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Table 4 Factors associated with low vitamin D status

From: Vitamin D deficiency status and its related risk factors during early pregnancy: a cross-sectional study of pregnant Minangkabau women, Indonesia

Variables

 

OR (95% CI)

P value

Age (year)

 

1.020

0.862–1.208

0.814

Age group

< 20

1.00

  

21–25

0.777

0.060–10,143

0.848

26–30

0.172

0.009–3.279

0.242

> 30

0.189

0.040–111.259

0.360

Education levels

Primary

1.00

  

Secondary

0.568

0.182–1.775

0.330

Tertiary

0.429

0.100–1.829

0.253

Working status

Working

1.00

 

0.030

Not Working

0.029

0.001–0.708

 

Household income/month (IDR)

 

1.00

1.00–1.00

0.681

Urban status

Urban

1.00

 

0.882

Rural

1.109

0.285–4.312

 

Geographical status

Coastal

1.00

  

Mountainous

0.424

0.121–1.486

0.180

Gestational age (week)

 

0.945

0.771–1.157

0.583

Parity status

Multiparous Nulliparous

1.00

7.634

1.550–37.608

0.012

Bodyweight of 1st trimester (kg)

 

0.975

0.826–1.151

0.764

Upper arm circumference (cm)

 

1.118

0.882–1.416

0.358

Pre-pregnancy bodyweight (kg)

 

1.007

0.840–1.207

0.939

Pre-pregnancy BMI (kg/m2)

 

0.920

0.644–1.315

0.647

Pre-pregnancy BMI status

Underweight

1.00

  

Normal

0.664

0.118–3.731

0.642

Overweight

0.101

0.003–2.977

0.184

Pre-obese

0.990

0.038–26.028

0.995

Obese

2.423

0.025–232.393

0.704

Blood pressure (mmHg)

Systolic

1.00

0.947–1.056

0.994

Diastolic

0.971

0.882–1.070

0.552

Sunscreen application

No

1.00

 

0.810

Yes

1.147

0.375–3/507

 

Type occupation

Indoor

1.00

 

0.081

outdoor

17.713

0.704–445.491

 

Dressing style

< 27% uncovered

1.00

0.267–5.552

0.799

≥27% uncovered

1.218

  

Physical activity level

Low-moderate

1.00

 

0.731

High

0.815

0.255–2.610

 

Outdoor activity

 

0986

0.972–1.001

0.070

The length of outdoor activity

≥60 min/week

1.00

 

0.007

< 60 min/week

9.659

1.883–49.550

 

Vitamin D intake (mcg/d)

 

0.988

0.885–1.103

0.835

Calcium intake (mg/d)

 

1.00

0.999–1.000

0.269

Vitamin D intake status

Inadequate

1.00

0.222–188.964

0.277

Adequate

6.483

  

Calcium intake status

Inadequate

1.00

0.086–9.904

0.946

Adequate

0.921

  

Consuming supplement before pregnancy

Yes

1.00

1.081–18.563

0.039

No

4.49

  

Consuming supplement during 1st trimester

No

1.00

0.172–1.443

0.199

Yes

0.499

  

Consuming vitamin D and calcium supplement

No

1.00

0.259–4.289

0.940

Yes

1.056

  
  1. OR odds ratio, CI confidence interval, Ref reference category
  2. Bold number is indicated P < 0.05
  3. Serum 25(OH)D < 20 ng/mL (n = 192) and serum ≥20 ng/mL (n = 40)
  4. 1.00 as a reference group