Table 1 Descriptions and summary statistics for included variables

Quality of life

Generally feeling happy

Points

2,995

3.58

0.88

1

5

Happiness with relationships

2,890

5.89

1.61

1

7

Chronic inflammation

C-reactive protein

mg/L

1,939

3.20

6.03

0

100

Sex

Female

Yes/No

3,005

0.52

0.50

0

1

Male

0.48

0.50

Age

Years of age

Years

3,005

69.3

7.85

57

85

57 to 64

Yes/No

3,005

0.34

0.47

0

1

65 to 74

0.36

0.48

75 to 85

0.30

0.46

Education

Years of education

Years

2,971

12.48

4.10

0

32

Less than high school

Yes/No

3,005

0.23

0.42

0

1

High school or equivalent

0.26

0.44

Some college

0.28

0.45

Finished college

0.22

0.41

Race

White

Yes/No

2,993

0.70

0.46

0

1

Any minority

0.30

0.46

Black

0.17

0.38

Hispanic

0.10

0.30

Other race

0.02

0.15

Income

Household earnings

$/year

2,124

51,264

76,559

0

1,800,000

Social support and communication

Open with partner

Points

2,012

2.71

0.54

1

3

Open with friends

2,704

2.02

0.73

Relying on family

Points

2,793

2.57

0.65

1

3

Relying on friends

2,680

2.30

0.71

Relationship status

Married

Yes/No

3,005

0.60

0.49

0

1

Cohabitating

0.02

0.14

Separated

0.02

0.13

Divorced

0.11

0.31

Widowed

0.22

0.41

Never married

0.04

0.19