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Table 1 Baseline characteristics of the cases and their matched controls

From: Increased incidence of pregnancy complications in women who later develop scleroderma: a case control study

Characteristic Cases n= 103 Controls n= 103 Mean Difference (95% CI*) or P-value
Age (mean) years 57.7 57.2 0.5 (-3.6; 2.7)
Mean age at first pregnancy 25.6 26.1 -0.5 (-1.0; 1.9)
Mean age at diagnosis (SSc**) 53.0# NA NA
Body Mass Index during first pregnancy 22.2 22.7 -0.5 (-1.4; 0.3)
Sex of children Male 30% (31) 19.4% (20) 0.1
  Female 16.5% (17) 22.3% (23) 0.4
  Both 47.5% (49) 57.3% (59) 0.2
Number of pregnancies Mean 2.46 2.41 0.1 (-0.3; 0.2)
  Primipara 13.6% (14) 13.6% (14) 1.0
  Multipara 86.4% (89) 86.4% (89) 1.0
Smoking during pregnancy (% yes) 18% (18.5) 22% (23) 0.5
  1. *CI, confidence interval; **SSc, systemic sclerosis; #n = 61 (59.2%), data not complete for all cases