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Table 2 Univariate analysis of IGF1

From: Relationship between 25-hydroxyvitamin D and IGF1: a cross-sectional study of the Third National Health and Nutrition Examination Survey participants

Variable

Statistics

β (95% CI)

P value

25OHD, nmol/L

54.37 ± 20.66

0.16 (0.04, 0.29)

0.0103

Age, year

46.76 ± 18.77

−3.04 (−3.19, −2.89)

< 0.0001

BMI, kg/m2

27.23 ± 5.74

−2.21 (−2.64, −1.79)

< 0.0001

Serum calcium, mmol/L

1.24 ± 0.04

−6.29 (−61.22, 48.65)

0.8225

Gender, n (%)

   

 Male

2740 (45.32%)

Ref

 

 Female

3306 (54.68%)

−25.43 (−30.20, −20.67)

< 0.0001

Race, n (%)

   

 Non-Hispanic white

2552 (42.21%)

Ref

 

 Non-Hispanic black

1636 (27.06%)

9.62 (1.56, 17.69)

0.0194

 Mexican–American

1610 (26.63%)

−35.82 (−46.34, −25.29)

< 0.0001

Other

248 (4.10%)

−3.11 (−12.06, 5.84)

0.4963

 Exercise, n (%)

   

 Mild

3277 (54.20%)

Ref

 

 Moderate

2744 (45.39%)

2.33 (−2.28, 6.95)

0.3214

 High

19 (0.31%)

−47.33 (−106.50, 11.83)

0.1169

 NA

6 (0.10%)

−62.52 (−132.71, 7.67)

0.0809

Smoking behavior, n (%)

   

 Current

1511 (24.99%)

Ref

 

 None

3045 (50.36%)

9.50 (3.90, 15.11)

0.0009

 Past

1490 (24.64%)

6.14 (−0.26, 12.53)

0.0601

Alcohol intake, n (%)

   

 Up to one day a week

4579 (75.74%)

Ref

 

 One to three days a week

724 (11.97%)

−1.12 (−7.80, 5.56)

0.7421

 Three to six days a week

532 (8.80%)

−15.99 (−23.65, −8.33)

< 0.0001

 Daily

3 (0.05%)

−33.21 (−152.40, 85.98)

0.585

 NA

208 (3.44%)

−12.30 (−27.48, 2.88)

0.1122

Diabetes, n (%)

   

 Yes

388 (6.42%)

Ref

 

 No

5652 (93.48%)

−10.88 (−22.90, 1.14)

0.0762

 NA

6 (0.10%)

−27.75 (−85.27, 29.77)

0.3445

  1. All analyses were adjusted for age, sex, race, exercise, smoking behavior, alcohol intake, diabetes, serum calcium level, BMI, and 25OHD level
  2. Abbreviations: 25-hydroxyvitamin D (25OHD), insulin-like growth factor 1 (IGF1), body mass index (BMI), not available (NA)