Table 5. Prediction of EPQ neuroticism and BFI personality dimensions in split-half samples using BLUP scores.

	BLUP rsq	P
EPQ neuroticism
Combined (n=9633)
Group 1	<0.001	>0.99
Group 2	<0.001	0.09
Cases (n=4813)
Group 1	0.002	0.18
Group 2	0.002	0.26
Controls (n=4820)
Group 1	0.001	0.53
Group 2	<0.001	0.66
BFI (Controls; n=4728)
Neuroticism
Group 1	<0.001	0.93
Group 2	<0.001	0.98
Extraversion
Group 1	0.01	0.24
Group 2	0.004	0.46
Openness
Group 1	<0.001	0.87
Group 2	<0.001	0.85
	Conscientiousness
Group 1	0.01	0.23
Group 2	0.02	0.20
	Agreeableness
Group 1	0.007	0.35
Group 2	0.009	0.29

Abbreviations: BFI, Big Five Inventory; BLUP, best linear unbiased predictor; EPQ, Eysenck Personality Questionnaire; P, P-value of the BLUP score component of the full model; rsq, difference in Nagelkerke pseudo-R² between the full model including BLUP score and the two primary components, and the restricted model dropping the BLUP score.