Table 3 Univariate and multivariate logistic regression analyses of live birth after single vitrified-warmed blastocyst transfer

Odds ratio

95% CI

P-value

AUC

Adjusted odds ratio

95% CI

P-value

AUC

Female age (years)

0.876

0.861–0.982

 < 0.0001

0.642

0.888

0.868–0.909

 < 0.0001

0.711

Male age (years)

0.939

0.92–0.952

 < 0.0001

0.592

0.996

0.979–1.013

0.6814

Body mass index

0.970

0.947–0.993

0.0128

0.523

0.988

0.979–1.013

0.3616

Culture time to the expanded blastocyst stage

0.962

0.956–0.967

 < 0.0001

0.621

0.975

0.968–0.982

 < 0.0001

Blastocyst diameter

1.008

1.005–1.011

 < 0.0001

0.561

1.007

1.004–1.011

 < 0.0001

Gardner’s criteria

ICM

Grade A

Reference

-

-

0.615

Reference

-

-

Grade B

0.729

0.625–0.850

 < 0.0001

1.097

0.919–1.309

0.3015

Grade C

0.315

0.264–0.376

 < 0.0001

0.746

0.591–0.941

0.0135

TE

Grade A

Reference

-

-

0.640

Reference

-

-

Grade B

0.586

0.497–0.691

 < 0.0001

0.702

0.585–0.843

0.0002

Grade C

0.273

0.231–0.322

 < 0.0001

0.492

0.394–0.615

 < 0.0001

Endometrial preparation

Natural

Reference

-

-

Reference

-

-

Letrozole

1.144

1.005–1.301

0.0412

0.516

1.156

1.006–1.329

0.0397