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Table 3 Before and after values of 25-OHD and physical tests at baseline and 10 months (Time II) by target and reference groups (participants) and categories of 25-OHD concentrations (nmol/L) groups based on 25-OHD levels at baseline and compliers or non-compliers of supplement intake. Statistical significans with Wilcoxon

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
N 46 25
  Compliers Non-compliers Compliers
n (%) 38 (82.6%) 8 (17.4%) 23 (92%)
25(OH)D categorya <10 10–24 25–50 <10 10–24 10–24 25–50
n 13 21 4 4 4 5 18
25(OH)D, mean (Std)
 Baseline 9.0 (0.0) 16.1 (5.0) 39.0 (15.1) 9.0 (0.0) 19.8 (3.1) 22.5 (1.6) 42.0 (6.7)
 10 m 50.5 (36.1) 57.9 (39.0) 60.3 (8.0) 15.0 (4.1) 22.6 (10.9) 66.3 (29.0) 66.6 (28.2)
 p 0.001 <0.001 0.068 0.102 0.715 0.043 0.001
Physical performance
 Grip (N), mean (Std)        
 Baseline 118 (64) 162 (36) 193 (103) 166 (37) 171 (23) 242 (51) 262 (76)
 10 m 148 (65) 208 (46) 219 (54) 168 (37) 201 (43) 267 (34) 310 (59)
 p 0.039 <0.001 0.465 0.593 0.144 0.080 0.010
Inability to: Squat, n(%)
 Baseline 11 (84.6) 13 (61.9) 3 (75.0) 4 (100) 4 (100) 0 (0.0) 0 (0.0)
 10 m 0 (0.0) 4 (19.0) 1 (25.0) 2 (50.0) 2 (50.0) 1 (20.0) 0 (0.0)
 p 0.001 0.012 0.500 0.500 0.500 1.000  
Stand on one leg, n (%)        
 Baseline 3 (23.1) 5 (23.8) 0 (0.0) 2 (66.7) 1 (25.0) 0 (0.0) 1 (5.6)
 10 m 3 (23.1) 3 (14.3) 2 (50.0) 2 (66.7) 0 (0.0) 0 (0.0) 0 (0.0)
 p 1.000 0.688 0.500 1.000 1.000   1.000
Keep hip up, n (%)       
 Base line 4 (30.8) 4 (19.0) 0 (0.0) 1 (25.0) 1 (25.0) 0 (0.0) 1 (5.6)
 10 m 0 (0.0) 0 (0.0) 0 (0.0) 1 (25.0) 0 (0.0) 0 (0.0) 0 (0.0)
 p 0.125 0.125   1.000 1.000   1.000
  1. Note: aCategorized 25-OHD values due to unmeasurable values and treatment strategies at baseline
  2. Bold data are significant