Table 2

Analysis of the correlation factors of early miscarriage.

Early miscarriage rate (%)

Single-factor analysis

Multivariate -factor analysis

OR

P

OR

P

Age (years)

<35

12.0

3539

16.3

1.417

0.005

1.348

0.018

≥40

35.8

4.110

<0.001

3.883

<0.001

BMI (kg/m2)

18.523.9

13.9

15.3

1.117

0.611

1.873

0.389

2427.9

15.2

1.107

0.446

1.391

0.681

≥28

17.9

1.353

0.103

2.067

0.062

Endometrial thickness (mm)

<8.5

17.3

≥8.5

13.2

0.724

0.005

0.776

0.032

Cycle type

Fresh cycle

10.1

Frozen-thawed cycle

15.9

1.684

0.001

1.477

0.014

Embryo type

Cleavage-stage embryo

13.8

Blastocyst-stage embryo

15.6

1.073

0.206

Embryo number

1

18.3

2

14.0

0.729

0.026

0.762

0.065

No. of previous miscarriages

0

14.4

1

14.8

1.027

0.88

0.888

0.526

2

19.4

1.421

0.282

1.123

0.735

≥3

31.3

2.692

0.068

1.772

0.308