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Table 5 Compare between correlation and bootstrapping a correlation of energy 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

Energy (kcal)

FBG

− 0.03

0.76

− 0.07

− 0.29, 0.16

0

0.50

HbA1c

0.03

0.82

0.03

− 0.21, 0.27

0

0.82

Beverage

Energy (kcal)

FBG

− 0.05

0.66

− 0.02

− 0.31, 0.10

0

0.86

HbA1c

− 0.07

0.55

− 0.07

− 0.32, 0.19

0

0.55

Snack

Energy (kcal)

FBG

− 0.16

0.12

− 0.12

− 0.30, 0.17

0

0.26

HbA1c

− 0.05

0.68

− 0.05

− 0.23, 0.20

0

− 0.05

Snack

Energy (kcal)

TG

0.21

0.06

0.238*

0.11, 0.35

0

0.01

CHOL

− 0.08

0.46

− 0.10

− 0.29, 0.16

0

0.36

HDL-C

− 0.17

0.11

− 0.15

− 0.25, 0.25

0

0.15

LDL-C

− 0.10

0.33

− 0.14

− 0.31, 0.21

0

0.18

Snack

Energy (kcal)

SBP

− 0.07

0.57

− 0.07

− 0.28, 0.15

0

0.57

DBP

0.04

0.74

0.04

− 0.18, 0.25

0

0.74

Urine sodium

0.07

0.55

0.07

− 0.17, 0.30

0

0.54

Dessert

Energy (kcal)

FBG

− 0.03

0.76

− 0.04

− 0.31, 0.15

0

0.69

HbA1c

− 0.08

0.52

− 0.08

− 0.29, 0.23

0

0.52

Dessert

Energy (kcal)

TG

− 0.223*

0.04

− 0.239*

− 0.44, − 0.09

0

0.02

CHOL

0.16

0.14

0.235*

0.15, 0.52

0.00

0.03

HDL-C

0.10

0.37

0.11

− 0.36, 0.47

0

0.28

LDL-C

− 0.13

0.24

− 0.13

− 0.25, 0.23

0

0.22

Dessert

Energy (kcal)

SBP

− 0.05

0.67

− 0.05

− 0.30, 0.21

0

0.67

DBP

− 0.02

0.89

− 0.02

− 0.27, 0.23

0

0.89

Urine sodium

0.01

0.94

0.03

− 0.22, 0.27

0

0.82

A la carte

Energy (kcal)

TG

0.15

0.15

0.11

− 0.17, 0.28

0

0.29

CHOL

− 0.05

0.61

− 0.03

− 0.24, 0.16

0

0.81

HDL-C

0.04

0.74

0.04

− 0.11, 0.30

0

0.73

LDL-C

− 0.12

0.27

− 0.08

− 0.12, 0.09

0

0.44

A la carte

Energy (kcal)

SBP

0.04

0.75

0.04

− 0.20, 0.26

0

0.75

DBP

0.02

0.84

0.02

− 0.22, 0.26

0

0.84

Urine sodium

− 0.01

0.96

0.00

− 0.24, 0.24

0

0.97

Noodles

Energy (kcal)

TG

− 0.14

0.17

− 0.20

− 0.33, 0.09

0

0.09

CHOL

− 0.06

0.59

− 0.01

− 0.22, 0.11

0

0.93

HDL-C

0.13

0.21

0.16

− 0.29, 0.26

0

0.13

LDL-C

− 0.06

0.59

− 0.06

− 0.20, 0.28

0

0.58

Noodles

Energy (kcal)

SBP

− 0.01

0.92

− 0.01

− 0.24, 0.21

0

0.92

DBP

0.02

0.85

0.02

− 0.22, 0.26

0

0.85

Urine sodium

0.04

0.72

0.05

− 0.18, 0.28

0

0.67

Toppings

Energy (kcal)

TG

0.234*

0.03

0.213*

0.22, 0.37

0

0.04

CHOL

0.03

0.81

0.03

− 0.24, 0.21

0

0.80

HDL-C

0.02

0.98

0.03

− 0.22, 0.25

0

0.78

LDL-C

− 0.06

0.59

− 0.10

− 0.38, 0.09

0

0.33

Toppings

Energy (kcal)

SBP

− 0.13

0.27

− 0.13

− 0.34, 0.10

0

0.27

DBP

− 0.11

0.36

− 0.11

− 0.32, 0.11

0

0.36

Urine sodium

− 0.09

0.45

− 0.09

−0.33, 0.16

0

0.43

  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