Table 1 The baseline characteristics of female asthma from NHANES(2001–2018).

From: Correlations between oxidative balance score and female asthma among U.S. adults

Variable

Total

Non-asthma

Asthma

P

OBS

19.20 (0.12)

19.35 (0.12)

18.48 (0.22)

< 0.001

Age

47.89 (0.23)

48.24 (0.25)

46.13 (0.41)

< 0.0001

Poverty

2.97 (0.03)

3.00 (0.03)

2.82 (0.05)

< 0.001

BMI (kg/m2)

28.94 (0.09)

28.63 (0.09)

30.49 (0.23)

< 0.0001

Education level n (%)

Less than high school

1693 (4.53)

1484 (4.68)

209 (3.78)

0.01

high school

6468 (32.56)

5462 (32.98)

1006 (30.51)

 

More than high school

9863 (62.90)

8207 (62.34)

1656 (65.71)

 

Race n (%)

Non-Hispanic White

8284 (70.43)

6855 (70.04)

1429 (72.32)

< 0.0001

Non-Hispanic Black

3790 (11.30)

3139 (11.21)

651 (11.77)

 

Mexican American

2839 (6.94)

2538 (7.39)

301 (4.67)

 

other

3111 (11.34)

2621 (11.36)

490 (11.24)

 

Smoke n (%)

Never

11,339 (60.45)

9777 (61.83)

1562 (53.60)

< 0.0001

Former

3513 (21.04)

2868 (20.66)

645 (22.94)

 

Now

3172 (18.51)

2508 (17.51)

664 (23.46)

 

Alcohol n (%)

Never

3604 (14.96)

3169 (15.70)

435 (11.29)

< 0.0001

Former

2990 (14.09)

2447 (13.69)

543 (16.08)

 

Mild

5164 (31.37)

4374 (31.59)

790 (30.29)

 

Moderate

3402 (22.17)

2832 (22.21)

570 (21.96)

 

Heavy

2864 (17.41)

2331 (16.81)

533 (20.38)

 

Diabetes n (%)

No

15,710 (90.58)

13,311 (91.02)

2399 (88.36)

< 0.0001

Yes

2314 (9.42)

1842 (8.98)

472 (11.64)

 

Hypertension n (%)

No

68.24 (0.01)

9794 (69.21)

1647 (63.43)

< 0.0001

Yes

31.76 (0.01)

5359 (30.79)

1224 (36.57)

 

Coronary heart disease n (%)

No

17,550 (97.72)

14,778 (97.89)

2772 (96.85)

0.02

Yes

474 (2.28)

375 (2.11)

99 (3.15)

 

Family history of asthma n (%)

No

13,704 (75.56)

12,095 (79.40)

1609 (56.46)

< 0.0001

Yes

4320 (24.44)

3058 (20.60)

1262 (43.54)

 

Age group n (%)

20–39

5829 (34.90)

4823 (34.21)

1006 (38.36)

0.002

40–59

6094 (38.41)

5104 (38.59)

990 (37.51)

 

>=60

6101 (26.69)

5226 (27.20)

875 (24.13)

 

BMI Group n (%)

Under/Normal

5637 (35.02)

4905 (36.07)

732 (29.83)

< 0.0001

Overweight

5155 (27.85)

4434 (28.48)

721 (24.74)

 

Obese

7232 (37.13)

5814 (35.46)

1418 (45.43)

 

PIR n (%)

Low

5642 (21.83)

4591 (20.89)

1051 (26.49)

< 0.0001

Middle

6870 (36.27)

5873 (36.73)

997 (34.01)

 

High

5512 (41.90)

4689 (42.38)

823 (39.50)

 
  1. RE: retinol equivalent; ATE: alpha-tocopherol equivalent; MET: metabolic equivalent; BMI: body mass index.