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Table 2 Differences in intakes reported by photo method across all measurement days (n = 57 total) according to review question status

From: “Everyone can take photos.” Feasibility and relative validity of phone photography-based assessment of children’s diets – a mixed methods study

  

Spearman’s rho1

 

Mean intakes (dl/d)

 

All days

Answer received

No answer

No question

Answer received

No answer

No question

Category

n = 57

n = 19

n = 20

n = 18

Recall

Photo

Diff. (%)

Recall

Photo

Diff. (%)

Recall

Photo

Diff. (%)

Fruit and vegetables

0.655

**

0.853

**

0.593

**

0.437

 

2.92

2.18

−25

2.39

1.30

−46

1.95

1.37

−30

Energy dense foods

0.742

**

0.684

**

0.605

**

0.792

**

0.49

0.52

6

0.36

0.07

−80

0.53

0.38

−28

Sweet drinks

0.812

**

0.846

**

0.921

**

0.651

**

1.21

1.03

−15

0.88

0.71

−19

0.99

0.80

−19

  1. 1 Correlation between intakes measured by photo method and intakes measured by 24HR
  2. Answer received = a review question was sent in the evening, and an answer was received. No answer = a review question was sent but no answer was received. No question = a review question was not sent on that day
  3. Diff. = Difference
  4. ** P < 0.01