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

Table 5 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, at first-report^a (NSW data only)

Agreement of self-report survey data and administrative data						Agreement
Perinatal outcomes	Y/Y^b	N/N^c	Y/N^d	N/Y^e	Total n	% Agreement	Kappa	P-value
First-report^a
Gestational hypertension with or without proteinuria	142	2945	161	111	3359	91.9	0.47	<0.001
Gestational diabetes	78	3205	63	12	3358	97.8	0.66	<0.001
Premature birth
Live birth, less than 37 weeks^f	155	3051	115	31	3352	95.6	0.66	<0.001
Low birth weight (<2500 g)	124	3459	57	29	3669	97.7	0.73	<0.001

N no, Y yes, n number
^a‘First-report’ data is the first-reported occurrence (‘yes’ or ‘no’)
^bY/Y = positive survey/positive administrative
^cN/N = negative survey/negative administrative
^dY/N = positive survey/negative administrative
^eN/Y = negative survey/positive administrative
^fPremature birth defined as less than 37 weeks [32, 33] at surveys 5–6, as no gestational cut-off specified

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