Table 6.

Forced entry linear regression analysis of relationships between the total exposure score, the number of years of employment before 1990, and previously measured mercury in urine and the cognitive functional domains adjusted for age, general ability, length of education, alcohol consumption, the SCL-90-R depression score, and previous head injuries

	Motor function			Short-term memory			Working memory			Executive function			Mental flexibility			Verbal long-term memory			Visual long-term memory
Determinants	β	p	R2*	β	p	R2	β	p	R2	β	p	R2	β	p	R2	β	p	R2	β	p	R2
Exposure score	0.21	0.05	0.11	−0.04	0.73	0.06	0.01	0.95	0.11	−0.07	0.48	0.21	−0.05	0.65	0.23	0.67	0.51	0.15	−0.13	0.23	0.12
Years work before 1990	0.19	0.15	0.09	−0.07	0.62	0.06	0.05	0.70	0.11	−0.13	0.27	0.21	−0.10	0.39	0.23	0.13	0.29	0.16	0.34	0.01	0.18
Max urine Hg value	−0.01	0.97	0.07	0.07	0.74	0.06	−0.28	0.21	0.35	0.12	0.54	0.37	0.14	0.54	0.09	−0.07	0.77	0.03	−0.58	0.01	0.30

^*Amount of explained variation by the model.