Table 4. Comparison of E-Cervix parameters in subjects with CL ≥ 1.5 cm.
| Variables | No sPTD (n = 93) | sPTD (n = 17) | P value |
|---|---|---|---|
| Age, yr | 33.00 (31.00–35.00) | 32.00 (30.00–35.00) | 0.372 |
| Multiparity | 60 (64.5) | 8 (47.1) | 0.186 |
| Prior sPTD | 8 (8.6) | 2 (11.8) | 0.651 |
| Prepregnancy BMI, kg/m2 | 20.91 (19.36–22.70) | 19.26 (18.26–20.03) | 0.017 |
| DM | 1 (1.1) | 0 (0.0) | 1.000 |
| HTN | 0 (0.0) | 1 (5.9) | 0.155 |
| Smoking | 1 (1.1) | 0 (0.0) | 1.000 |
| GA at exam, wk | 24.43 (21.43–29.00) | 22.71 (20.29–24.00) | 0.027 |
| CL, cm | 2.12 (1.95–2.32) | 2.20 (1.84–2.38) | 0.593 |
| Funneling | 13 (14.0) | 4 (23.5) | 0.296 |
| IOS strain | 0.28 (0.22–0.37) | 0.30 (0.24–0.36) | 0.753 |
| EOS strain | 0.33 (0.26–0.39) | 0.36 (0.25–0.47) | 0.442 |
| IOS/EOS | 0.89 (0.75–1.03) | 0.85 (0.76–0.96) | 0.492 |
| Strain mean level within 0.5 cm | 0.31 (0.24–0.39) | 0.36 (0.27–0.44) | 0.284 |
| Strain mean level within 1.0 cm | 0.31 (0.24–0.38) | 0.32 (0.24–0.43) | 0.614 |
| Strain mean level within 1.5 cm | 0.33 (0.27–0.40) | 0.33 (0.27–0.42) | 0.849 |
| ECI within 0.5 cm | 5.24 (3.72–6.70)] | 7.39 (5.08–9.16) | 0.023 |
| ECI within 1.0 cm | 4.73 (3.20–5.61) | 6.26 (4.00–7.81) | 0.011 |
| ECI within 1.5 cm | 4.20 (3.00–5.04) | 5.76 (3.93–6.96) | 0.009 |
| Hardness ratio within 0.5 cm | 57.29 (44.32–72.21) | 50.14 (35.06–65.81) | 0.376 |
| Hardness ratio within 1.0 cm | 59.02 (45.28–72.06) | 56.06 (37.78–73.05) | 0.785 |
| Hardness ratio within 1.5 cm | 54.48 (41.37–66.77) | 55.84 (37.85–68.65) | 0.954 |
Data are presented as the median (interquartile range) or number (%).
P values less than 0.05 are shown in bold.
sPTD = spontaneous preterm delivery, BMI = body mass index, DM = diabetes mellitus, HTN = hypertension, GA = gestational age, CL = cervical length, IOS = internal os of cervix, EOS = external os of cervix, ECI = elasticity contrast index.