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Table 2 Prediction of early preterm delivery in women who had undergone cerclage for cervical shortening. Results of the univariate and multivariate analysis

From: The predictive value of sequential cervical length screening in singleton pregnancies after cerclage: a retrospective cohort study

   

Univariate analysis

Multivariate analysis

 

Delivery <35 week (n = 19)

Delivery ≥35 week (n = 37)

OR (95 % CI)a

P

P

Adjusted OR (95 % CI) a

P

P

(Wald’s test)

(LR test)b

(Wald’s test)

(LR test)b

Age (years)c

33 (27;38)

31 (29;36)

1.01 (0.92,1.12)

0.758

0.757

-

-

-

Body mass index (kg/m2)c

24.8  (21.0; 30.4)

23.2 (20.2;27.2)

1.09 (0.96,1.23)

0.189

0.183

-

-

-

Previous preterm deliveryd

7 (36.8)

22 (59.5)

0.4 (0.13,1.24)

0.113

0.107

-

-

-

Previous second trimester miscarriaged

13 (68.4)

20 (54.1)

1.84 (0.58,5.9)

0.304

0.297

-

-

-

Previous conizationd

3 (15.8)

9 (24.3)

0.33 (0.09,1.21)

0.094

0.072

-

-

-

Pregnancy after IVF treatmentd

3 (15.8)

2 (5.4)

3.28 (0.5,21.6)

0.217

0.211

-

-

-

Urinary tract infection during pregnancyd

0 (0)

1 (2.7)

0 (0,Inf)

0.992

0.360

-

-

-

Parityc

0

8 (42.1)

4 (10.8)

reference

reference

0.292

-

-

-

 

1

6 (31.6)

15 (40.5)

0.33 (0.02;5.03)

0.427

-

-

-

 

≥2

5 (26.3)

18 (48.6)

0 (0;inf)

0.996

-

-

-

Cigarette smokingd

3 (15.8)

7 (18.9)

0.8 (0.18,3.54)

0.772

0.770

-

-

-

Gestational age at cerclagec

16 (16;18)

16 (16;18)

1.14 (0.66,1.96)

0.634

0.633

-

-

-

CLe before cerclage (mm)c

17 (14;20)

23 (17;24)

0.89 (0.8,0.99)

0.036 f

0.028 f

0.98 (0.86,1.13)

0.808

0.809

CLe after cerclage (mm)c

14 (9;19)

27 (22;32)

0.82 (0.74,0.91)

<0.001 f

<0.001 f

0.85 (0.73,0.99)

0.041

0.024 f

Decrease in CLe after cerclaged

13 (68.4)

7 (18.9)

9.29 (2.61,33.06)

<0.001 f

<0.001 f

Not included due to redundancy

CLe at the 20 gestational week (mm)c

16 (10;23)

24 (21;31)

0.84 (0.76,0.93)

0.001

<0.001 f

0.98 (0.82,1.16)

0.803

0.803

CLe at the 22 gestational week (mm)c

15 (5;23)

20 (16;29)

0.89 (0.83;0.97)

0.007

0.002 f

0.97 (0.87,1.08)

0.595

0.593

  1. a OR (95 % CI) = odds ratio (95 % confidence interval), b LR test = likelihood ratio test, c Continuous variable, provided in median (interquartile range); d nominal variable, provided in n (%); e CL = cervical length; f Italic letters indicate statistical significance; g despite its significant predictive value in the univariate analysis, the parameter “cervical length before cerclage” was not included in the multivariate model due to its co-linear association with the parameter “cervical length after cerclage” that was more predictive in the univariate analysis
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BMC Pregnancy and Childbirth

ISSN: 1471-2393

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