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Table 4 Agreement of perinatal outcomes between self-reported survey data and the Perinatal Data Collection, by mother, ever experienceda for women in the Australian Longitudinal Study on Women’s Health 1973–78 cohort (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

Ever experienceda

        

Gestational hypertension with or without proteinuria

159

1505

177

70

1911

87.1

0.49

<0.001

Gestational diabetes

68

1667

158

18

1911

90.8

0.40

<0.001

Premature birth

        

 Live birth, 36 weeks or lessf

57

1134

66

20

1277

93.3

0.54

<0.001

 Live birth, less than 37 weeksg

98

1197

118

28

1441

89.9

0.52

<0.001

Low birth weight (<2500 g)

89

1641

75

39

1844

93.8

0.58

<0.001

  1. N no, Y yes
  2. a‘Ever experienced’ is the data pooled by mother
  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. fSelf-report data at surveys 2–4, with premature birth defined as 36 weeks or less
  8. gSelf-report data at surveys 5–6, with no specified gestational cut-off provided for premature birth classification