.359 (-0.363, -0.356)

 < 0.001

-0.419 (-0.423, -0.395)

 < 0.001

Hb (g/L)

-0.181 (-0.188, -0.173)

0.003

-0.340 (-0.130, -0.117)

0.029

-0.097 (-0.105, -0.089)

0.118

Age at delivery (years)

0.006 (-0.018, 0.020)

0.912

-0.003 (-0.021, 0.014)

0.959

0.029 (0.010, 0.048)

0.625

Gestational age (wk)

0.047 (0.043, 0.092)

0.392

-0.004 (-0.047, 0.039)

0.942

-0.045 (-0.093, 0.002)

0.427

Pre-pregnancy BMI (kg/m²)

0.059 (-0.005, 0.124)

0.341

0.014 (-0.050, 0.078)

0.804

0.015 (-0.048, 0.079)

0.798

LGFBG (mmol/L) ^a

0.026 (-0.108, 0.165)

0.630

0.040 (-0.083, 0.184)

0.459

-0.043 ( -0.197, 0.094)

0.444

Extra-sport activities during pregnancy

0.030 (-0.160, 0.219)

0.594

-0.004 (-0.176, 0.169)

0.941

-0.001 ( -0.199, 0.197)

0.985

Smoking before pregnancy

0.079 (0.317, 2.145)

0.160

0.069 (-0.673, 0.912)

0.203

0.066 (-1.447, 1.578)

0.247

Passive smoking during pregnancy

-0.090 (-0.446, -0.041)

0.106

-0.009 (-0.219, 0.201)

0.872

-0.001 (-0.234, 0.233)

0.996

Drinking before pregnancy

0.025 (-0.306, 0.355)

0.657

-0.031 (-0.317, 0.255)

0.563

0.022 (-0.270, 0.313)

0.707

Mixed diet

0.011(-0.101, 0.123)

0.847

-0.090 (-0.193, 0.012)

0.092

0.088 ( -0.017, 0.226)

0.119

Cesarean delivery

0.062(-0.043, 0.339)

0.279

-0.120 (-0.298, -0.032)

0.038

0.013 (-0.172, 0.237)

0.828

Assisted reproductive technology

0.083(-0.223, 0.478)

0.128

-0.032 (-0.362, 0.298)

0.556

0.071(0.016, 0.694)

0.218

Hypertension during pregnancy

0.023 (-0.346, 0.392)

0.681

0.195 (-0.111, 0.985)

0.386

-0.077 ( -0.837, 0.683)

0.175

Birth weight

0.039 (0.037, 0.044)

0.506

-0.066 (-0.069,-0.065)

0.235

0.128 (0.127, 0.130)

0.027

Apgar score at 5 min

-0.040 (-0.724, 0.644)

0.462

-0.028 ( -0.465, 0.402)

0.622

-0.096 (-1.566, 1.394)

0.090

Female

0.028 (-0.117, 0.253)

0.610

0.090 (-0.158,0.176)

0.091

0.007 (-0.175, 0.208)

0.905