Table 2

Frequency and quantity of feeds (16 items)

Question wording

    Test-retest reliability
    a

    Validity
    b

Questionc

Corrd

%Age

Kapf

Corrd

%Age

Kapf

Median

Range


Breastfeeding

In a typical 24 hour period, how many breastfeeds does your baby have?

Number of feeds directly from the breast (n = 20)

3a

0.92

47.4

0.41

0.86

26.7

0.20

6

0-12

Number of feeds of expressed breast milk (n = 17)

3b

0.84

91.7

0.85

0.58

75.0

0.57

0

0-8

Amount of expressed breast milk per feed (n = 12)

5

0.87

70.0

0.61

0.88

62.5

0.55

30 ml

0-250 ml

How many minutes does a typical daytime breastfeed directly from the breast last? (n = 19)

4

0.91

50.0

0.44

0.88

43.8

0.37

10 mins

0-30 mins

Formula-feeding

In a typical 24 hour period, how much formula milk does your baby have?

Amount of formula milk per feed (n = 26)

7a

0.74

52.2

0.43

0.79

58.3

0.47

210 ml

60-960 mls

Number of formula feeds per day (n = 25)

7b

0.57

73.9

0.68

0.58

45.5

0.37

4

1-8

How many minutes does a typical daytime bottle feed last? (n = 25)

8

0.81

63.6

0.54

0.94

52.2

0.44

15 mins

5-30 mins

Most of the time, how much milk is left in the bottle when your baby has finished feeding?

none, a little, or a lot (n = 25)

9

0.84

91.3

0.78

0.63

83.3

0.57

72%- a little

What was your baby's age in weeks when you first started formula feeds? (n = 26)

10

0.82

62.5

0.51

0.94

64.0

0.55

1.5 wks

0-15 wks

How many scoops of formula milk powder do you usually use per feed? (n = 25)

11d

0.73

73.9

0.62

0.64

70.6

0.52

7 scoops

2-8 scoops

Other drinks

If your baby has water, how much water does your baby have?

Amount of water per drink (n = 30)

13a

0.75

63.0

0.57

0.75

58.3

0.51

17.5 ml

0-150 ml

Number of drinks of water per day (n = 28)

13b

0.83

80.0

0.74

0.70

56.5

0.45

1

0-4

Does your baby have any drink other than milk or water? Yes OR No (n = 40)

14

0.88

97.4

0.87

0.72

91.7

0.68

90%- No

Solids/Semi-solids

Does your baby have any solid/semi-solid food? Yes OR No (n = 40)

15a

0.84

94.7

0.83

0.84

94.6

0.82

80%-Yes

What was your baby's age in months when you started solid/semi-solid food? (n = 32)

15b

0.91

83.3

0.75

0.82

67.9

0.54

5 mo

4-6mo

How many times per day does your baby have solid/semi-solid food? (n = 32)

15c

0.63

73.3

0.63

0.60

65.5

0.49

3

1-4


aTest-retest reliability-1st and 2nd questionnaires

bValidity-1st questionnaire and interview

cQuestion- Question number

dCorr-Spearman's correlation coefficient

e%Ag- Percentage exact agreement- over 66% good agreement

fKap- Chance corrected agreement or Cohen's Kappa- < 0 poor; 0-0.20 slight; 0.21-0.40 fair; 0.41-0.60 moderate; 0.61-0.8 substantial; 0.81-1 almost perfect

Lakshman et al. International Journal of Behavioral Nutrition and Physical Activity 2011 8:35   doi:10.1186/1479-5868-8-35

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