Table 4 Multiadjusted linear regression analyses with vitamin K1 as dependent variables for pregnant women after bariatric surgery vs. non-surgical controls (A) and after gastric bypass vs. sleeve gastrectomy (B). Effect data are presented as unstandardized beta with 95% confidence interval (CI)

A:

Beta

95%CI

p value

Bariatric surgery

-0.258

-0.513, -0.004

0.047

Vitamin D, nmol/L

0.004

0.000, 0.008

0.033

Vitamin E, µmol/L

0.009

-0.003, 0.021

0.145

Pyridoxal 5-phosphate, nmol/L

0.011

0.005, 0.016

< 0.001

Selenium, µmol/L

0.073

-0.346, 0.491

0.732

Timing of blood sampling, gestational week

0.002

-0.022, 0.026

0.859

Pre-pregnant obesity (BMI ≥ 30 kg/m2)

-0.050

-0.250, 0.151

0.624

Multivitamin supplement

0.055

-0.120, 0.230

0.535

R² = 0.239

B:

Beta

95%CI

p value

Gastric bypass surgery

0.208

-0.012, 0.428

0.063

Vitamin D, nmol/L

0.005

0.002, 0 008

0.001

Vitamin E, µmol/L

0.006

-0.006, 0.018

0.307

Pyridoxal 5-phosphate, nmol/L

0.003

-0.003, 0.010

0.326

Selenium, µmol/L

0.081

-0.469, 0.630

0.768

Time interval since surgery, months

0.002

-0.001, 0.005

0.126

Pre-pregnant obesity (BMI ≥ 30 kg/m2)

-0.058

-0.260, 0.144

0.565

Multivitamin supplement

0.128

0.0.66, 0.322

0.190

R² = 0.478