Table 1 Summary of individual and county-level characteristics from years 2005 to 2012. (n = 57,917)

 Y_NMRD

Death indicator: 1 = Death due to Non-Malignant Respiratory Disease

0.11

0.32

0

17

 edu

Years of education

10.08

3.56

0

17

 age

Age in years

72.24

17.55

0

109

 I_white

Race indicator: 1 = white

0.83

0.38

0

1

 I_black

Race indicator: 1 = black

0.17

0.38

0

1

 I_other

Race indicator: 1 = other race except for white and black

0.002

0.05

0

1

 female

Gender indicator: 1 = female

0.50

0.50

0

1

 I_single

Marital status indicator: 1 = single

0.11

0.31

0

1

 I_married

Marital status indicator: 1 = married

0.39

0.49

0

1

 I_widowed

Marital status indicator: 1 = widowed

0.38

0.48

0

1

 I_divor

Marital status indicator: 1 = divorced

0.13

0.33

0

1

 R_unemploy

Unemployment rate

0.07

0.02

0.03

0.1

 Income

Median household income in 1000 dollars

35.88

4.12

25.2

52.4

 I_metro

Rural-urban indicator: 1 = county in a metro area

0.28

0.45

0

1

 I_nonmetro

Rural-urban indicator: 1 = nonmetropolitan county with the urban population more than 2500

0.33

0.47

0

1

 I_rural

Rural-urban indicator: 1 = nonmetropolitan county completely rural with less than 2500

0.39

0.49

0

1

 R_inactivity

Age-adjusted leisure-time physical inactivity prevalence percent

0.28

0.03

0.2

0.4

 R_obesity

Age-adjusted obesity rate

0.30

0.03

0.2

0.4

 R_smoking

Age-standardized total cigarette smoking prevalence rate

0.28

0.02

0.2

0.3

 bed_per1000

Hospital beds per 1000 population

3.08

3.85

0

15.1

 hcenter_per1000

Federal qualified health centers per 1000 population

0.06

0.07

0

0.3

 doctor_per1000

M.D. and D.O. total active non-Fed & fed per 1000 population

1.11

0.84

0.1

2.9

 R_insur

Percent insured under 65 years (%)

83.70

1.79

78.9

88.2

 d_>2007^d

Switch indicator: 1 = year after 2007

0.62

0.49

0

1

 Prod

County coal production (million tons)

1.23

2.87

0

11.8

 Surface

County surface coal production (million tons)

0.52

1.37

0

6.7

 Surface%

Percent of surface mining coal (%)

11.35

20.66

0

71.7

 d_incoal

Coal indicator: 1 = live with living in a coal-mining county

0.34

0.47

0

1

 d_adjcoal

Coal indicator: 1 = living in an adjacent county of coal-mining counties

0.18

0.38

0

1