TABLE 1

Sociodemographic and Perinatal-Neonatal Characteristics by Neurologic Examination Category

Overall CohortNeurological Examination NormalNeurological Examination Suspect Neurological Examination Abnormal Non-CPNeurological Examination Abnormal-CP
n = 2113n = 1253 (59.3%)n = 406 (19.2%)n = 207 (9.8%)n = 247 (11.7%)
Mean BWa ± SD, g760 ± 154779 ± 152755 ± 154702 ± 147720 ± 151
Mean GAa ± SD, wk25.0 ± 1.025.1 ± 0.924.9 ± 1.024.7 ± 1.124.6 ± 1.1
Male sexa, No./total No. (%)1011/2109 (48)619/1251 (49)173/406 (43)90/205 (44)129/247 (52)
Racea, No./total No. (%)
 African American887/2072 (43)528/1234 (43)179/398 (45)68/201 (34)112/239 (47)
 White1059/2072 (51)629/1234 (51)192/398 (48)118/201 (59)120/239 (50)
 Other126/2072 (6)77/1234 (6)27/398 (7)15/201 (7)7/239 (3)
Multiple births, No. (%)524 (25)315 (25)102 (25)49 (24)58 (23)
Private insuranceb, No./total No. (%)864/2108 (41)520/1249 (42)170/405 (42)84/207 (41)90/247 (36)
BPD traditionala, No./total No. (%)1244/2100 (59)659/1243 (53)263/406 (65)152/206 (74)170/245 (69)
Mean days of ventilationa ± SD 28.8 ± 25.6 (n = 2112)23.6 ± 22.2 (n = 1252)28.9 ± 24.944.1 ± 30.342.3 ± 28.1
Mean days of ventilation or CPAPa ± SD 46.8 ± 26.841.6 ± 24.847.8 ± 25.060.4 ± 30.959.6 ± 27.0
EOS, No. (%)52 (2)26 (2)12 (3)6 (3)8 (3)
LOSa, No. (%)649 (31)333 (27)125 (31)88 (43)103 (42)
NECa, No. (%)202 (10)108 (9)31 (8)29 (14)34 (14)
Severe CNS abnormality, No./total No. (%)
 Grade 3 IVHc148/2103 (7)71/1246 (6)22/405 (5)20/206 (10)35/246 (14)
 Grade 4 IVHa180/2103 (9)52/1246 (4)27/405 (7)20/206 (10)81/246 (33)
 Grade 3–4 IVH or cPVLa364/2104 (17)137/1246 (11)54/405 (13)44/206 (21)129/247 (52)
cPVLa, No./total No. (%)116/2109 (6)28/1250 (2)16/405 (4)10/207 (5)62/247 (25)
Postnatal steroidsa, No./total No. (%)455/2071 (22)228/1229 (19)102/397 (26)63/205 (31)62/240 (26)
Maternal education, No./total No. (%)
 Less than high school347/1600 (22)208/952 (22)65/309 (21)30/156 (19)44/183 (24)
 High school graduate465/1600 (29)266/952 (28)92/309 (30)47/156 (30)60/183 (33)
 Some college399/1600 (25)247/952 (26)63/309 (20)42/156 (27)47/183 (26)
 College graduate389/1600 (24)231/952 (24)89/309 (29)37/156 (24)32/183 (17)
  • Comparisons made across all 4 groups. CPAP, continuous positive airway pressure; NEC, necrotizing enterocolitis.

  • a Indicates P value is significant at <.05 (χ2 test for categorical variables, nonparametric Kruskal-Wallis test for continuous variables).

  • b Private insurance is compared with all other options (Medicaid and/or public, self-pay and/or uninsured, and other).

  • c Grade 3 IVH was not tested for significance because it is a dichotomous variable comparing grade 3 IVH versus normal, grade 1 to 2, and grade 4 IVH.