Cognitive Functions across the GNB3 C825T Polymorphism in an Elderly Italian Population

Table 2

Mean scores of the neuropsychological tests recorded in the study cohort. Italian normative scores for the same age and education are also shown [23].

Tests	Values from the cohort; (𝑛=220)	Normative scores; (𝑛=63)	𝑃 value
Digit span score	5.9±1.4	5.5±1.0	0.06 (ns)
Immediate prose memory score	9.0±4.5	11.1±3.4	<0.001
Delayed prose memory score	10.5±5.8	13.8±4.3	<0.0001
MI 10 score	3.7±3.1	5.6±2.5	<0.0001
MI 30 score	1.4±2.5	5.3±2.2	<0.0001
Trail making test A (seconds)	70.8±35.0	77.9±38.2	0.7 (ns)
Trail making test B (seconds)	159.4±64.7	200.6±84.0	<0.001
Verbal fluency score	8.4±4.0	11.1±2.9	<0.0001
Abstraction score	2.8±2.1	4.5±1.7	<0.0001
Overlapping figure score	17.9±9.1	30.4±7.0	<0.0001
Figure copying score	1.6±0.6	1.5±0.5	0.3 (ns)
Figure drawing score	1.5±0.7	1.9±0.3	<0.0001
Clock drawing task score	6.6±3.6	8.1±2.3	<0.003

MI: memory with interference; ns: nonsignificant difference.