Baseline sociodemographic and cardiovascular risk factors in the Hopkins Lupus Cohort. Pearson’s chi-square used for categorical variables and t test used for continuous variables.
| Variables | White, n = 1052 | African American, n = 700 | p |
|---|---|---|---|
| Women, % | 91.7 | 93.9 | 0.06 |
| Mean age, yrs (SD) | |||
| At onset of SLE | 29.9 (13.5) | 29.4 (11.8) | 0.47 |
| At last cohort visit | 44.5 (13.7) | 43.5 (13.2) | 0.11 |
| Followup duration, mean yrs (SD) | 6.0 (5.3) | 7.4 (6.2) | < 0.001 |
| Socioeconomic markers | |||
| Income levels, $US | |||
| Mean (SD) | 71,743.08 (94,591.81) | 34,586.27 (42,424.18) | < 0.001 |
| Median (IQR) | 50,000 (58,000) | 23,000 (38,400) | |
| Income < $25,000, % | 41.2 | 16.2 | < 0.001 |
| Income $25,000–$60,000, % | 38.3 | 29.1 | |
| Income > $60,000, % | 41.2 | 16.2 | |
| Education level, yrs | |||
| Mean (SD) | 14.4 (2.8) | 13.3 (2.8) | < 0.001 |
| Median (IQR) | 14 (4) | 13 (3) | |
| Health insurance, % | 98.3 | 94.8 | < 0.001 |
| Comorbid conditions, % | |||
| Current smoking | 16.2 | 20.6 | 0.011 |
| Past smoking | 40.3 | 40.1 | 0.49 |
| Obesity | 44.2 | 58.7 | < 0.001 |
| Hypertension | 44.8 | 64.9 | < 0.001 |
| Hyperlipidemia | 57.2 | 59.1 | 0.23 |
| Diabetes mellitus | 8.1 | 14.4 | < 0.001 |
| Cardiovascular outcomes, % | |||
| Myocardial infarction | 4.5 | 5.6 | 0.17 |
| Cerebrovascular accident | 8.4 | 10.6 | 0.07 |
IQR: interquartile range (represents the 25th percentile subtracted from the 75th percentile); SLE: systemic lupus erythematosus.