Table III.

Odds ratios and 95% confidence intervals of higher education, in relation to dose.

Dose (mGy)	Crude odds ratio (95% CI)	Multivariate* odds ratio (95% CI)
Anterior	n = 2559	n = 2559
0	1.00	1.00
1–20	0.86 (0.68–1.09)	0.97 (0.75–1.24)
> 20–100	1.05 (0.82–1.35)	1.09 (0.83–1.42)
> 100–250	0.84 (0.62–1.13)	0.97 (0.70–1.33)
> 250	0.93 (0.60–1.44)	0.88 (0.56–1.41)
Odds ratio per 50 mGy	0.99 (0.97–1.02)	0.99 (0.97–1.02)
Posterior	n = 2559	n = 2559
0	1.00	1.00
1–20	0.86 (0.68–1.08)	0.97 (0.76–1.23)
> 20–100	0.96 (0.76–1.21)	1.02 (0.79–1.30)
> 100–250	0.87 (0.65–1.31)	1.00 (0.65–1.54)
> 250	0.99 (0.55–1.77)	1.02 (0.55–1.89)
Odds ratio per 50 mGy	0.99 (0.95–1.02)	0.99 (0.95–1.02)
Hippocampus	n = 2559	n = 2559
0	1.00	1.00
1–20	0.90 (0.70–1.15)	1.00 (0.77–1.30)
> 20–100	0.85 (0.68–1.07)	0.91 (0.71–1.15)
> 100–250	1.07 (0.76–1.51)	1.18 (0.82–1.69)
> 250	0.86 (0.50–1.47)	0.88 (0.50–1.55)
Odds ratio per 50 mGy	1.00 (0.99–1.02)	1.00 (0.99–1.02)

*Adjusted for age at treatment, year at birth and parents’ education.