Table 2.

Outcomes

	2005–2007 (N = 5,283)	2008 (N = 1,934)	2009 (N = 1,809)	2010 (N = 1,783)	2011 (N = 1,773)	2012 (N = 1,835)	2013 (N = 1,924)	2014 (N = 1,980)	2015 (N = 2,106)	P-Trend Value
Mode of Delivery
Cesarean	1,837 (34.8)	629 (32.5)	535 (29.6)	540 (30.3)	494 (27.9)	459 (25.0)	466 (24.2)	468 (23.6)	446 (21.2)	<0.0001
Vaginal	3,446 (65.2)	1,305 (67.5)	1,274 (70.4)	1,243 (69.7)	1,279 (72.1)	1,376 (75.0)	1,458 (75.8)	1,512 (76.4)	1,660 (78.8)
Neonatal Outcomes
Gestational age at delivery (weeks)	39.3 ± 1.2	39.3 ± 1.1	39.3 ± 1.2	39.3 ± 1.1	39.3 ± 1.1	39.5 ± 1.1	39.6 ± 1.1	39.7 ± 1.1	39.6 ± 1.2	<0.0001
Birth weight (grams)	3,391 ± 455	3,385 ± 447	3,377 ± 450	3,377 ± 466	3,366 ± 447	3,370 ± 440	3,373 ± 457	3,351 ± 460	3,346 ± 455	0.0007
Apgar 1 minute <5	109 (2.1)	38 (2.0)	52 (2.9)	64 (3.6)	55 (3.1)	58 (3.2)	60 (3.1)	73 (3.7)	117 (5.6)	<0.0001
Apgar 5 minute <5	10 (0.2)	3 (0.2)	3 (0.2)	4 (0.2)	6 (0.3)	2 (0.1)	1 (0.1)	3 (0.2)	8 (0.4)	0.5697
NICU Admission >24 hours	339 (6.4)	148 (7.7)	150 (8.3)	138 (7.7)	134 (7.6)	116 (6.3)	123 (6.4)	129 (6.5)	155 (7.4)	0.9417
Meconium aspiration syndrome	5 (0.1)	4 (0.2)	5 (0.3)	3 (0.2)	8 (0.5)	7 (0.4)	9 (0.5)	10 (0.5)	19 (0.9)	<0.0001
Shoulder dystocia	38 (0.7)	18 (0.9)	13 (0.7)	19 (1.1)	23 (1.3)	15 (0.8)	17 (0.9)	14 (0.7)	17 (0.8)	0.7340
Maternal Outcomes
Episiotomy	827 (15.7)	219 (11.3)	166 (9.2)	186 (10.4)	177 (10.0)	155 (8.4)	108 (5.6)	62 (3.1)	61 (2.9)	<0.0001
Third Degree Laceration	234 (4.4)	67 (3.5)	90 (5.0)	80 (4.5)	68 (3.8)	69 (3.8)	50 (2.6)	43 (2.2)	48 (2.3)	<0.0001
Fourth Degree Laceration	21 (0.4)	3 (0.2)	6 (0.3)	8 (0.4)	6 (0.3)	6 (0.3)	7 (0.4)	5 (0.3)	8 (0.4)	0.8696
Blood transfusion	31 (0.6)	25 (1.3)	21 (1.2)	24 (1.3)	20 (1.1)	23 (1.3)	22 (1.1)	30 (1.6)	30 (1.4)	0.0005

Data are presented as mean ± standard deviation or n (%).

NICU, neonatal ICU.