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. 2022 Aug 23;51(3):346–355. doi: 10.1515/jpm-2021-0376

Table 1:

Baseline characteristics of the study population (n=3,251).

Characteristics Regular care (n=2,477)a Calcium advice care (n=774)a
Age, years (mean ± SD) 30.2 ± 3.9 30.7 ± 4.0
Body Mass index before pregnancy, kg/m2 (mean ± SD) 24.2 ± 4.3 24.5 ± 4.4
Ethnicity
  • –

    Caucasian, n (%)

 2,401 (96.9) 757 (97.8)
  • –

    Other, n (%)

 76 (3.1) 17 (2.2)
Parity
  • –

    Nulliparous, n (%)

 1,265 (51.1) 384 (49.6)
  • –

    Multiparous, n (%)

 1,212 (48.9) 390 (50.4)
Level of education
  • –

    Primary, n (%)

 9 (0.4) 4 (0.5)
  • –

    Secondary vocational, n (%)

 143 (5.8) 37 (4.8)
  • –

    Secondary general (MBO, post-secondary vocational education), n (%)

 973 (39.3) 266 (34.4)
  • –

    Tertiary (University of applied sciences), n (%)

 944 (38.1) 325 (42.0)
  • –

    Tertiary (University), n (%)

 408 (16.5) 142 (18.4)

SD, standard deviation. aPercentages do not always add up to 100% due to rounding.