Table 3

 Prevalence and odds ratios of cerebral palsy in ED quintiles (singleton births)

% of total singleton birthsChildren with CPTotal childrenPrevalence/1000OR (95% CI) (quintile 1 as reference)OR adjusted for BW and gestation (95% CI)
Quintile 119.234196911.71.001.00
Quintile 217.141175632.31.25 (0.82 to 1.91)1.39 (0.91 to 2.14)
Quintile 317.045174282.61.38 (0.91 to 2.09)1.55 (1.02 to 2.35)
Qunitile 418.849193302.51.35 (0.90 to 2.03)1.39 (0.92 to 2.10)
Quintile 523.675242553.11.65 (1.14 to 2.39)1.55 (1.06 to 2.25)
Quintile missing4.2114342
χ2 for linear trend7.57 (p = 0.006)