Table 2 Frequency and multivariable odds ratios (OR) with 95% confidence intervals (CI) for correlates of self-test use in general for women and men

Age (years)

- ≤ 27

1901

14.3

Reference

736

9.1

Reference

- 28 – 41

1881

18.4

1.12 (0.93–1.35)

822

11.8

1.04 (0.74–1.48)

- ≥ 42

1333

21.2

1.20 (0.97–1.49)

1246

16.1

1.22 (0.86–1.73)

Educational level

- low

940

15.4

Reference

421

12.6

Reference

- intermediate

2124

18.5

1.43 (1.15–1.78)**

979

12.5

1.07 (0.75–1.54)

- high

2051

17.6

1.38 (1.09–1.73)**

1404

13.5

1.19 (0.84–1.68)

BMI (weight/height²)

-< 25

3109

15.3

Reference

1411

10.4

Reference

- 25–29.9

1257

20.0

1.28 (1.07–1.54)**

1031

13.3

1.12 (0.86–1.47)

- ≥ 30

721

23.2

1.51 (1.21–1.88)***

359

22.0

1.77 (1.26–2.49)**

Smoking

- no

1382

17.2

Reference

2120

12.8

Reference

- yes

3732

18.5

1.09 (0.92–1.29)

684

13.5

1.02 (0.78–1.34)

Physical activity (30 minutes/day)

- 0 to 4 days a week

2422

16.9

Reference

1462

14.5

Reference

- 5 to 7 days a week

2693

18.2

1.13 (0.97–1.31)

1342

11.3

0.78 (0.62–0.99)*

Vegetables (200 grams a day)

- 0 to 4 days a week

2249

16.2

Reference

1244

12.6

Reference

- 5 to 7 days a week

2866

18.7

1.03 (0.88–1.21)

1560

13.3

1.02 (0.80–1.32)

Fruits (2 pieces a day)

- 0 to 4 days a week

3000

16.3

Reference

1838

11.6

Reference

- 5 to 7 days a week

2115

19.4

1.14 (0.97–1.34)

966

15.5

1.13 (0.88–1.46)

Fat intake (in terms of type/amount)

- 0 to 4 days a week

1930

14.5

Reference

1381

10.6

Reference

- 5 to 7 days a week

3185

19.5

1.22 (1.03–1.44)*

1423

15.3

1.32 (1.03–1.69)*

Alcohol (glasses/week)

- none

2327

17.4

Reference

629

14.5

Reference

- 1 to 14; 1 to 21^c

2529

17.2

1.05 (0.89–1.23)

1935

12.7

0.93 (0.70–1.22)

-> 14; > 21^c

259

22.4

1.37 (0.99–1.91)

240

11.3

0.78 (0.48–1.27)

Dietary supplements

- no

2101

13.3

Reference

1554

9.5

Reference

- yes

3014

20.6

1.41 (1.19–1.67)***

1250

17.4

1.75 (1.38-–2.22)***

Homeopathic medicine

- no

3717

15.2

Reference

2369

11.3

Reference

- yes

1398

23.8

1.48 (1.25–1.74)***

435

22.3

1.75 (1.33–2.31)***

Blood donor

- no

4083

16.7

Reference

2101

12.1

Reference

- yes

1032

21.2

1.23 (1.03–1.47)*

703

15.6

1.16 (0.90–1.51)

Chronic illness or disability

- no

3734

15.4

Reference

2121

11.0

Reference

- yes

1381

23.5

1.34 (1.12–1.60)**

683

19.2

1.33 (1.02–1.75)*

Perceived health

- good

3739

15.8

Reference

2073

10.6

Reference

- moderate/poor

1376

22.5

1.25 (1.04–1.49)*

731

19.7

1.53 (1.17–2.00)**