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Table 1 Demographic characteristics of NHANES 2013-18 adults aged ≥ 20 by depression

From: The association of vitamin D deficiency, age and depression in US adults: a cross-sectional analysis

Characteristics, n%

Sample Capacity

Depression

Non-depression

Test statistics

P

N = 15,156

n = 3883

n = 11,273

Gender

      

124.424a

< 0.001***

Male

7301

(48.17)

1571

(40.46)

5730

(50.83)

  

Female

7855

(51.83)

2312

(59.54)

5543

(49.17)

  

Age Group

      

-9.827b

< 0.001***

20–39

5031

(33.19)

1189

(30.62)

3842

(34.08)

  

40–59

4979

(32.85)

1328

(34.20)

3651

(32.39)

  

≥ 60

5146

(33.95)

1366

(35.18)

3780

(33.53)

  

Race

      

-5.201b

< 0.001***

Hispanic

3642

(24.03)

973

(25.06)

2669

(23.68)

  

Non-Hispanic White

5814

(38.36)

1588

(40.90)

4226

(37.49)

  

Non-Hispanic Black

3215

(21.21)

832

(21.43)

2383

(21.14)

  

Non-Hispanic Asian

1894

(12.50)

311

(8.01)

1583

(14.04)

  

Other

591

(3.90)

179

(4.61)

412

(3.65)

  

Education

      

-11.479b

< 0.001***

Below high school

3154

(20.81)

1021

(26.29)

2133

(18.92)

  

High school

3458

(22.82)

958

(24.67)

2500

(22.18)

  

Post high school

8544

(56.37)

1904

(49.03)

6640

(58.90)

  

Marital Statues

      

184.221a

< 0.001***

Cohabitation

9010

(59.45)

1973

(50.81)

7037

(62.42)

  

Married living alone

3381

(22.31)

1125

(28.97)

2256

(20.01)

  

Not married

2765

(18.14)

785

(20.22)

1980

(17.56)

  

Income to Poverty

      

238.087a

< 0.001***

Impoverished

4825

(31.84)

1623

(41.80)

3202

(28.40)

  

Moderate income

10,331

(68.16)

2260

(58.20)

8071

(71.60)

  

BMI

      

-9.103b

< 0.001***

Underweight

479

(3.16)

132

(3.40)

347

(3.08)

  

Normal weight

3932

(25.94)

863

(22.23)

3069

(27.22)

  

Overweight

4744

(31.30)

1080

(27.81)

3664

(32.50)

  

Obese

6001

(39.59)

1808

(46.56)

4193

(37.20)

  

Physical Activity

      

-1.224b

0.221

Inactive

8794

(58.02)

2217

(57.10)

6577

(58.34)

  

Insufficiently active

2962

(19.54)

784

(20.19)

2178

(19.32)

  

Sufficiently active

3400

(22.43)

882

(22.71)

2518

(22.34)

  

Suicidal Attempt

      

1354.514a

< 0.001***

Yes

559

(3.69)

516

(13.29)

43

(0.38)

  

No

14,597

(96.31)

3367

(86.71)

11,230

(99.62)

  

Serum Vitamin D

      

14.744a

< 0.001***

< 30nmol/L

1185

(7.82)

359

(9.25)

826

(7.33)

  

≥ 30nmol/L

13,971

(92.18)

3524

(90.75)

10,447

(92.67)

  
  1. a chi-square test, b Kruskal-Wallis-test, *P < 0.05, **P < 0.01, ***P < 0.001, same as below; Depression: PHQ-9 score ≥ 5, non-Depression: PHQ-9 score < 5; BMI: Body Mass Index; Vitamin D Deficiency: Serum Vitamin D < 30nmol/L