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Table 3 Breastfeeding duration by categories and distribution of recall error (n=374)

From: Maternal recall of breastfeeding duration twenty years after delivery

 

Recalled breastfeeding duration, months

Distribution of recall error, n (%)

Recorded breastfeeding duration, months

Never

>0 - 3

4 - 6

7 - 9

10 -12

≥13

Total

ƙa

Underreport

Exact recall

Overreport

Never

0

0

0

0

0

0

0

    

>0 - 3

8

63

22

6

0

0

99

0.70

8 (8.1)

63 (63.6)

28 (28.2)

4 - 6

0

3

49

24

4

1

81

0.47

3 (3.7)

49 (60.5)

29 (38.8)

7 - 9

0

0

13

72

20

3

108

0.50

13 (12.0)

72 (66.7)

23 (21.3)

10 -12

0

0

1

12

37

7

57

0.53

13 (22.8)

37 (64.9)

7 (12.3)

≥13

0

0

0

1

4

24

29

0.72

5 (17.2)

24 (82.6)

0 (0)

Total

8

66

85

115

65

35

374

0.85

42 (11.2)

245 (65.5)

87 (23.2)

  1. a Kappa statistics were calculated for each of the categories in relation to all of the other categories in 2×2 tables, as well as overall weighted ƙ for the ordinal multi categories of breastfeeding duration. All p-values <0.001.