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Table 2 Predictors of vitamin D insufficiency in patients with dementia with Vitamin D supplementation: binary logistic regression analyses

From: Efficacy of daily 800 IU vitamin D supplementation in reaching vitamin D sufficiency in nursing home residents: cross-sectional patient file study

  25(OH)D1 < 50 nmol/L 25(OH)D ≥50 nmol/L P-value OR 95% CI
N 16 55    
Gender, % (n)    0.9   
Male 25 (12) 23 (13)    
Female 75 (4) 76 (42)    
Age in years, mean (SD) 83 (SD 8) 83 (SD 7) 0.9   
Subjects with sunlight exposure >1x/week, % (n) 25 (4) 44 (24) 0.1   
Drops/capsules, % (n)    <0.0001 35.3 7.7-160.9
- drop users 81 (13) 11 (6)
- capsule users 19 (3) 89 (49)
No. of medications, % (n)    0.8   
<5 75 (12) 72 (40)
>5 25 (4) 27 (15)
FAC2, % (n)    0.3   
0 25 (4) 42 (23)
1 6 (1) 13 (7)
2 19 (3) 9 (5)
3 31 (5) 9 (5)
4 13 (2) 24 (13)
5 6 (1) 4 (2)
BMI3, (n)    0.3   
<20 underweight 56 (9) 55 (30)
20-25 healthy weight 25 (4) 36 (20)
>25 overweight 19 (3) 9 (5)
MDRD4, % (n)    0.6   
<60 37 (6) 29 (16)
>60 62 (10) 71 (39)
Comorbidity5, % (n)    0.02 0.2 0.07-0.8
≤ 2 diseases 50 (8) 80 (44)
>2 diseases 50 (8) 20 (11)  
  1. 125(OH)D −25-hydroxyvitamin D.
  2. 2FAC - Functional Ambulation Classification.
  3. 3BMI - Body Mass Index.
  4. 4MDRD - Modification of Diet in Renal Disease.
  5. 5Chronic diseases from seven majors: chronic obstructive pulmonary disease, cardiac disease, peripheral arterial disease, stroke, diabetes mellitus, rheumatoid arthritis/osteoarthritis and cancer.