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Table 1 Characteristics of the study population in the SCAPIS Diet sub-study

From: Carotenoids and alkylresorcinols as objective biomarkers of diet quality when assessing the validity of a web-based food record tool and a food frequency questionnaire in a middle-aged population

 

Women (n =102) n (%)

Men (n =98) n (%)

SES area

 low

42 (41)

36 (37)

 high

60 (59)

62 (63)

Smoking: current smokera

14 (14)

9 (9)

Education: university or college degree

43 (42)

37 (38)

BMI (kg/m2)

  < 24.9

50 (49)

20 (21)

 25–29.9

37 (36)

63 (64)

 30+

15 (15)

15 (15)

 

Mean ± SD

Mean ± SD

Age (y)

57.7 ± 4.5

57.7 ± 4.7

Weight [30]

72.1 ± 13.7

88.3 ± 10.5

BMI (kg/m2)

26.4 ± 4.8

27.4 ± 2.9

Total cholesterol (mmol/L)

5.98 ± 0.94

5.69 ± 1.02

LDL-cholesterol (mmol/L)

3.95 ± 0.88

3.61 ± 0.97

HDL-cholesterol (mmol/L)

1.71 ± 0.52

1.85 ± 0.62

Triglycerides (mmol/L)

1.31 ± 0.79

1.29 ± 0.98

 

Median ± IQR

Median ± IQR

Plasma carotenoids (μmol/L)

 α-carotene

0.21 ± 0.27

0.16 ± 0.16

 β-carotene

0.77 ± 0.79

0.56 ± 0.43

 β-cryptoxanthin

0.13 ± 0.14

0.11 ± 0.11

 lycopene

0.73 ± 0.42

0.71 ± 0.48

 lutein + zeaxanthin

0.42 ± 0.31

0.39 ± 0.24

Total carotenoids

2.40 ± 1.51

2.01 ± 1.14

Plasma alkylresorcinol homologues (nmol/L)

 C:17

2.3 ± 2.0

2.7 ± 3.1

 C:19

6.6 ± 7.8

7.5 ± 11.2

 C:21

8.7 ± 8.7

10.6 ± 16.0

 C:23

4.1 ± 4.0

4.3 ± 5.5

 C:25

4.4 ± 5.1

5.0 ± 6.3

Total AR homologues

21.4 ± 32.8

26.9 ± 28.4

Ratio C17:0/C21:0

0.32 ± 0.15

0.30 ± 0.16

  1. Abbreviations: AR alkylresorcinol, BMI body mass index, IQR interquartile range, SES socio economic status
  2. aMissing data; smoking (n =1)