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Table 5 Bland-Altman statistics comparing the dietary intake from the IOS or IOS + SFFQ and the 7DFD (n = 221)

From: Relative validity of an intelligent ordering system to estimate dietary intake among university students from a medical school in Shanghai, China

 

IOS vs. 7DFD

IOS + SFFQ vs. 7DFD

Mean Difference

95% LOAa

Mean Difference

95% LOAa

Energy (kcal)

388.5

-230, 1007.1

137.7

-597.8, 873.2

Protein (g)

17.4

-21.4, 56.2

10.4

-30.6, 51.4

Fat (g)

14.5

-12, 41

6.4

-26.5, 39.3

Carbohydrate (g)

49.9

-33, 132.7

10.6

-93.8, 114.9

Cereals (g) b

23.2

-46.2, 91.9

Tubers (g) b

6.4

-25.6, 38.4

Vegetables (g) b

2.8

-98.3, 103.1

Fruits (g)

90.0

-150.4, 330.4

-3.3

-267.7, 261.1

Animal-sourced foods (g) b

44.2

-70, 157.7

Milk and dairy products (g)

69.3

-101.8, 240.2

-37.7

-264.5, 188.9

Soybeans and nuts (g)

2.01

-10.7, 14.7

-4.99

-43, 33

Salt equivalents (g) b

0.82

-2.5, 4.1

Oil (g) b

4.58

-8.9, 18

Added sugar (g)

10.3

-10.4, 30.9

-6.53

-64.5, 51.4

  1. a Lower and upper limit of agreement: mean difference ± 1.96 SD
  2. b Comparison results between the IOS + SFFQ and the 7DFD were consistent with those obtained when comparing the IOS and the 7DFD, thus denoted by “…” to signify repetition