Table 3

Z-score of grade point average as a risk factor for bipolar disorder, fully adjusted, by gender

Standardised grade category Hazard ratio (95% CI)
Males Females
< -2 2.07 (0.88-4.87) 1.84 (0.79-4.28)
-2 to -1 1.01 (0.57-1.76) 1.32 (0.81-2.15)
-1 to +1 1.00 1.00
+1 to +2 1.06 (0.64-1.73) 1.40 (0.92-2.14)
> +2 4.37 (2.25-8.48) 0.86 (0.12-6.22)