Table 2.

Baseline characteristics by sex-specific Spielberger State-Trait Personality Inventory quartiles.

Variable	Quartile 1 (n = 1,804)	Quartile 2 (n = 1,718)	Quartile 3 (n = 1,102)	Quartile 4 (n = 1,175)
Weight (kg)	79.55 (17.03)	78.76 (17.33)	78.8 (17.16)	78.09 (17.20)
Age	63.07 (9.87)	61.35 (9.90)	60.96 (10.25)	60.79 (10.22)
Percentage of female	54.1	54.2	51.8	48.4
Race/ethnicity (%)*
White	37.8	40.4	40.5	44.0
Chinese	9.2	12.4	12.6	14.4
Black	32.0	27.1	25.5	19.0
Hispanic	21.0	20.1	21.4	22.6
Income level (%)*
<$5,000–19,999	19.9	18.4	22.3	27.2
$20,000–49,999	35.0	37.0	37.9	38.5
$50,000–100,000+	45.1	45.6	39.8	34.3
Marital status (%)*
Married/living as married	62.0	64.4	59.0	59.7
Widowed	14.0	11.6	12.0	10.8
Divorced	13.6	12.7	14.9	13.5
Separated	2.7	3.2	3.3	4.5
Never married	7.0	7.2	9.9	10.6
Prefer not to answer	0.7	1.0	0.9	0.8
Education level (%)*
No schooling	0.5	0.3	0.6	1.3
Grades 1–8	7.7	6.7	8.7	9.9
Grades 9–11	7.2	5.4	6.6	7.1
High school/GED	16.7	17.6	17.5	21.1
Some college-no degree	16.6	16.1	17.0	15.7
Technical school certificate	7.4	7.1	7.4	6.6
Associate degree	4.8	6.4	4.9	4.3
Bachelor's degree	19.5	18.2	19.0	16.3
Grad./professional degree	19.6	19.9	18.2	17.6

*P < 0.017.