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Table 4 Compare between correlation and bootstrapping a correlation of nutrient intake from semi-FFQ and biochemical results

From: Validation of a Thai semiquantitative food frequency questionnaire (semi-FFQ) for people at risk of metabolic syndrome

Food group

Variables

Correlation

Bootstrapping a correlation

Nutrient

Biochemical results

Correlation coefficient

P value

Correlation coefficient

95% CI

Bias factor

P value

Fruit

Sugar (g)

FBG

0.265**

0.01

0.221**

0.15, 0.54

0

0.00

HbA1c

0.18

0.09

0.18

− 0.02, 0.36

0

0.09

Beverage

Sugar (g)

FBG

− 0.04

0.74

− 0.14

− 0.42, 0.15

0

0.52

HbA1c

− 0.15

0.14

− 0.15

− 0.36, 0.05

0

0.14

Snack

Sugar (g)

FBG

− 0.08

0.46

− 0.11

− 0.29, 0.19

0

0.46

HbA1c

− 0.05

0.63

− 0.05

− 0.26, 0.18

0

0.63

Snack

Fat (g)

TG

0.18

0.09

0.13

− 0.23, 0.45

0

0.21

CHOL

− 0.08

0.45

− 0.09

− 0.22, 0.31

0

0.37

HDL-C

− 0.15

0.17

− 0.14

− 0.17, 0.10

0

0.19

LDL-C

0.09

0.31

0.15

− 0.23, 0.34

0

0.18

Snack

Sodium (mg)

SBP

0.272**

0.01

0.272**

0.08, 0.44

0

0.01

DBP

0.19

0.07

0.19

− 0.01, 0.37

0

0.07

Urine sodium

0.14

0.18

0.12

− 0.07, 0.31

0

0.23

Dessert

Sugar (g)

FBG

0.235*

0.04

0.229**

0.15, 0.48

0.00

0.01

HbA1c

0.223*

0.03

0.223*

0.04, 0.39

0

0.03

Dessert

Fat (g)

TG

0.07

0.55

− 0.08

− 0.49, 0.12

0

0.45

CHOL

− 0.15

0.16

− 0.10

− 0.27, 0.19

0

0.81

HDL-C

0.14

0.19

0.18

− 0.11, 0.35

0

0.19

LDL-C

− 0.11

0.32

− 0.15

− 0.24, 0.19

0

0.73

Dessert

Sodium (mg)

SBP

0.03

0.77

0.03

− 0.16, 0.23

0

0.77

DBP

0.01

0.92

0.01

− 0.19, 0.20

0

0.92

Urine sodium

− 0.03

0.76

− 0.05

− 0.24, 0.15

0

0.66

A la carte

Fat (g)

TG

− 0.214*

0.05

− 0.112*

0.09, 0.41

0.00

0.02

CHOL

0.11

0.31

0.07

− 0.12, 0.38

0

0.64

HDL-C

− 0.12

0.27

− 0.16

− 0.35, 0.14

0

0.13

LDL-C

0.03

0.81

0.02

− 0.11, 0.29

0

0.88

A la carte

Sodium (mg)

SBP

0.206*

0.05

0.19

0.00, 0.39

0

0.05

DBP

0.08

0.44

0.08

− 0.13, 0.29

0

0.44

Urine sodium

0.14

0.18

0.11

− 0.09, 0.33

0

0.22

Noodles

Fat (g)

TG

0.14

0.20

0.21*

− 0.15, 0.49

0

0.05

CHOL

0.05

0.67

0.02

− 0.20, 0.19

0

0.86

HDL-C

− 0.17

0.11

− 0.14

− 0.22, 0.16

0

0.19

LDL-C

0.04

0.70

0.03

− 0.13, 0.22

0

0.79

Noodles

Sodium (mg)

SBP

0.09

0.4

0.09

− 0.12, 0.29

0

0.40

DBP

0.12

0.25

0.12

− 0.07, 0.30

0

0.25

Urine sodium

0.10

0.36

0.08

− 0.12, 0.28

0

0.43

Toppings

Fat (g)

TG

0.06

0.56

0.242*

0.09, 0.34

0

0.02

CHOL

0.03

0.81

0.04

− 0.09, 0.39

0

0.75

HDL-C

0.03

0.78

0.01

− 0.20, 0.25

0

0.58

LDL-C

0.260*

0.01

0.205*

0.09, 0.35

0

0.05

Toppings

Sodium (mg)

SBP

0.05

0.66

0.05

− 0.15, 0.24

0

0.66

DBP

0.08

0.42

0.08

− 0.12, 0.29

0

0.42

Urine sodium

− 0.04

0.70

− 0.06

− 0.26, 0.16

0

0.60

  1. *Correlation is significant at the 0.05 level (2-tailed)
  2. **Correlation is significant at the 0.01 level (2-tailed)
  3. Quantities of blood test results and nutrients were log-transformed where the test of normality was significant