TABLE 2

Trends in Birth Prevalence (Prev) of Congenital Spastic CP Per 1000 1-y Survivors by Birth Weight and Gestational Age, Birth Years 1985 to 2002a

Characteristic198519861988199219941996199820002002PR (95% CI)aAverage Annual Change, % (95% CI)
nPrevnPrevnPrevnPrevnPrevnPrevnPrevnPrevnPrev
Birth weight overall , g571.87641.99451.25621.6761.9751.9872.0871.8871.70.28 (−1.24 to 1.82)
 <15002165.632365.711437.742244.43266.42854.84466.43753.72840.868.0 (57.4 to 80.6)−0.73 (−3.2 to 1.82)
 1500 to 2499158.16147.0973.10187.1145.5114.1134.4113.3226.26.6 (5.3 to 8.1)−2.02 (−5.56 to 1.66)
 ≥2500210.74270.91240.72220.6300.8361.0300.7390.9370.8Referent0.46 (−1.03 to 1.98)
Gestational age overall , wks551.88571.84401.23621.65761.94741.83871.96871.76871.740.46 (−1.01 to 1.95)
 <322147.951840.911329.682639.83556.33047.74154.73746.12634.651.1 (43.1 to 60.6)0.34 (−1.03 to 1.98)
 32 to 36124.3393.0320.58123.1133.582.1153.5143.0193.83.4 (2.8 to 4.3)1.44 (−3.26 to 6.37)
 ≥37220.85301.13250.87240.7280.8361.0310.8360.8420.9Referent−0.34 (−1.93 to 1.28)
  • a Normal birth weight (≥2500 g) and term gestational age (≥37 wks) served as referent groups for their respective analyses.