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Table 1 Demographic data and clinical characteristics of the study population

From: Phosphodiesterase 8B gene polymorphism in women with recurrent miscarriage: A retrospective case control study

  Cases (n = 188) Controls (n = 391) p-value
Age, years 30.1 ± 5.8 30.1 ± 5.8 0.989
BMI, kg/m2 24.7 ± 4.8 23.9 ± 4.0 0.031
Smokers, n (%) 34 (18.1%) 42 (10.7%) 0.015
Hypothyroidism, n (%) 16 (8.5%) 12 (3.1%) 0.006
  1. Values are mean ± standard deviation; n, numbers of women; BMI, body mass index: BMI at inclusion (cases), BMI at first antenatal visit (controls); Smokers: smoker during ≥1 pregnancy ending with miscarriage (cases), smoker at first visit to the prenatal center in gestational week 10 (controls); Hypothyroidism: elevated serum TSH-levels according to local laboratory limits.