The Effect of Neurobehavioral Test Performance on the All-Cause Mortality among US Population

Table 1

Demographic and baseline characteristics stratified by life status.

Variable	Survivors ( = 4,764)	Deceased ()	value
Continuous variables, mean ± SD
Age (year)	36.08 ± 10.74	44.34 ± 10.79	<0.001
Systolic blood pressure (mmHg)	117.54 ± 15.75	127.30 ± 20.28	<0.001
Diastolic blood pressure (mmHg)	72.52 ± 12.51	77.44 ± 14.13	<0.001
Serum folate (ng/mL)	5.62 ± 4.43	5.64 ± 4.13	0.939
Serum C-reactive protein (mg/dL)	0.42 ± 0.59	0.59 ± 0.82	<0.001
Serum glucose (mg/dL)	94.34 ± 27.53	108.45 ± 54.28	<0.001
Body mass index	27.15 ± 6.09	28.20 ± 7.15	<0.001
Categorical variables, (%)
Male	2,129 (44.69)	214 (56.32)	<0.001
Non-Hispanic White	1,686 (35.39)	132 (34.74)	0.01
Education (before high school)	953 (20.14)	104 (27.44)	0.001
Smoker	2,265 (47.54)	264 (69.47)	<0.001
History of chronic heart failure	34 (0.71)	23 (6.05)	<0.001
History of stroke	23 (0.48)	9 (2.37)	<0.001
History of chronic bronchitis	208 (4.37)	36 (9.47)	<0.001
Cognitive function test, mean ± SD
Symbol digit substitution test	2.91 ± 1.13	3.65 ± 1.91	<0.001
Serial digit learning task: total score	5.95 ± 5.02	7.61 ± 5.36	<0.001

SD: standard deviation.