Characteristics of pregnancies among women with SLE and women from the general population.
| Pregnancies in Women With SLE, n = 695 | Pregnancies in Women From the General Population, n = 4644 | |
|---|---|---|
| Maternal age at delivery, yrs, mean ± SD | 31.6 (4.7) | 31.9 (5.0) |
| Maternal age at delivery in categories, yrs, n (%) | ||
| < 35 | 490 (70.5) | 3,211 (69.1) |
| ≥ 35 | 205 (29.5) | 1,433 (30.9) |
| Duration of pregnancy, weeks, mean ± SD | 38.1 (2.9) | 39.4 (1.8) |
| Cesarean section, n (%) | 216 (31.1) | 841 (18.1) |
| BMIa, mean ± SD | 24.2 (4.2) | 24.6 (4.5) |
| Obesity at first prenatal visita, n (%) | 70 (11.2) | 491 (11.4) |
| Missing data on BMI, n (%) | 69 (9.9) | 317 (6.8) |
| Parity, n (%) | ||
| 1 | 325 (46.7) | 1855 (39.9) |
| 2 | 254 (36.6) | 1813 (39.1) |
| 3 | 79 (11.4) | 700 (15.1) |
| ≥ 4 | 37 (5.3) | 276 (5.9) |
| Year of delivery, n (%) | ||
| 2006–2008 | 96 (13.8) | 911 (19.6) |
| 2009–2011 | 219 (31.5) | 1,441 (31.0) |
| 2012–2014 | 216 (31.1) | 1,421 (30.6) |
| 2015–2016 | 164 (23.6) | 871 (18.8) |
↵aMean or percentage excludes missing values. SLE: systematic lupus erythematosus.