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. 2024 Apr 2;44(6):1101–1109. doi: 10.1007/s00296-024-05564-x

Table 1.

Characteristics of the pregnancies in 2000–2014 of diagnosed SLE patients and their population controls in Finland

Characteristics of pregnancies SLE n = 163 Controls n = 580 p value
Mothers, n 103 371
Cohabiting, n (%) 152 (93) 528 (91) 0.37
Primipara, n (%) 74 (45) 211 (36) 0.036
Mother’s age at delivery, mean (SD) 31.2 (4.5) 31.3 (4.7) 0.85
Time since index date, months, mean (SD) 6.2 (3.4) 5.7 (3.6) 0.091
Pre-pregnancy weight, kg, mean (SD) 65.6 (10.6) 67.2 (14.1) 0.21
Height, cm, mean (SD) 166 (6) 166 (6) 0.71
Pre-pregnancy body mass index, kg/m2, mean (SD) 23.8 (3.8) 24.4 (4.8) 0.18
 < 18.5, n (%) 2 (1) 11 (2)
18.5–24.9, n (%) 101 (69) 329 (64)
25.0–29.9, n (%) 31 (21) 116 (22)
 ≥ 30, n (%) 13 (9) 62 (12)
Smokers, n (%) 0.28
 No 140 (89) 490 (87)
 Quit during the first trimester 10 (6) 25 (4)
 Continued after the first trimester 8 (5) 46 (8)
Education level, n (%) 0.13
 Basic 67 (41) 272 (47)
 Secondary 53 (33) 183 (32)
 High 43 (26) 125 (22)

SLE systemic lupus erythematosus, n number, % percentage, SD standard deviation, index date the date of special reimbursement decision for SLE medication in patients (equal with the inclusion of controls), kg kilograms, cm centimetre, m2 square metre