Table 3.

Comparisons of the Five Clusters on Biomedical and Sociodemographic Variables*

A.
Average–
Stable
B.
Average–
Declined to
Low Average
C.
Average–
Declined
to Below
Average
D.
Very Low–
Increased
to Low
Average
E.
Very Low–
Stable
P
level
Birth weight N2748881624
 M1238.01254.71190.41031.3976.7<.001
 SD213.6202.8200.9267.9211.9
 % ≤1000 g21%15%15%50%54%
Gestational Age (GA) N
2748881624
 M31.231.331.129.929.3<.001
 SD2.41.71.92.52.3
Small for GA N
2748881624
 % SGA33%31%41%44%46%N.S.
NHI N
2746851624
 M89.994.386.487.473.4<.01
 SD15.215.124.914.723.1
Neurological Status N
2648881624
 % Abnormal11.5%2.1%9.1%18.8%70.8%χ2= 75.6
 % Suspicious42.2%35.4%52.3%68.8%20.8%df= 8
 % Normal42.3%62.5%38.6%12.5%8.3%<.0001
Head Circumference N
1734691119χ2 = 15.3
df = 4
 % <tenth percentile18%21%32%27%68%<.005
Gender N
2748881624χ2 = 15.3
df = 4
 % Male26%38%44%69%71%<.005
Maternal Education N
2748881624χ2 = 17.4
df = 4
 % <High School Graduate11%35%49%38%63%<.005
  • * No significant differences between clusters were found for multiple birth, early intervention, or foster care placement; insufficient data precluded analysis for other variables.

  • Mean group differences tested by one-way ANOVAs; results of post-hoc LSD procedures for birth weight: Clusters D, E < A, B, C; gestational age: Cluster E < A, B, C; Cluster D < B, C; NHI: Cluster E < A, B, C, D; Cluster C < B.

  • Categorical data tested with χ2 analyses. See text for results of partitioning degrees of freedom (Maxwell, 1967).