Table 1 Based on the baseline characteristics of the study population ascertained by NHANES from 2007 to 2014

N

21,058

5261

5268

5258

5271

Age (years)

49.70 ± 17.64

49.48 ± 19.31

50.50 ± 18.28

49.86 ± 17.08

48.95 ± 15.63

< 0.001

Sex (%)

< 0.001

Male

10,357 (49.18%)

1928 (36.65%)

2248 (42.67%)

2841 (54.03%)

3340 (63.37%)

Female

10,701 (50.82%)

3333 (63.35%)

3020 (57.33%)

2417 (45.97%)

1931 (36.63%)

Race (%)

< 0.001

Mexican American

3156 (14.99%)

561 (10.66%)

705 (13.38%)

887 (16.87%)

1003 (19.03%)

Other Hispanic

2137 (10.15%)

410 (7.79%)

517 (9.81%)

576 (10.95%)

634 (12.03%)

Non-Hispanic White

9426 (44.76%)

2341 (44.50%)

2353 (44.67%)

2316 (44.05%)

2416 (45.84%)

Non-Hispanic Black

4237 (20.12%)

1382 (26.27%)

1142 (21.68%)

975 (18.54%)

738 (14.00%)

Other Races

2102 (9.98%)

567 (10.78%)

551 (10.46%)

504 (9.59%)

480 (9.11%)

Marital status (%)

< 0.001

Married

10,891 (51.72%)

2435 (46.28%)

2642 (50.15%)

2868 (54.55%)

2946 (55.89%)

Single

8607 (40.87%)

2479 (47.12%)

2226 (42.26%)

2021 (38.44%)

1881 (35.69%)

with partner

1560 (7.41%)

347 (6.60%)

400 (7.59%)

369 (7.02%)

444 (8.42%)

Education level (%)

< 0.001

Below high school

2317 (11.00%)

424 (8.06%)

541 (10.27%)

617 (11.73%)

735 (13.94%)

High school

3195 (15.17%)

738 (14.03%)

729 (13.84%)

809 (15.39%)

919 (17.44%)

Above high school

15,546 (73.82%)

4099 (77.91%)

3998 (75.89%)

3832 (72.88%)

3617 (68.62%)

PIR (%)

< 0.001

< 1

4299 (22.31%)

1031 (21.36%)

1017 (21.13%)

1045 (21.76%)

1206 (24.99%)

1–3

7979 (41.41%)

1865 (38.64%)

1919 (39.87%)

2097 (43.66%)

2098 (43.48%)

> 3

6989 (36.27%)

1930 (39.99%)

1877 (39.00%)

1661 (34.58%)

1521 (31.52%)

BMI category (%)

< 0.001

Normal weight

6147 (29.56%)

2623 (50.37%)

1679 (32.31%)

1135 (21.85%)

710 (13.66%)

Overweight

7001 (33.66%)

1503 (28.86%)

1739 (33.46%)

1849 (35.60%)

1910 (36.74%)

Obese

7649 (36.78%)

1081 (20.76%)

1779 (34.23%)

2210 (42.55%)

2579 (49.61%)

Vigorous activity (%)

< 0.001

Yes

3799 (18.04%)

787 (14.96%)

895 (16.99%)

988 (18.79%)

1129 (21.42%)

No

17,259 (81.96%)

4474 (85.04%)

4373 (83.01%)

4270 (81.21%)

4142 (78.58%)

Moderate activity (%)

< 0.001

Yes

7279 (34.57%)

1708 (32.47%)

1755 (33.31%)

1890 (35.95%)

1926 (36.54%)

No

13,779 (65.43%)

3553 (67.53%)

3513 (66.69%)

3368 (64.05%)

3345 (63.46%)

Alcohol habit (%)

< 0.001

Yes

2865 (17.42%)

599 (14.70%)

642 (15.77%)

729 (17.82%)

895 (21.26%)

No

13,582 (82.58%)

3476 (85.30%)

3428 (84.23%)

3363 (82.18%)

3315 (78.74%)

Smoking habit (%)

< 0.001

Yes

9541 (45.31%)

2191 (41.65%)

2281 (43.30%)

2369 (45.06%)

2700 (51.22%)

No

11,517 (54.69%)

3070 (58.35%)

2987 (56.70%)

2889 (54.94%)

2571 (48.78%)

Hypertension (%)

< 0.001

Yes

7596 (36.07%)

1786 (33.95%)

1877 (35.63%)

1963 (37.33%)

1970 (37.37%)

No

13,462 (63.93%)

3475 (66.05%)

3391 (64.37%)

3295 (62.67%)

3301 (62.63%)

Diabetes (%)

0.138

Yes

2611 (12.40%)

619 (11.77%)

637 (12.09%)

660 (12.55%)

695 (13.19%)

No

18,447 (87.60%)

4642 (88.23%)

4631 (87.91%)

4598 (87.45%)

4576 (86.81%)

TC, mmol/L

5.01 ± 1.08

4.42 ± 0.89

4.76 ± 0.90

5.08 ± 0.89

5.77 ± 1.12

< 0.001

HDL-C, mmol/L

1.35 ± 0.41

1.77 ± 0.42

1.43 ± 0.28

1.22 ± 0.22

0.99 ± 0.20

< 0.001

NHHR

3.00 ± 1.47

1.53 ± 0.32

2.34 ± 0.21

3.18 ± 0.28

4.95 ± 1.41

< 0.001

Nephrolithiasis (%)

< 0.001

Yes

1906 (9.05%)

369 (7.01%)

459 (8.71%)

525 (9.98%)

553 (10.49%)

No

19,152 (90.95%)

4892 (92.99%)

4809 (91.29%)

4733 (90.02%)

4718 (89.51%)

Nephrolithiasis recurrence (%)

0.009

Yes

642 (3.05%)

101 (1.92%)

154 (2.92%)

176 (3.35%)

211 (4.00%)

No

20,416 (96.95%)

5160 (98.08%)

5114 (97.08%)

5082 (96.65%)

5060 (96.00%)