Table 1.
Baseline characteristics of NHANES participants (1999–2018) by stroke for OBS.
| Characteristics | N (%) | No history of stroke | History of stroke |
|---|---|---|---|
| All participants | 20,680 (100.00) | 19,912 (96.3) | 768 (3.7) |
| Categorical variables | |||
| Age (years) | |||
| <60 | 13,517 (65.4) | 13,317 (98.5) | 200 (1.5) |
| ≥60 | 7,163 (34.6) | 6,595 (92.1) | 568 (7.9) |
| Gender | |||
| Male | 10,228 (49.5) | 9,848 (96.3) | 380 (3.7) |
| Female | 10,452 (50.5) | 10,064 (96.3 | 388 (3.7) |
| Race | |||
| Non-Hispanic White | 9,263 (44.8 | 8,872 (95.8) | 391 (4.2) |
| Non-Hispanic Black | 4,106 (19.8) | 3,907 (95.2) | 199 (4.8) |
| Mexican American | 3,611 (17.5) | 3,522 (97.5 | 89 (2.5) |
| Other race | 3,700 (17.9) | 3,611 (97.6) | 89 (2.4) |
| BMI (kg/m2) | |||
| <25 | 6,306 (30.5) | 6,116 (97.0) | 190 (3.0) |
| 25–30 | 6,988 (33.8) | 6,745 (96.5) | 243 (3.5) |
| ≥30 | 7,386 (35.7) | 7,051 (95.5) | 335 (4.5) |
| Smoke | |||
| Never | 11,154 (53.9) | 10,859 (97.4) | 295 (2.6) |
| Former | 5,219 (25.3) | 4,930 (94.5 | 289 (5.5) |
| Now | 4,307 (20.8) | 4,123 (95.7) | 184 (4.3) |
| Hypertension | |||
| Yes | 8,774 (42.4) | 8,168 (93.1) | 606 (6.9) |
| No | 11,906 (57.6) | 11,744 (98.6) | 162 (1.4) |
| Diabetes | |||
| DM | 2,594 (12.5) | 2,360 (91.0) | 234 (9.0) |
| No | 18,086 (87.5) | 17,552 (97.0) | 534 (3.0) |
| CKD | |||
| Yes | 3,646 (17.6) | 3,292 (90.3) | 354 (9.7) |
| No | 17,034 (82.4) | 16,620 (97.6) | 414 (2.4) |
| OBS group | |||
| Q1 | 5,485 (26.5) | 5,204 (94.9) | 281 (5.1) |
| Q2 | 4,980 (24.1) | 4,766 (95.7) | 214 (4.3) |
| Q3 | 5,764 (27.9) | 5,581 (96.8) | 183 (3.2) |
| Q4 | 4,451 (21.5) | 4,361 (98.0) | 90 (2.0) |
| Continuous variables | |||
| Serum cholesterol | 4.94 ± 1.37 | 4.94 ± 1.35 | 4.71 ± 1.51 |
| Serum LDL-cholesterol | 113 ± 47 | 113 ± 46 | 104 ± 53 |
| Serum triglycerides | 1.17 ± 0.89 | 1.16 ± 0.89 | 1.30 ± 0.89 |
| Serum bilirubin | 11.97 ± 5.13 | 11.97 ± 5.13 | 10.3 ± 5.13 |
| Serum creatinine | 73.37 ± 26.52 | 72.49 ± 26.52 | 87.52 ± 36.24 |
| Serum globulin | 29 ± 6 | 29 ± 6 | 30 ± 6 |
| Serum iron | 15.2 ± 8 | 15.2 ± 8.1 | 13.8 ± 7 |
| Serum glucose | 5.22 ± 0.94 | 5.22 ± 0.89 | 5.55 ± 1.39 |
NHANES, the National Health and Nutrition Examination Survey; OBS: oxidative balance score; CKD, chronic kidney disease;.
Categorical variables were showed by count (percentage), while continuous variables were displayed by median ± interquartile range (IQR).