Skip to main content

Table 1 Baseline characteristics of adults included in the final analysis according SII quartiles

From: Systemic immunity-inflammation index is associated with body fat distribution among U.S. adults: evidence from national health and nutrition examination survey 2011–2018

Total

Total

Q1

Q2

Q3

Q4

P value

Age [year]

38.46(0.26)

37.82(0.41)

37.83(0.39)

38.86(0.34)

39.25(0.44)

0.002

Sex

     

< 0.0001

 Male

5603(50.06)

1652(59.56)

1452(53.62)

1365(49.42)

1134(41.44)

 

 Female

5589(49.94)

1146(40.44)

1346(46.38)

1437(50.58)

1660(58.56)

 

Race

     

< 0.0001

 Mexican American

1735(15.5)

372(10.09)

454(11.12)

443(10.35)

466(11.17)

 

 Non-Hispanic Black

2308(20.62)

926(19.40)

537(10.11)

422( 7.61)

423( 7.79)

 

 Non-Hispanic White

3830(34.22)

693(52.77)

963(61.30)

1064(64.48)

1110(64.89)

 

 Other Hispanic

1185(10.59)

237(6.70)

296(7.58)

336(8.00)

316(7.71)

 

 Other Race

2134(19.07)

570(11.04)

548( 9.89)

537( 9.56)

479( 8.45)

 

Education level

     

0.004

 Under high school

657(5.87)

164(4.16)

193(4.24)

164(3.83)

136(3.13)

 

 High school or equivalent

4096(36.6)

1043(33.17)

970(29.08)

1009(32.69)

1074(34.94)

 

 Above high school

6437(57.52)

1590(62.67)

1635(66.68)

1629(63.48)

1583(61.93)

 

PIR

     

0.27

 < 1.30

3815(34.11)

888(22.86)

980(25.35)

938(23.29)

1009(26.88)

 

 1.30–3.49

3992(35.69)

1014(35.33)

1019(34.26)

999(34.47)

960(33.39)

 

 >  = 3.50

3377(30.19)

892(41.81)

798(40.39)

865(42.24)

822(39.74)

 

Smoke status

     

0.01

 Never smoker

6850(62.55)

1740(61.19)

1756(61.48)

1736(60.24)

1618(57.21)

 

 Former smoker

1747(15.95)

416(18.80)

462(20.28)

415(17.96)

454(18.92)

 

 Now smoker

2354(21.5)

563(20.01)

517(18.24)

606(21.80)

668(23.88)

 

Alcohol status

     

0.03

 Never alcohol user

1592(15.53)

433(12.01)

396(10.68)

375(10.12)

388(11.18)

 

 Former alcohol user

896(8.74)

208(7.34)

215(6.93)

229(8.86)

244(9.25)

 

 Mild alcohol user

3263(31.83)

875(35.09)

836(35.35)

793(32.09)

759(31.27)

 

 Moderate alcohol user

1855(18.09)

418(18.67)

469(21.02)

489(21.66)

479(19.39)

 

 Heavy alcohol user

2646(25.81)

640(26.90)

643(26.03)

666(27.28)

697(28.91)

 

Physical activity level

     

< 0.0001

 NMVPA (0 MET-mins/week)

2069(18.49)

640(26.90)

643(26.03)

666(27.28)

697(28.91)

 

 LMVPA (1–599 MET-mins/week)

1375(12.29)

303(10.06)

347(11.00)

348(11.74)

377(13.89)

 

 MMVPA (600–1199 MET-mins/week)

1168(10.44)

276( 9.15)

286( 9.29)

297(10.22)

309(11.80)

 

 HMVPA (≥ 1200 MET-mins/week)

6580(58.79)

1750(66.75)

1669(64.57)

1637(61.29)

1524(54.44)

 

BMI

     

< 0.0001

 Normal

3743(33.44)

1091(38.31)

975(34.59)

842(28.22)

835(29.35)

 

 Overweight

3504(31.31)

905(33.29)

