Table 1.

Demographic and Obstetric Characteristics

	2003 (n = 4792)	2004 (n = 4719)	2005 (n = 4721)	2006 (n = 4697)	2007 (n = 4586)	2008 (n = 4492)	2009 (n = 4390)
Race
White	2948 (61.5)	2826 (60.0)	2730 (57.8)	2631 (56.0)	2512 (54.8)	2445 (54.4)	2386 (54.4)
Black	779 (16.3)	831 (17.6)	822 (17.4)	845 (18.0)	813 (17.7)	835 (18.6)	802 (18.3)
Hispanic	696 (14.5)	730 (15.5)	833 (17.6)	890 (18.9)	894 (19.5)	865 (19.3)	869 (19.8)
Asian	279 (5.8)	250 (5.3)	265 (5.6)	225 (4.8)	272 (5.9)	247 (5.5)	222 (5.1)
Other	90 (1.9)	82 (1.8)	71 (1.5)	106 (2.3)	95 (2.1)	100 (2.2)	111 (2.5)
Education	3141 (66.4)	3058 (65.4)	3032 (64.8)	3041 (64.8)	2998 (65.4)	2917 (65.0)	2911 (66.4)
Some college or greater
Married	3300 (68.9)	3207 (68.0)	3094 (65.5)	3038 (64.7)	2895 (63.1)	2859 (63.7)	2762 (62.9)
Medicaid	1376 (29.1)	1464 (31.6)	1509 (32.5)	1562 (33.8)	1434 (33.0)	1429 (33.4)	1294 (31.9)
Multiparous (parity ≥ 1)	2711 (57.2)	2729 (58.3)	2725 (58.2)	2752 (58.6)	2681 (58.5)	2560 (57.0)	2526 (57.5)
Maternal Age > 35yo	1117 (23.3)	1104 (23.4)	1157 (24.5)	1211 (25.8)	1129 (24.6)	1064 (23.7)	1028 (23.4)
Multiple Gestation	293 (6.1)	268 (5.7)	271 (5.7)	291 (6.2)	283 (6.2)	324 (7.2)	321 (7.3)
Congenital Anomalies	165 (3.5)	101 (2.2)	73 (1.6)	79 (1.7)	111 (2.4)	105 (2.3)	105 (2.4)
Preterm (< 37 wks)	600 (12.7)	619 (13.2)	639 (13.7)	647 (13.8)	664 (14.5)	645 (14.4)	624 (14.2)
Birth weight
< 2,500g	524 (11.0)	531 (11.3)	548 (11.6)	549 (11.7)	578 (12.6)	523 (11.7)	512 (11.7)
2,500g-	4188	4117	4117	4087	3962	3922	3818
4,499g	(87.5)	(87.4)	(87.3)	(87.1)	(86.5)	(87.5)	(87.2)
≥ 4,500g	75 (1.6)	64 9 (1.4)	52 (1.1)	55 (1.2)	41 (0.9)	35 (0.8)	51 (1.2)
Induction	869 (18.1)	754 (16.0)	852 (18.1)	857 (18.3)	908 (19.8)	962 (21.4)	869 (19.8)
Operative Vaginal Delivery	188 (3.9)	189 (4.0)	167 (3.5)	161 (3.4)	135 (2.9)	111 (2.5)	129 (2.9)

Data are n (%) for all live births. Some columns may not equal 100% due to missing data.