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TABLE 3

RR of CP in Offspring by Number of Maternal Chronic Conditions in the Medical Birth Registry of Norway

Maternal ConditionExposed No.Exposed With CP No. (per 1000)aRR (95% CI)
No autoimmune conditiona,b 1 328 494 3459 (2.6) Reference 
1 autoimmune conditiona,b 30 809 111 (3.6) 1.4 (1.1–1.7) 
>1 autoimmune conditiona,b 846 5 (5.9) 2.7 (1.1–6.6) 
No conditionsc 1 222 386 3143 (2.6) Reference 
1 conditionc 128 390 394 (3.1) 1.2 (1.1–1.4) 
2 conditionsc 9054 33 (3.6) 1.6 (1.1–2.2) 
>2 conditionsc 751 5 (6.7) 3.1 (1.4–6.8) 
Maternal ConditionExposed No.Exposed With CP No. (per 1000)aRR (95% CI)
No autoimmune conditiona,b 1 328 494 3459 (2.6) Reference 
1 autoimmune conditiona,b 30 809 111 (3.6) 1.4 (1.1–1.7) 
>1 autoimmune conditiona,b 846 5 (5.9) 2.7 (1.1–6.6) 
No conditionsc 1 222 386 3143 (2.6) Reference 
1 conditionc 128 390 394 (3.1) 1.2 (1.1–1.4) 
2 conditionsc 9054 33 (3.6) 1.6 (1.1–2.2) 
>2 conditionsc 751 5 (6.7) 3.1 (1.4–6.8) 

All analyses are adjusted for year of birth. aRR, adjusted relative risk.

a

Data available for 1999–2012.

b

Children of mothers with none, 1, or >1 autoimmune condition listed in Table 2.

c

Children of mothers with none, 1, 2, or >2 of the conditions listed in Table 2.

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