Table 2. Births and Morbidity Rates, by Year.

	2005	2006	2007	Total Period
Number of singleton births	512869	527632	532408	1572909
	Morbidities per 1000 births				Events
Composite Morbidities	2005	2006	2007	Total Period	n
Pelvic floor morbiditya	169	153	146	156	245095
Non-pelvic floor morbidityb	99	100	91	97	152089
Any pelvic or non-pelvic floor morbidity	256	241	227	241	379345
Cesarean birth counted as an additional morbidity	516	508	504	516	800836
Severe morbidityc	5.6	5.8	6.1	5.8	9190
Individual Morbidities	2005	2006	2007	Total Period	n	% of women with non-pelvic floor morbidity b
Episiotomy	148	133	125	136	213229	-
Pelvic trauma	33.1	34.1	29.3	32.2	50593	33.3
Maternal infection	28.4	28.0	26.3	27.5	43312	28.5
Postpartum hemorrhage	28.3	28.3	25.7	27.4	43124	28.4
3rd or 4th degree laceration	26.2	23.8	22.0	24.0	37759	-
Blood transfusion	5.7	6.4	6.9	6.3	9961	6.6
Severe postpartum hemorrhage	4.8	4.9	5.3	5.0	7854	5.2
Anesthetic complication	3.6	3.6	3.3	3.5	5548	3.6
Wound complication	3.4	3.7	3.3	3.5	5493	3.6
Heart failure	3.8	2.9	2.7	3.1	4897	3.2
Other pelvic floor	3.3	3.5	6.1	4.3	6766	-
Dilatation & curretage	2.7	2.5	2.7	2.6	4154	2.7
Disseminated intravascular coagulation	1.2	1.1	1.3	1.2	1890	1.2
Uterine rupture	1.0	1.0	1.1	1.0	1628	1.1
Maternal Sepsis	0.9	0.9	1	0.9	1486	1
Hysterectomy	0.7	0.8	0.8	0.8	1195	0.8
Respiratory failure	0.6	0.6	0.7	0.6	1006	0.7
Ventilation	0.5	0.5	0.5	0.5	761	0.5
Maternal shock	0.4	0.4	0.5	0.4	702	0.5
Deep vein thrombosis	0.3	0.3	0.3	0.3	502	0.3
Severe anesthetic complication	0.3	0.3	0.3	0.3	476	0.3
Renal failure	0.3	0.2	0.3	0.3	407	0.3
Puerperal cardiovascular accident	0.2	0.2	0.2	0.2	313	0.2
Pulmonary embolus	0.2	0.1	0.2	0.2	264	0.2
Maternal death during childbirth hospitalization	0.08	0.09	0.05	0.07	118	0.08

^aPelvic floor morbidity includes episiotomy, 3-4^th degree laceration, and vulvar or perineal hematoma or other trauma to vulva or perineum.

^bCesarean birth without other morbidity not counted in “any morbidity” composite. Total of individual morbidities greater than 100% as some women had more than one complication.

^cSevere morbidity = ICD9-CM or birth certificate codes present for hysterectomy, ventilation, unplanned return to operating room, transfer to intensive care, or maternal death, OR an ICD9-CM or birth certificate code for severe postpartum hemorrhage, maternal sepsis, deep vein thrombosis, pulmonary embolism, uterine rupture, respiratory failure, heart failure, hysterectomy, puerperal CVA, severe anesthetic complication, maternal shock, DIC, or renal failure and length of stay ≥90^th percentile for mode of birth.