Table 4.

Risk of cerebral palsy following invasive GBS infection, in the total population and among infants born preterm (i.e., before gestational week 37) or at term (gestational week 37 or later)^a.

	Cerebral palsy		OR (95% CI)
	Yes	No
	N (%)b	N (%)b
All children
GBS infection	24 (4.1)	557 (95.9)	22.9 (15.1–34.5)
No GBS infection	1887 (0.19)	1,001,631 (99.8)	1.0 (ref.)
Premature
GBS infection	11 (6.6)	156 (93.4)	6.1 (2.9–11.3)
No GBS infection	735 (1.1)	63,631 (98.9)	1.0 (ref.)
Term
GBS infection	12 (3.0)	388 (97.0)	25.7 (14.4–45.7)
No GBS infection	1104 (0.12)	915,954 (99.9)	1.0 (ref.)

GBS Group B Streptococcus.

^aInformation on gestational age was missing in 14 (2.2%) GBS cases and 22,239 (2.2%) cases without GBS.

^bPercentages are shown in rows.