Skip to main content

Table 1 Baseline characteristics of the patients among groups A-B stratified by age

From: No advantage of single day 6 good-quality blastocyst transfer versus single day 5 poor-quality blastocyst transfer in frozen-thawed cycles stratified by age: a retrospective study

 

 < 35 years of age

 ≥ 35 years of age

Group A

Group B

P

Group A

Group B

P

Cycles (n)

558

665

 

165

235

 

female age(year)

29.84 ± 2.75

29.93 ± 2.86

0.274

36.65 ± 1.41

36.65 ± 1.37

0.498

BMI (kg/m2)

21.83 ± 3.31

21.47 ± 3.13

0.154

22.43 ± 3.69

22.20 ± 3.73

0.742

Infertility duration (years)

4.01 ± 2.44

3.98 ± 2.37

0.454

5.52 ± 3.75

5.28 ± 3.72

0.284

Type of infertility

  

0.652

  

0.754

 Primary infertility

58.42 (326/558)

57.14 (380/665)

 

32.12 (53/165)

33.62 (79/235)

 

 Secondary infertility

41.58 (232/558)

42.86 (285/665)

 

67.88 (112/165)

66.38 (156/235)

 

Fertilization method

  

0.160

  

0.259

 IVF

79.57 (444/558)

75.04 (499/665)

 

84.85 (140/165)

85.53 (201/235)

 

 ICSI

16.85 (94/558)

20.15 (134/665)

 

12.12 (20/165)

13.19 (31/235)

 

 IVF + ICSI

3.58 (20/558)

4.81 (32/665)

 

3.03 (5/165)

1.28 (2/235)

 

Endometrial preparation (%)

  

0.061

  

0.276

 Natural

31.72 (177/558)

36.84 (245/665)

 

48.48 (80/165)

42.98 (101/235)

 

 HRT

68.28 (381/558)

63.16 (420/665)

 

51.52 (85/165)

57.02 (134/235)

 

Endometrial thickness (mm)

8.96 ± 1.42

9.07 ± 1.46

0.085

8.89 ± 1.44

9.05 ± 1.46

0.956

  1. Group A, one poor-quality day 5 blastocyst
  2. Group B, one good-quality day 6 blastocyst