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Table 1 Comparison of clinical features: between PTB and Term delivery, between PTB + Miscarriage and Term delivery

From: Risk factors for spontaneous miscarriage above 12 weeks or premature delivery in patients undergoing cervical polypectomy during pregnancy

Clinical featurePTBPTB + MiscarriageTerm delivery
(N = 15)(N = 20)(N = 53)
Age33.2 ± 5.332.5 ± 5.234.3 ± 3.4
Nulliparity (%)40.045.050.9
Smoking (%)6.65.01.8
Previous second trimester loss (%)26.635.0**13.2
History of full-term delivery (%)50.040.057.1
Other maternal diseases (%)6.610.030.1
Uterine anomalies (%)6.615.00.8
Use of vaginal progesterone (%)000
Infertility treatment (%)13.310.018.8
History of PTB (at < 34 weeks) (%)40.033.313.8
Bleeding before polypectomy (%)73.375.0**49.0
Nugent score (points)0 (0–8)0 (0–8)0 (0–10)
GA at polypectomy (weeks)9 (5–25)9 (5–25)11 (5–29)
Polypectomy by twisting (%)80.070.0**90.5
Polyp width (mm)11.1 ± 8.8*12.5 ± 8.5**6.8 ± 3.9
Decidual polyps (%)93.3*95.0**62.2
Leukocytes in polyps (/HPF)275 ± 128280 ± 147314 ± 201
Prelabour rupture of membranes (%)26.625.011.3
h-CAM ≥ stage 2 (%)72.7*50.020.0
Funisitis (%)45.431.224.0
Offspring GA at birth (weeks)29.8 ± 4.8*25.8 ± 8.3**38.8 ± 1.2
Offspring birth weight (g)1540 ± 774*1365 ± 875**3027 ± 392
  1. Data indicate the mean ± standard deviation or median (range), PTB preterm birth, GA gestational age, HPF high power field, h-CAM histological chorioamnionitis, N/A not available, *: Significant difference between PTB and Term delivery, p <  0.05, **: Significant difference between PTB + Miscarriage and Term delivery, p <  0.05