Table 3 The association between BMI status and IVF treatment outcomes

Available embryo rate (%)

 Group 1

Reference

Reference

 Group 2

0.91 (− 2.35, 0.54)

0.218

− 1.32 (− 2.53, 0.12)

0.031

 Group 3

− 0.04 (− 1.09, 1.00)

0.933

− 0.14 (− 1.01, 0.72)

0.743

 Group 4

− 1.26 (− 2.51, 0.01)

0.048

− 1.70 (− 2.75, 0.64)

0.002

 P_-trend

− 0.27 (− 0.65, 0.12)

0.172

− 0.35 (− 0.67, 0.03)

0.031

High-quality embryo rate (%)

 Group 1

Reference

Reference

 Group 2

− 0.79 (− 2.39, 0.81)

0.332

− 0.96 (− 1.92, 0.01)

0.053

 Group 3

0.50 (− 0.66, 1.66)

0.397

− 0.01 (− 0.70, 0.68)

0.985

 Group 4

− 0.53 (− 1.91, 0.86)

0.454

− 1.11 (− 1.96, 0.27)

0.010

 P_-trend

− 0.01 (− 0.44, 0.42)

0.967

− 0.21 (− 0.47, 0.05)

0.107

Fertilization rate (%)

 Group 1

Reference

Reference

 Group 2

− 2.52 (− 3.62, 1.42)

 < 0.0001

− 2.46 (− 3.50, 1.42)

 < 0.0001

 Group 3

0.24 (− 0.56, 1.03)

0.559

0.23 (− 0.52, 0.97)

0.550

 Group 4

− 1.53 (− 2.48, 0.59)

0.002

− 1.48 (− 2.39, 0.57)

0.001

 P_-trend

− 0.21 (− 0.51, 0.08)

0.153

− 0.18 (− 0.46, 0.10)

0.208

Normal fertilization rate (%)

 Group 1

Reference

Reference

 Group 2

− 2.75 (− 4.02, 1.49)

 < 0.0001

− 2.91 (− 4.00, 1.83)

 < 0.0001

 Group 3

0.06 (− 0.86, 0.98)

0.896

0.06 (− 0.72, 0.83)

0.888

 Group 4

− 2.09 (− 3.19, 1.00)

 < 0.0001

− 2.24 (− 3.18, 1.29)

 < 0.0001

 P_-trend

− 0.37 (− 0.70, 0.03)

0.034

− 0.36 (− 0.65, 0.07)

0.014

Cleavage rate (%)

 Group 1

Reference

Reference

 Group 2

0.01 (− 0.29, 0.31)

0.966

0.02 (− 0.28, 0.33)

0.883

 Group 3

0.21 (− 0.01,0.43)

0.058

0.22 (0.01, 0.44)

0.050

 Group 4

− 0.07 (− 0.33, 0.19)

0.599

− 0.04 (− 0.31, 0.22)

0.741

 P_-trend

0.02 (− 0.06, 0.10)

0.672

0.03 (− 0.05, 0.11)

0.514

Blastocyst rate (%)

 Group 1

Reference

Reference

 Group 2

1.63 (− 0.40, 3.66)

0.116

1.27 (− 0.78, 3.32)

0.225

 Group 3

1.87 (0.39, 3.35)

0.013

1.37 (− 0.10, 2.84)

0.068

 Group 4

0.95 (− 0.81, 2.71)

0.289

0.11 (− 1.68, 1.90)

0.903

 P_-trend

0.46 (− 0.08, 1.00)

0.098

0.20 (− 0.35, 0.74)

0.480

OR (95% CI)

P-value

OR (95% CI)

P-value

Clinical pregnancy

 Group 1

Reference

Reference

 Group 2

1.21 (1.07, 1.38)

0.003

0.94 (0.82, 1.07)

0.329

 Group 3

1.04 (0.95, 1.14)

0.405

1.00 (0.91, 1.11)

0.926

 Group 4

1.18 (1.05, 1.31)

0.004

0.91 (0.81, 1.03)

0.131

 P_-trend

1.04 (1.00, 1.07)

0.037

0.98 (0.95, 1.02)

0.349

Abortion

 Group 1

Reference

Reference

 Group 2

1.32 (1.00, 1.74)

0.048

1.07 (0.80, 1.42)

0.648

 Group 3

0.87 (0.70, 1.09)

0.240

0.85 (0.68, 1.07)

0.164

 Group 4

1.26 (0.99, 1.61)

0.060

1.02 (0.80, 1.32)

0.858

 P_-trend

1.03 (0.95, 1.11)

0.508

0.98 (0.90, 1.06)

0.593

Live birth

 Group 1

Reference

Reference

 Group 2

1.18 (1.03, 1.34)

0.016

0.93 (0.81, 1.07)

0.305

 Group 3

1.07 (0.97, 1.18)

0.153

1.04 (0.94, 1.15)

0.437

 Group 4

1.13 (1.01, 1.27)

0.032

0.91 (0.80, 1.02)

0.105

 P_-trend

1.03 (1.00, 1.07)

0.061

0.99 (0.95, 1.02)

0.484