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Table 2 Factors associated with 25-hydroxyvitamin D level, adjusted linear regression analysis

From: Assessment of vitamin D among male adolescents and young adults hospitalized with eating disorders

Independent variables

Unadjusted

Adjusted

B (95% CI)a

P

B (95% CI)b

p

Male sex

−2.51 (−5.15, 0.13)

0.063

–

–

Age, years

0.01 (−0.34, 0.36)

0.973

–

–

White (vs. non-White)

7.99 (6.09, 9.88)

 < 0.001

7.63 (5.75, 9.51)

 < 0.001

Anorexia nervosa (vs. non-anorexia nervosa)

1.91 (−0.07, −3.90)

0.059

–

–

Percent median BMI

−7.22 (−14.21, −0.23)

0.043

−4.02 (−10.58, 2.53)

0.228

Summer (vs. winter)

2.01 (0.04, 3.97)

0.045

2.24 (0.41, 4.07)

0.017

Calcium/vitamin D supplementation prior to admission

5.10 (1.54, 8.67)

0.005

3.95 (0.42, 7.47)

0.028

Multivitamin supplementation prior to admission

4.84 (1.77, 7.91)

0.002

2.96 (−0.08, 6.01)

0.057

Calcium, serum/plasma (mg/dL)

3.16 (0.99, 5.33)

0.004

2.19 (0.14, 4.23)

0.036

Phosphorous, serum/plasma (mg/dL)

−0.15 (−0.66, 0.37)

0.574

–

–

  1. Boldface indicates p < 0.05
  2. a Unadjusted represents outputs from simple linear regression analyses with the listed independent variable and 25-hydroxyvitamin D level as the dependent variable
  3. b Independent variables significantly associated with 25-hydroxyvitamin D level in unadjusted analyses were included in a single multivariable model