Table 4.

Agreement of perinatal outcomes between self-reported survey data and the Perinatal Data Collection, by mother, ever experienced^a for women in the Australian Longitudinal Study on Women’s Health 1973–78 cohort (NSW data only)

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

N no, Y yes

^a‘Ever experienced’ is the data pooled by mother

^bY/Y = positive survey/positive administrative

^cN/N = negative survey/negative administrative

^dY/N = positive survey/negative administrative

^eN/Y = negative survey/positive administrative

^fSelf-report data at surveys 2–4, with premature birth defined as 36 weeks or less

^gSelf-report data at surveys 5–6, with no specified gestational cut-off provided for premature birth classification