Table 1 Descriptions of study individuals’ characteristics.

From: Relationship between weight-adjusted waist index (WWI) and osteoarthritis: a cross-sectional study using NHANES data

Variables

Total (n = 12696)

Q1 (n = 3174)

Q2 (n = 3174)

Q3 (n = 3173)

Q4 (n = 3175)

P

Gender, n (%)

     

0.341

Female

6490 (51.12%)

1614 (50.85%)

1597 (50.32%)

1665 (52.47%)

1614 (50.83%)

 

Male

6206 (48.88%)

1560 (49.15%)

1577 (49.68%)

1508 (47.53%)

1561 (49.17%)

 

Age, n (%)

     

0.177

20–40 years

5052 (39.79%)

1246 (39.26%)

1276 (40.20%)

1284 (40.47%)

1246 (39.24%)

 

40–60 years

4248 (33.46%)

1102 (34.72%)

1004 (31.63%)

1048 (33.03%)

1094 (34.46%)

 

60–80 years

2840 (22.37%)

691 (21.77%)

755 (23.79%)

710 (22.38%)

684 (21.54%)

 

80 + years

556 (4.38%)

135 (4.25%)

139 (4.38%)

131 (4.13%)

151 (4.76%)

 

Race, n (%)

     

0.007

Mexican American

2123 (16.72%)

533 (16.79%)

561 (17.67%)

486 (15.32%)

543 (17.10%)

 

Non-Hispanic Black

2508 (19.75%)

632 (19.91%)

629 (19.82%)

621 (19.57%)

626 (19.72%)

 

Non-Hispanic White

6009 (47.33%)

1479 (46.60%)

1484 (46.75%)

1503 (47.37%)

1543 (48.60%)

 

Other Hispanic

1127 (8.88%)

290 (9.14%)

301 (9.48%)

289 (9.11%)

247 (7.78%)

 

Other Race

929 (7.32%)

240 (7.56%)

199 (6.27%)

274 (8.64%)

216 (6.80%)

 

PIR, n (%)

     

0.853

High income (2 to < 3)

1815 (14.30%)

436 (13.74%)

458 (14.43%)

465 (14.65%)

456 (14.36%)

 

Higher income (3 or greater)

5049 (39.77%)

1268 (39.95%)

1253 (39.48%)

1279 (40.31%)

1249 (39.34%)

 

Low income (< 1)

2542 (20.02%)

619 (19.50%)

657 (20.70%)

619 (19.51%)

647 (20.38%)

 

Normal (1 to < 2)

3290 (25.91%)

851 (26.81%)

806 (25.39%)

810 (25.53%)

823 (25.92%)

 

Alcohol, n (%)

     

0.533

No

11,343 (89.34%)

2856 (89.98%)

2836 (89.35%)

2820 (88.87%)

2831 (89.17%)

 

Yes

1353 (10.66%)

318 (10.02%)

338 (10.65%)

353 (11.13%)

344 (10.83%)

 

Level, n (%)

     

0.028

Both moderate and vigorous

2689 (21.18%)

634 (19.97%)

657 (20.70%)

675 (21.27%)

723 (22.77%)

 

Inactive

6177 (48.65%)

1508 (47.51%)

1549 (48.80%)

1568 (49.42%)

1552 (48.88%)

 

Moderate

3159 (24.88%)

844 (26.59%)

807 (25.43%)

766 (24.14%)

742 (23.37%)

 

Vigorous

671 (5.29%)

188 (5.92%)

161 (5.07%)

164 (5.17%)

158 (4.98%)

 

BMI, n (%)

     

< 0.001

Normal (18.5 to < 25)

3991 (31.44%)

846 (26.65%)

973 (30.66%)

1073 (33.82%)

1099 (34.61%)

 

Obese (30 or greater)

4820 (37.96%)

1303 (41.05%)

1177 (37.08%)

1170 (36.87%)

1170 (36.85%)

 

Overweight (25 to < 30)

3765 (29.66%)

990 (31.19%)

997 (31.41%)

907 (28.58%)

871 (27.43%)

 

Underweight(< 18.5)

120 (0.95%)

35 (1.10%)

27 (0.85%)

23 (0.72%)

35 (1.10)%

 

Edu, n (%)

     

< 0.001

< High school

1541 (12.14%)

144 (4.54%)

286 (9.01%)

442 (13.93%)

669 (21.07%)

 

> High school

9159 (72.14%)

2592 (81.66%)

2427 (76.47%)

2210 (69.65%)

1930 (60.79%)

 

Completed high school

1996 (15.72%)

438 (13.80%)

461 (14.52%)

521 (16.42%)

576 (18.14%)

 

Marital, n (%)

     

< 0.001

Married/living with partner

7864 (61.97%)

1795 (56.59%)

2089 (65.82%)

2085 (65.73%)

1895 (59.72%)

 

Widowed/divorced/separated/never married

4827 (38.03%)

1377 (43.41%)

1085 (34.18%)

1087 (34.27%)

1278 (40.28%)

 

Smoke, n (%)

     

< 0.001

Current

2763 (21.76%)

856 (26.97%)

733 (23.09%)

635 (20.01%)

539 (16.98%)

 

Former

3018 (23.77%)

513 (16.16%)

704 (22.18%)

851 (26.82%)

950 (29.92%)

 

Never

6915 (54.47%)

1805 (56.87%)

1737 (54.73%)

1687 (53.17%)

1686 (53.10%)

 

Hypertension, n (%)

     

< 0.001

Yes

4017 (31.64%)

944 (29.74%)

947 (29.84%)

1027 (32.37%)

1099 (34.61%)

 

No

8679 (68.36%)

2230 (70.26%)

2227 (70.16%)

2146 (67.63%)

2076 (65.39%)

 

Failing kidneys, n (%)

     

0.002

Yes

297 (2.34%)

63 (1.98%)

57 (1.80%)

77 (2.43%)

100 (3.15%)

 

No

12,399 (97.66%)

3111 (98.02%)

3117 (98.20%)

3096 (97.57%)

3075 (96.85%)

 

OP, n (%)

     

0.002

Yes

549 (4.32%)

130 (4.10%)

105 (3.31%)

159 (5.01%)

155 (4.88%)

 

No

12,147 (95.68%)

3044 (95.90%)

3069 (96.69%)

3014 (94.99%)

3020 (95.12%)

 

Sleep disorder, n (%)

     

< 0.001

No

10,958 (86.31%)

2817 (88.75%)

2787 (87.81%)

2722 (85.79%)

2632 (82.90%)

 

Yes

1738 (13.69%)

357 (11.25%)

387 (12.19%)

451 (14.21%)

543 (17.10%)

 

Diabetes, n (%)

     

< 0.001

No

10,809 (85.14%)

3052 (96.16%)

2886 (90.93%)

2647 (83.42%)

2224 (70.05%)

 

Yes

1887 (14.86%)

122 (3.84%)

288 (9.07%)

526 (16.58%)

951 (29.95%)

 

OA status, n (%)

     

< 0.001

No

12,095 (95.27%)

3109 (97.95%)

3040 (95.78%)

3007 (94.77%)

2939 (92.57%)

 

Yes

601 (4.73%)

65 (2.05%)

134 (4.22%)

166 (5.23%)

236 (7.43%)

 
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