Comparison between patients with SLE and without SLE
| Without SLE n=533 | With SLE n=7 | P value | |
| Age at the time of inclusion | 29.2±7.1 | 26±4.2 | 0.11 |
| Gestational age at the time of questionnaire survey | 24.2±7.9 | 23.2±7.7 | 0.37 |
| Previous pregnancies | 2.5±1.5 | 1.4±0.5 | 0.075 |
| History of autoimmune diseases other than SLE (%) | 50 (9.4) | 2 (28.6) | 0.08 |
| Total of positive responses | N (%) | N (%) | P value |
| Have you ever suffered from arthritis or joint swelling for more than 3 months? | 16 (3) | 4 (57) | <0.0001 |
| Have your fingers turned pale, purple/blue or numb in the cold? | 80 (15) | 5 (71) | <0.0001 |
| Have you ever had sores in your mouth for more than 2 weeks? | 19 (3) | 3 (43) | <0.0001 |
| Have you been diagnosed with low blood cell count (anaemia, low white cell count or low platelet count)? | 53 (10) | 4 (57) | <0.0001 |
| Have you ever had a prominent rash (red skin) on your cheeks for more than a month? | 18 (3.4) | 5 (71) | <0.0001 |
| Does your skin become excessively red, more than expected, after being out in the sun? | 40 (7) | 4 (57) | <0.0001 |
| Have you ever had pain when you breathe deeply for several days? | 21 (4) | 3 (43) | <0.0001 |
| Have you been told that you ‘release’ protein in your urine? | 58 (11) | 6 (86) | <0.0001 |
| Have you ever had rapid and abundant loss of hair? | 130 (24) | 5 (71) | 0.004 |
| Have you ever had seizures or crisis? | 24 (5) | 1 (14) | 0.22 |