Table 3.

Prevalence of Postpartum Hospitalizations and Emergency Department Visits among Singleton Deliveries to Women with and without IDD in Massachusetts, 2002–2012, N=779,513

Hospitalization type	IDD (n=1,104)		Non-IDD (n=778,409)		p*
1–42 DAYS
Any hospitalizations	22	2.0	6,180	0.8	<0.01
2+ hospitalizations	<11	0.5	503	0.1	<0.01
Length of hospital stay
Average, (SE)a	4.3	0.7	4	0.3	0.36
Median, (IQR)	3.5	2,5	3	2,4	-
Any postpartum ED visits	129	11.7	27,536	3.5	<0.01
2+ ED visits	93	8.4	12,352	1.6	<0.01
4+ ED visits	66	6.0	4,604	0.6	<0.01
43–90 DAYS
Any hospitalizations	<11	0.5	1,606	0.2	0.07
2+ hospitalizations	<11	0.2	251	0.0	<0.01
Length of hospital stay
Average, (SE) a	4.5	0.3	3.4	0.06	<0.01
Median, (IQR)	4	4,5	3	2,4	-
Any postpartum EDc visits	79	7.2	19,275	2.5	<0.01
2+ ED visits	61	5.5	8,985	1.2	<0.01
4+ ED visits	33	3	2,893	0.4	<0.01
91–365 DAYS
Any hospitalizations	51	4.6	7,928	1.0	<0.01
2+ hospitalizations	19	1.7	1,108	0.1	<0.01
Length of hospital stay
Average, (SE) a	3.8	0.3	3	0.03	0.08
Median, (IQR)	3	2,4	3	2,4	-
Any postpartum ED visits	215	19.5	85,507	11.0	<0.01
2+ ED visits	92	8.3	21,574	2.8	<0.01
4+ ED visits	33	3.0	3,663	0.5	<0.01

Source: Pregnancy to Early Life Longitudinal (PELL) Data, 2002–2012

^*p-values for differences, χ² -test, t-test or two-sample Wilcoxon-Mann-Whitney test.

Data are n(%) of deliveries, unless otherwise specified

Notes: To maintain confidentiality, cells with <11 cases cannot be reported;

^aTwo-sample Wilcoxon-Mann-Whitney (WMW) test is used to test the differences in average and median number of hospitalization by comparison groups.

Abbreviations: IDD - Intellectual and developmental disability; ED-emergency department; IQR-Inter quartile range; SE-standard deviation.