Descriptive characteristics of the women for each pregnancy
| Overall | SLE | UCTD | Arthritis | Rare rheumatic diseases | P value | |
| Number of pregnancies | 265 | 88 | 33 | 100 | 44 | |
| Average age | 31.3 (5.5) | 30.0 (4.8) | 30.7 (5.3) | 32.2 (5.3)* | 32.2 (6.8) | 0.03 |
| Weeks postpartum of visit | 7.6 (4.6) | 7.5 (4.2) | 8.0 (4.2) | 7.3 (4.6) | 8.0 (5.5) | 0.8 |
| Number of people to count on for help and support (n=254) | 4.5 (1.7) | 4.6 (1.9) | 4.2 (1.5) | 4.4 (1.6) | 4.7 (1.3) | 0.5 |
| Maternal race, n (%) | ||||||
| White | 184 (69) | 41 (47) | 24 (73) | 89 (89) | 30 (68) | |
| Black | 59 (22) | 39 (44) | 4 (12)† | 7 (7)* | 9 (20)‡ | <0.0001 |
| Asian | 16 (6) | 6 (7) | 2 (6) | 4 (4) | 4 (9) | |
| Other | 6 (2) | 2 (2) | 3 (9) | 0 (0) | 1 (2) | |
| Education (n=260), n (%) | 0.2 | |||||
| <College degree | 76 (29) | 29 (35) | 11 (33) | 22 (22) | 14 (33) | |
| ≥College degree | 184 (71) | 55 (65) | 22 (67) | 78 (78) | 29 (67) | |
| Annual income (n=246), n (%) | 0.03 | |||||
| <$50 000 | 72 (29) | 30 (39) | 7 (23) | 20 (21)* | 15 (37) | |
| ≥$50 000 | 174 (71) | 47 (61) | 24 (77) | 77 (79) | 26 (63) | |
| Insurance (n=258), n (%) | 0.5 | |||||
| Medicaid, Medicare or none | 50 (19) | 18 (21) | 7 (23) | 15 (15) | 10 (23) | |
| Private or military | 208 (81) | 66 (79) | 24 (77) | 85 (85) | 33 (77) | |
| Marital status (n=258), n (%) | 0.02 | |||||
| Single, divorced or separated | 36 (14) | 18 (22) | 2 (6) | 8 (8)* | 8 (19) | |
| Married/with partner | 222 (86) | 64 (78) | 31 (94) | 92 (92) | 35 (81) | |
| Disease activity at postpartum visit (n=261), n (%) | ||||||
| Low | 196 (75) | 64 (74) | 29 (88) | 70 (70) | 33 (80) | 0.2 |
| Moderate | 59 (23) | 22 (25) | 3 (9) | 26 (26) | 9 (20) | |
| Severe | 6 (2) | 1 (1) | 1 (3) | 4 (4) | 0 (0) | |
*Indicates p value <0.05 for arthritis compared with SLE.
†Indicates p value <0.05 for UCTD compared with SLE.
‡Indicates p value <0.05 for other rare rheumatic diseases compared with SLE.
UCTD, undifferentiated connective tissue disease.