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Table 3 Association between socio-economic, personal and lifestyle factors and frequent consumption of organic food.

From: Characteristics associated with organic food consumption during pregnancy; data from a large cohort of pregnant women in Norway

  

Unadjusted model

 

Adjusted model§

  

SumIndex >6

P-value*

RD*100

(95% CI)

 

Total n

63,561

n

%

   

Total

  

9.1

   

Prevalence at ref. category

    

7.8

 

Age

   

<0.001

  

   <20

854

239

28

 

15.6

(12.6,18.7)

   20-24

7745

996

12.9

 

3.0

(2.1, 3.8)

   25-29

22689

1820

8.0

 

-0.5

(0.9, 0.0)

   30-34

22925

1866

8.1

 

0

 

   35-39

8306

715

8.6

 

0.3

(-0.4, 0.9)

   40 +

1042

118

11.3

 

2.6

(0.7, 4.5)

Prepregnant BMI

   

<0.001

  

   <18.5

1825

226

12.4

 

1.8

(0.4, 3.3)

   18.5-24.9

40519

3795

9.4

 

0

 

   25-29.9

13547

1102

8.1

 

-0.9

(-1.4, -0.4)

   30-34.9

4355

314

7.2

 

-1.8

(-2.5, -1.1)

   35+

1645

128

7.8

 

-1.5

(-2.7, -0.3)

   Missing

1670

189

11.3

 

1 .0

(-0.5, 2.5)

Dietary habits

   

<0.001

  

   Meat/fish

63449

5716

9.0

 

0

 

   Vegetarian

112

38

33.9

 

23.1

(14.4, 31.8)

Alcohol in pregnancy

   

0.59

  

   No

56182

5072

9.0

 

0

 

   Yes

7379

682

9.2

 

0.7

(0.0, 1.4)

Smoking in pregnancy

   

<0.001

  

   No smoking

58241

5116

8.8

 

0

 

   Occasionally

1812

218

12.0

 

2.0

(0.6, 3.4)

   Daily

3508

420

12.0

 

1.5

(0.5, 2.6)

Exercise in pregnancy

   

<0.001

  

   No

9166

756

8.2

 

0

 

   Less than weekly

12317

888

7.2

 

-0.5

(-1.1, 0.2)

   1-2 times weekly

18734

1538

8.2

 

0.4

(-0.3, 1.0)

   3+ times weekly

17992

1956

10.9

 

2.5

(1.8, 3.2)

   Missing

5352

616

11.5

 

2.6

(1.7, 3.6)

Education

   

<0.001

  

   <10 y-12 y

20398

2252

11.0

 

0

 

   13-16 y

26462

1822

6.9

 

-2.5

(-3.0, -1.9)

   17+

15319

1534

10.0

 

-0.1

(-0.7, 0.6)

   Missing

1382

146

10.6

 

-0.2

(-1.8, 1.4)

Student, participant

   

<0.001

  

   No

57279

4928

8.6

 

0

 

   Yes

6282

826

13.1

 

1.9

(1.1, 2.8)

Student, participant's partner

   

<0.001

  

   No

60296

5342

8.9

 

0

 

   Yes

3265

412

12.6

 

1.7

(0.6, 2.9)

Household income

   

<0.001

  

   Low (both <NOK 300 000)

17324

1861

10.7

 

0

 

   Medium (one ≥NOK 300 000)

24357

1947

8.0

 

-1.6

(-2.1, -1.0)

   High (both ≥NOK 300 000)

16561

1268

7.7

 

-2.3

(-2.9, -1.6)

   Missing

5319

677

12.7

 

1 .0

(-0.0, 1.9)

Year of participation

   

<0.001

  

   2002

8768

679

7.7

 

0

 

   2003

10834

855

7.9

 

0.3

(-0.4, 1.0)

   2004

10717

834

7.8

 

0.4

(-0.3, 1.1)

   2005

12369

1135

9.2

 

1.5

(0.8, 2.2)

   2006

11030

1097

9.9

 

2.3

(1.6, 3.1)

   2007

8562

993

11.6

 

4.1

(3.3, 5.0)

   Missing

1281

161

12.6

 

3.6

(1.7, 5.4)

Living area

   

<0.001

  

   Rural

31070

2675

8.6

 

0

 

   Urban

32491

3079

9.5

 

0.6

(0.1, 1.0)

  1. § Linear binomial model. Prevalence at reference category shows the constant term which equals expected use of organic food with medium or high frequency (Sum index >6) when all covariates are zero.
  2. The table shows risk differences × 100 (with 95% confidence interval) for frequent consumption of organic food. Zero values are the reference categories.
  3. *P for trend across characteristic categories (Chi square).
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