Table 3. Association between medical risk factors for dementia and cognitive test scores in PROTECT Norge^a.

Medical risk factorsb	Digit span		PALc		Verbal reasoning		Self-ordered search
	t test (df)	P value	t test (df)	P value	t test (df)	P value	t test (df)	P value
Hypertension	2.3 (3212)	.02	2.7 (3212)	.006	2.4 (3212)	.02	1.5 (3212)	.13
Hearing loss	3.6 (3212)	<.001	3.5 (3212)	<.001	2.9 (3212)	.004	1.7 (3212)	.09
Smoking	3.0 (3212)	.003	2.5 (3212)	.007	2.8 (3212)	.005	2.7 (3212)	.007
BMI >30	1.9 (3212)	.06	1.5 (3212)	.07	4.3 (3212)	<.001	3.1 (3212)	.002

^aPROTECT Norge: Platform for Research Online to Investigate Genetics and Cognition in Ageing Norge.

^bThis table displays the association between various medical risk factors for dementia and cognitive test scores among participants in the PROTECT Norge study. Statistical significance is indicated by t values, including degrees of freedom and corresponding P values (P).

^cPAL: paired associate learning.