List of ICD Codes



Psychiatric diagnoses in childhood



Neurological diagnoses in childhood



Perinatal diagnoses and congenital deformities

Supplementary Table 1. Associations of IQ score with educational and occupational achievement.


Cohort


Within sibship


b (SE)

p value


b (SE)

p value

Unadjusted associations


GPA in lower secondary school (N=93,458 44,677 sibships)


IQ

0.128 (0.001)



0.093 (0.001)


IQ2

-3.55x10-5 (1.99x10-5)



-8.82x10-5 (2.73x10-5)


IQ3

-1.87x10-5 (8.13x10-7)

<0.001


-1.54x10-5 (9.71x10-7)

<0.001

Social benefits at ages 18-30 (N=108,855 52,211 sibships)



IQ

-0.027 (0.001)



-0.014 (0.001)

<0.001

IQ2

1.42x10-4 (3.04x10-5)

<0.001


-


Log of gross income at age 30 (N=228,817 108,552 sibships)


IQ

0.003 (1.67x10-4)



0.003 (2.74x10-4)


IQ2

-8.64x10-5 (9.54x10-6)

<0.001


-5.56x10-5 (1.27x10-5)

<0.001

Adjusted associations*


GPA in lower secondary school (N=93,458 44,677 sibships)


IQ

0.118 (0.001)



0.094 (0.001)


IQ2

-4.58x10-5 (1.95x10-5)



-8.05x10-5 (2.72x10-5)


IQ3

-1.78x10-5 (7.90x10-7)

<0.001


-1.58x10-5 (9.69x10-7)

<0.001

Social benefits at ages 18-30 (N=108,855 52,211 sibships)



IQ

-0.017 (0.001)



-0.011 (0.001)

<0.001

IQ2

1.00x10-4 (3.13x10-5)

0.001


-


Log of gross income at age 30 (N=228,817 108,552 sibships)


IQ

0.002 (1.97x10-4)



0.002 (3.18x10-4)


IQ2

-3.63x10-5 (1.08x10-5)

0.001


-4.23x10-5 (1.30x10-5)

0.001

*Adjusted for year of birth, ethnicity, birth region, parental education at birth, out-of-home care in childhood, psychiatric diagnoses in childhood, neurological diagnoses in childhood, and perinatal diagnoses and congenital deformities.

IQ indicates a linear IQ term, IQ2 indicates a quadratic IQ term, and IQ3 indicates a cubic IQ term.

Missing values have been imputed by use of multiple imputation.

Supplementary Figures 1-3

Supplementary Figure 1. Grade point average according to IQ.

Association is adjusted for year of birth, ethnicity, birth region, parental education at birth, out-of-home care in childhood, psychiatric diagnoses in childhood, neurological diagnoses in childhood, and perinatal diagnoses and congenital deformities.




Supplementary Figure 2. Hazard ratio for social benefits according to IQ.

Association is adjusted for year of birth, ethnicity, birth region, parental education at birth, out-of-home care in childhood, psychiatric diagnoses in childhood, neurological diagnoses in childhood, and perinatal diagnoses and congenital deformities.






Supplementary Figure 3. Gross income according to IQ.

Association is adjusted for year of birth, ethnicity, birth region, parental education at birth, out-of-home care in childhood, psychiatric diagnoses in childhood, neurological diagnoses in childhood, and perinatal diagnoses and congenital deformities.

Supplementary Table 2. Associations of IQ score with educational and occupational achievement.


Cohort


Excluded individuals


b (SE)

p value


b (SE)

p value

GPA in lower secondary school (N=93,458/N=207,090)


IQ

0.118 (0.001)



0.117 (4.81x10-4)


IQ2

-4.58x10-5 (1.95x10-5)



-7.07x10-5 (1.34x10-5)


IQ3

-1.78x10-5 (7.90x10-7)

<0.001


-1.77x10-5 (6.16x10-7)

<0.001

Social benefits at ages 18-30 (N=108,855/N=251,381)



IQ

-0.017 (0.001)



-0.017 (4.37x10-4)


IQ2

1.00x10-4 (3.13x10-5)

0.001


4.95x10-5 (2.16x10-5)

0.02

Log of gross income at age 30 (N=228,817/N=571,596)


IQ

0.002 (1.97x10-4)



0.003 (1.34x10-4)


IQ2

-3.63x10-5 (1.08x10-5)

0.001


-3.52x10-5 (5.83x10-6)

<0.001

Associations are adjusted for year of birth, ethnicity, birth region, parental education at birth, out-of-home care in childhood, psychiatric diagnoses in childhood, neurological diagnoses in childhood, and perinatal diagnoses and congenital deformities.

IQ indicates a linear IQ term, IQ2 indicates a quadratic IQ term, and IQ3 indicates a cubic IQ term.

Missing values have been imputed by use of multiple imputation.