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Table 1 Characteristics of participants in the NHANES 2003–2006 and 2009–2014 cycles

From: Association between body roundness index and psoriasis among US adults: a nationwide population-based study

Characteristic

Participants a

Total

(N = 8479)

Without Psoriasis

(N = 8245)

With Psoriasis

(N = 234)

P value

Age, mean ± SD

46.0 ± 16.9

45.9 ± 17.0

49.7 ± 16.0

< 0.001

Gender, N (%)

   

0.813

 Male

4112(48.5)

4000(49.1)

112(48.2)

 

 Female

4367(51.5)

4245(50.9)

122(51.8)

 

Year cycle

   

0.459

 2003–2004

1091(12.9)

1060(15.5)

31(18.4)

 

 2005–2006

1277(15.1)

1241(16.9)

36(20.4)

 

 2009–2010

2159(25.5)

2099(21.2)

60(19.5)

 

 2011–2012

1882(22.2)

1824(22.8)

58(24.1)

 

 2013–2014

2070(24.4)

2021(23.6)

49(17.6)

 

Race and ethnicity b, N (%)

   

< 0.001

 Mexican American

1988(23.4)

1951(13.2)

37(7.2)

 

 Non-Hispanic Black

4011(47.3)

3863(70.1)

148(82.4)

 

 Non-Hispanic White

1703(20.1)

1671(10.4)

32(6.5)

 

 Other

777(9.2)

760(6.3)

17(3.9)

 

Educational level, N (%)

   

0.251

 High school or less

1945(22.9)

1898(15.9)

47(14.4)

 

 Some college

1880(22.2)

1830(22.2)

50(17.9)

 

 College graduate or higher

4654(54.9)

4517(62.0)

137(67.8)

 

Marital status, N (%)

   

0.781

 Married

4455(52.5)

4329(57.0)

126(56.7)

 

 Never married

1645(19.4)

1613(18.3)

32(16.6)

 

 Living with partner

756(8.9)

736(8.2)

20(7.4)

 

 Others c

1623(19.1)

1567(16.4)

56(19.3)

 

Family PIR, N (%)

   

0.431

 < 1.3

2637(31.1)

2562(21.1)

75(20.1)

 

 1.3 to < 3.5

3091(36.5)

3025(35.6)

66(31.8)

 

 ≥ 3.5

2751(32.4)

2658(43.3)

93(48.1)

 

Smoking status, N (%)

   

0.025

 No

4703(55.5)

4592(55.0)

111(46.3)

 

 Yes

3776(44.5)

3653(45.0)

123(53.7)

 

Alcohol drinking, N (%)

   

0.447

 No

2259(26.6)

2205(21.7)

54(18.8)

 

 Yes

6220(73.4)

6040(78.3)

180(81.2)

 

Hypertension, N (%)

   

< 0.001

 No

5333(62.9)

5218(66.1)

115(49.3)

 

 Yes

3146(37.1)

3027(33.9)

119(50.7)

 

Diabetes, N (%)

   

0.956

 No

7440(87.7)

7239(90.7)

201(90.8)

 

 Yes

1039(12.3)

1006(9.3)

33(9.2)

 

CVD, N (%)

   

0.027

 No

8216(96.9)

7998(97.3)

218(94.7)

 

 Yes

263(3.1)

247(2.7)

16(5.3)

 

TG (mmol/L), mean ± SD

121.5 ± 67.6

121.2 ± 67.5

129.7 ± 69.5

0.057

LDL (mmol/L), mean ± SD

114.3 ± 35.3

114.3 ± 35.5

115.5 ± 35.6

0.611

BRI, mean ± SD

5.3 ± 2.3

5.3 ± 2.3

6.0 ± 2.6

< 0.001

  1. Abbreviations SD: standard deviation; PIR: poverty impact ratio; CVD: cardiovascular disease; TG: triglyceride; LDL: low-density lipoprotein; BRI: body roundness index
  2. a Data are presented as unweighted number (weighted percentage) unless otherwise specified
  3. b Race and ethnicity were self-reported
  4. c Included widowed, divorced, or separated