Table 2 Sample characteristics stratified by BMI presented as weighted sample size (Unweighted n = 96,697)

Age

61.5 ± 0.1

65.9 ± 0.2

62.9 ± 0.2

58.0 ± 0.2

<  0.001

Female

118,073,895 (12.6%)

27,062,571 (12.7%)

38,864,259 (11.6%)

52,147,065 (13.3%)

<  0.001

Marital status

<  0.001

 Married

548,568,787 (58.4%)

113,574,344 (53.2%)

204,921,087 (61.4%)

230,073,356 (58.7%)

 Widowed

145,934,265 (15.5%)

48,649,769 (22.8%)

50,657,870 (15.2%)

46,626,626 (11.9%)

 Divorced

133,376,145 (14.2%)

28,249,208 (13.2%)

45,107,797 (13.5%)

60,019,140 (15.3%)

 Separated

20,487,099 (2.18%)

3,851,026 (1.8%)

6,186,703 (1.85%)

10,449,370 (2.67%)

 Never married

90,453,865 (9.63%)

19,030,383 (8.92%)

26,914,200 (8.06%)

44,509,282 (11.4%)

Health insurance

<  0.001

 Any private

616,141,312 (65.6%)

132,435,177 (62.1%)

224,022,303 (67.1%)

259,683,832 (66.3%)

 Public only

268,783,570 (28.6%)

71,304,323 (33.4%)

92,063,226 (27.6%)

105,416,020 (26.9%)

 Uninsured

53,910,150 (5.74%)

9,615,230 (4.51%)

17,711,982 (5.31%)

26,582,938 (6.79%)

Employment

<  0.001

 Employed

429,783,368 (45.8%)

75,662,429 (35.6%)

153,705,062 (46.2%)

200,415,877 (51.3%)

 Not employed

505,727,921 (53.9%)

136,759,689 (64.4%)

179,001,926 (53.8%)

189,966,305 (48.7%)

Wage

21,338 ± 266

16,621 ± 396

22,640 ± 386

22,797 ± 350

<  0.001

Smoke

137,182,754 (14.6%)

37,266,102 (17.5%)

46,438,935 (13.9%)

53,477,717 (13.7%)

<  0.001

Depression

<  0.001

 No depression

724,868,599 (77.2)

169,372,686 (79.4%)

267,335,467 (80.1%)

288,160,446 (73.6%)

 Unrecognized depression

50,539,118 (5.38%)

11,865,490 (5.56%)

16,193,934 (4.85%)

22,479,693 (5.74%)

 Asymptomatic depression

122,568,131 (13.1%)

24,541,148 (11.5%)

39,114,031 (11.7%)

58,912,952 (15%)

 Symptomatic depression

40,859,184 (4.35%)

7,575,406 (3.55%)

11,154,080 (3.34%)

22,129,699 (5.65%)

Office expenditure

2323 ± 30

2433 ± 59

2228 ± 47

2344 ± 39

0.019

Outpatient expenditure

901 ± 29

853 ± 54

829 ± 36

984 ± 44

0.078

Emergency room expenditure

350 ± 9

387 ± 25

318 ± 17

357 ± 13

0.013

Inpatient expenditure

2317 ± 58

2410 ± 124

2239 ± 95

2333 ± 76

0.266

Prescription expenditure

2835 ± 39

2584 ± 56

2526 ± 36

3235 ± 72

<  0.001

Dental expenditure

382 ± 6

400 ± 11

398 ± 9

358 ± 8

<  0.001

Home healthcare expenditure

520 ± 30

862 ± 89

378 ± 23

456 ± 38

<  0.001

Other expenditure

194 ± 5

219 ± 11

197 ± 8

179 ± 5

<  0.001

Total expenditure

9447 ± 109

9743 ± 232

8760 ± 143

9871 ± 155

<  0.001