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Table 1 Baseline characteristics for entire sample and participants in the target and reference groups. Values are means with standard deviation (Std), number (n) and frequencies (%)

From: Long-term adherence and effects on grip strength and upper leg performance of prescribed supplemental vitamin D in pregnant and recently pregnant women of Somali and Swedish birth with 25-hydroxyvitamin D deficiency: a before-and-after treatment study

  Target group Reference group
All Participants All Participants
Number, n (%) 51 46 (90.2) 40 25 (62.5)
Age, years 28.3 (6.4) 28.0 (6.5) 30.4 (5.4) 30.6 (5.7)
Parity, n (%) 3.4 (2.7) 3.1 (2.5) 1.3 (1.1) 1.4 (1.1)
Education, years 3.4 (3.4) 3.5 (3.5) 13.9 (2.5) 14.3 (2.2)
Height, cm 161.5 (5.2) 161.4 (5.1) 167.0 (6.3) 167.2 (6.1)
25-OHD nmol/L 15.4 (7.8)a 15.8 (9.7)a 37.8 (9.5) 38.8 (10.3)
s-Ca, mmol/L 2.27 (0.12) 2.27 (0.12) 2.31 (0.07) 2.31 (0.06)
fP-PTH pmol/L 12.7 (11.0) 13.0 (11.5) 4.71 (2.49) 4.87 (2.90)
s-ALP, ukat/L 2.00 (1.40) 2.02 (1.45) 1.58 (0.77) 1.56 (0.76)
  1. Reference ranges: fP-PTH, 1.1–6.9 pmol/L; s-albumin corrected calcium, 2.15–2.50 mmol/L; s-ALP, 0.60–1.80 ukat/L
  2. a25-OHD values <10 nmol/L (unmeasurable) replaced with 9 for 17 women (34%) in the entire sample and n = 17 (37%) among target group participants
  3. Note: NS. drop-outs (n = 5 TG; n = 15 RG) vs. participants (Mann–Whitney U test)