Table 1

Population characteristics

All (n=74 017)Seizure (n=8985)No seizure (n=65 032)P value
Sex, male, n (%)37 684 (50.98)*4832 (53.82)†32 852 (50.52)‡<0.001
Gestational age, weeks (SD)38.78 (1.68)38.74 (1.76)38.78 (1.67)0.371
Preterm birth (<37 weeks), n (%)4466 (6.03)605 (6.73)3861 (5.94)0.003
Birth weight, g (SD)2999 (423)§2981 (435)¶3001 (421)**<0.001
Low birth weight (<2500 g), n (%)917 (10.22)§917 (10.22)¶6062 (9.33)**0.008
Birth length, cm (SD)48.52 (2.32)††48.47 (2.42)‡‡48.52 (2.30)§§0.270
Head circumference at birth, cm (SD)33.28 (1.59)¶¶33.22 (1.62)***33.28 (1.58)†††0.006
  • Information is available for a limited number of participants for several items.

  • *n=73 924.

  • †n=8978.

  • ‡n=64 946.

  • §n=73 913.

  • ¶n=8972.

  • **n=64 941.

  • ††n=70 510.

  • ‡‡n=8591.

  • §§n=61 919.

  • ¶¶n=69 988.

  • ***n=8531.

  • †††n=61 457.