Table 1 Basic characteristics of participants (n = 5,676) in the NHANES 2007–2016.

From: Association between systemic immune inflammation index and adolescent obesity in a cross-sectional analysis

Variable

Total

(n = 5676)

Obesity

(n = 2335)

Non-obesity

(n = 3441)

p Value

Age(years)

15.43 ± 0.04

15.33 ± 0.06

15.50 ± 0.06

p = 0.088

SII

465.87 ± 5.58

515.25 ± 9.61

433.79 ± 6.43

p < 0.001

Log SII

6.00 ± 0.01

6.12 ± 0.02

5.93 ± 0.01

p < 0.001

WBC

6.94 ± 0.05

7.51 ± 0.08

6.57 ± 0.06

p < 0.001

PIR

2.51 ± 0.06

2.29 ± 0.06

2.65 ± 0.07

p < 0.001

BMI

24.00 ± 0.13

29.62 ± 0.16

20.36 ± 0.06

p < 0.001

Sedentary time

466.56 ± 4.59

476.04 ± 5.63

461.59 ± 5.45

p = 0.003

race (%)

   

p < 0.001

Mexican American

14.35%

17.53%

12.29%

 

Non-Hispanic Black

13.92%

15.69%

12.77%

 

Non-Hispanic White

56.30%

51.51%

59.40%

 

Other Hispanic

7.25%

7.58%

7.03%

 

Other Race

8.18%

7.69%

8.50%

 

gender (%)

   

p = 0.685

male

52.03%

51.54%

52.34%

 

female

47.97%

48.46%

47.66%

 

activity (%)

   

p = 0.023

active

79.54%

77.76%

80.70%

 

inactive

20.46%

22.24%

19.30%

 

Hyperlipemia (%)

   

p < 0.001

hyperlipemia

8.75%

14.89%

4.76%

 

Non-hyperlipemia

91.25%

85.11%

95.24%

 
  1. Mean ± SE for continuous variables. SII, systemic immune-inflammation index; WBC white blood cell, PIR family poverty ratio, BMI body mass index, NHANES national health and nutrition examination survey. p < 0.05 was considered statistically significant.