916(34.82)

898(32.78)

785(29.16)

 

 Obese

3945(35.25)

802(28.40)

907(30.60)

1062(39.00)

1174(41.49)

 

WC

96.88(0.32)

93.87(0.47)

95.38(0.47)

98.52(0.47)

99.31(0.44)

< 0.0001

Muscle Quality

     

< 0.001

 Extremely low

1319(12.81)

285(22.47)

299(22.24)

320(25.19)

415(30.50)

 

 Low

1187(9.62)

272(18.16)

275(17.85)

316(20.26)

324(19.48)

 

 Normal

3246(28.22)

831(59.37)

872(59.91)

783(54.55)

760(50.02)

 

Insulin resistance

     

< 0.0001

 Yes

5512(47.33)

1172(39.83)

1354(45.64)

1457(50.54)

1529(52.23)

 

 No

5680(52.67)

1626(60.17)

1444(54.36)

1345(49.46)

1265(47.77)

 

DM

     

0.001

 Yes

1059(9.46)

231(6.43)

247(6.30)

268(7.90)

313(9.02)

 

 No

10,133(90.54)

2567(93.57)

2551(93.70)

2534(92.10)

2481(90.98)

 

Hypertension

     

0.001

 Yes

2927(26.15)

681(23.12)

682(23.39)

759(26.28)

805(29.36)

 

 No

8265(73.85)

2117(76.88)

2116(76.61)

2043(73.72)

1989(70.64)

 

Hyperlipidemia

     

< 0.0001

 Yes

6756(60.36)

1540(55.81)

1683(59.55)

1750(63.47)

1783(63.82)

 

 No

4436(39.64)

1258(44.19)

1115(40.45)

1052(36.53)

1011(36.18)

 

NAFLD

     

< 0.0001

 Yes

3746(33.47)

792(27.12)

895(29.29)

1034(33.89)

1025(35.63)

 

 No

7446(66.53)

2006(72.88)

1903(70.71)

1768(66.11)

1769(64.37)

 

ALT [U/L]

25.76(0.24)

26.21(0.59)

26.25(0.44)

26.03(0.51)

24.65(0.40)

0.02

AST [U/L]

25.05(0.19)

25.97(0.47)

25.15(0.40)

24.74(0.34)

24.48(0.46)

0.20

Creatinine [mg/dl]

0.86(0.00)

0.87(0.01)

0.86(0.01)

0.85(0.01)

0.84(0.01)

< 0.001

Uric acid [umol/L]

316.31(1.25)

316.95(2.58)

317.07(1.96)

317.96(2.26)

313.38(1.74)

0.21

Total percentage fat [%]

32.70(0.15)

30.20(0.24)

31.80(0.23)

33.58(0.23)

34.83(0.21)

< 0.0001

Android percentage fat [%]

34.71(0.18)

32.11(0.26)

33.82(0.26)

35.80(0.26)

36.72(0.25)

< 0.0001

Gynoid percentage fat [%]

35.30(0.13)

33.07(0.25)

34.51(0.21)

36.01(0.24)

37.27(0.20)

< 0.0001

Total abdominal fat area [cm2]

432.44(4.14)

377.17(5.58)

408.14(5.71)

455.29(6.17)

480.84(5.71)

< 0.0001

Subcutaneous fat area [cm2]

331.31(3.26)

287.88(4.52)

312.77(4.45)

348.42(5.11)

369.64(4.45)

< 0.0001

Visceral adipose tissue area [cm2]

101.13(1.14)

89.29(1.52)

95.37(1.54)

106.87(1.68)

111.20(1.89)

< 0.0001

V/S ratio

0.34 (0.00)

0.36(0.00)

0.34(0.00)

0.34(0.00)

0.33(0.00)

< 0.001

  1. V/S ratio visceral to subcutaneous adipose area ratio, DM Diabetes mellitus, WC Waist circumference, PIR Income level, NAFLD, Nonalcoholic fatty liver disease
  2. (Mean or proportion)