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Table 6 Agreement of perinatal outcomes between self-reported survey data and the Perinatal Data Collection for each child born to women in the Australian Longitudinal Study on Women’s Health 1973–78 cohort, for complete and consistent reportsa (NSW data only)

From: Agreement between self-reported perinatal outcomes and administrative data in New South Wales, Australia

Agreement of self-report survey data and administrative data

Agreement

Perinatal outcomes

Y/Yb

N/Nc

Y/Nd

N/Ye

Total n

% Agreement

Kappa

P-value

Complete and consistent reporta

Gestational hypertension with or without proteinuria

63

1730

49

49

1891

94.8

0.54

<0.001

Gestational diabetes

37

1894

20

5

1956

98.7

0.74

<0.001

Premature birth

 Live birth, less than 37 weeksf

60

1807

28

5

1900

98.3

0.76

<0.001

Low birth weight (<2500 g)

30

1099

7

4

1140

99.0

0.84

<0.001

  1. N no, Y yes, n number
  2. a‘Complete and consistent report’ includes women who reported the same response (either ‘yes’, ‘no’ or ‘missing’) and completed all surveys (surveys 4–6 for low birth weight, and surveys 5–6 for gestational hypertension with or without proteinuria, gestational diabetes and premature birth (37 completed weeks or less)) for each child
  3. bY/Y = positive survey/positive administrative
  4. cN/N = negative survey/negative administrative
  5. dY/N = positive survey/negative administrative
  6. eN/Y = negative survey/positive administrative
  7. fPremature birth defined as less than 37 weeks [32, 33] at surveys 5–6, as no gestational cut-off specified