Severe maternal morbidity due to respiratory disease and impact of 2009 H1N1 influenza A pandemic in Brazil: results from a national multicenter cross-sectional study

Table 3 Estimated risk of severe maternal outcome (SMO) among women with severe respiratory disease or other causes of severe maternal morbidity according to management procedures used for severity

Procedures associated with severity	Respiratory		PR	95 % CI*	Other causes		PR	95 % CI*
Procedures associated with severity	SMO	PLTC			SMO	PLTC
Blood transfusion	146	13	2.05	1.38–3.05	397	1010	9.78	7.26–13.18
Central venous access	190	11	2.63	1.71–4.06	125	37	13.94	10.30–18.88
ICU admission	262	75	3.84	1.94–7.59	364	1414	5.88	3.44–10.05
Hospital stay >7 days	211	65	1.97	1.32–2.95	322	2270	2.72	1.84–4.03
Invasive mechanical ventilation	204	1	3.17	2.08–4.81	86	5	15.95	11.85–21.48
Use of vasoactive drug	148	0	2.34	1.60–3.43	96	0	17.19	12.90–22.90
Transfusion of ≥5U packed red blood cells	60	0	1.83	1.37–2.45	189	0	20.70	16.15–26.53
Intubation and ventilation ≥60 min not related with anesthesia	210	0	3.35	2.23–5.05	85	0	16.86	12.70–22.37
Dialysis for acute renal insufficiency	34	0	1.75	1.35–2.26	29	0	15.35	11.52–20.46
CPR	84	0	1.93	1.46–2.55	36	0	15.52	11.66–20.67

Values in bold mean they are statistically significant (p < 0.05)
SMO severe maternal outcome (maternal near miss plus maternal death); PLTC potentially life-threatening condition; PR prevalence ratio adjusted for cluster design effect; CI confidence interval; ICU intensive care unit; CPR cardiopulmonary resuscitation
*Adjusted for design effect of cluster sampling

ISSN: 1471-2334