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Table 1 Serum progesterone and maternal characteristics at baseline, for low risk and high risk women with threatened miscarriage

From: Serum progesterone distribution in normal pregnancies compared to pregnancies complicated by threatened miscarriage from 5 to 13 weeks gestation: a prospective cohort study

Variable Normal Pregnancy [NP] Cohort (n=450) Threatened Miscarriage [TM] Cohort (n=479) p-value
Demographics
 Maternal Age (yr) 30.9 (4.0)a 30.6 (4.5) 0.058
 Gestational Age (wk) 8.4 (2.1) 7.3 (1.4) <0.0001
 Body mass index 22.9 (4.2) 23.1 (4.6) 0.459
 Previous Miscarriage (%) 18.7 23.0 0.107
 Diabetes mellitus (%) 0.21 0.23 1.000
 Smoking (%) 2.93 4.59 0.322
Outcome measures
 Serum Progesterone (nmol/L) 71.8 (27.2) 53.6 (25.2) <0.0001
 Miscarriage rate (%) 5.4 21.5 <0.0001
  1. aMean (SD)