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Table 3 Estimates of the intervention effects after a prenatal exercise programme among Caucasian pregnant women

From: The effect of an exercise program in pregnancy on vitamin D status among healthy, pregnant Norwegian women: a randomized controlled trial

Simple model Difference between the groups 95% CI p-valuea
 25(OH)D (nmol/L) 1.9 −0.9 to 4.6 0.194
 Free 25(OH)D (pmol/L) 0.53 −0.09 to 1.15 0.093
 Bioavailable 25(OH)D (nmol/L) 0.15 −0.04 to 0.34 0.123
 PTH (pmol/L) 0.15 −0.03 to 0.33 0.102
 Calcium (mmol/L) −0.001 −0.009 to 0.007 0.880
 Corrected calcium (mmol/L) 0.000 −0,007 to 0,008 0.900
 Phosphate (mmol/L) −0.001 −0.019 to 0.016 0.863
 Magnesium (mmol/L) −0.001 −0.006 to 0.004 0.700
 DBP (μmol/L) −0.08 −0.17 to 0.02 0.106
 Albumin (g/L) −0.08 −0.29 to 0.13 0.428
Full model Difference between the groups 95% CI p-valueb
 25(OH)D (nmol/L) 1.9 0.0 to 3.8 0.048
 Free 25(OH)D (pmol/L) 0.55 0.10 to 0.99 0.017
 Bioavailable 25(OH)D (nmol/L) 0.15 0.01 to 0.29 0.036
 PTH (pmol/L) 0.16 −0.02 to 0.33 0.08
 Calcium (mmol/L) −0.001 - 0.009 to 0.007 0.773
 Corrected calcium (mmol/L) 0.000 −0.008 to 0.008 0.985
 Phosphate (mmol/L) −0.003 −0.020 to 0.014 0.731
 Magnesium (mmol/L) −0.0004 −0.0051 to 0.0043 0.865
 DBP (μmol/L) −0.09 −0.18 to 0.01 0.067
 Albumin (g/L) −0.08 -0.29 to 0.13 0.447
  1. Regression analysis of covariance (ANCOVA) was used
  2. aSimple model, adjusted for baseline serum level for each substance
  3. bFull model, Simple model + study site and sampling month