Table 4 Congenital malformation analysis based on ICD-10 codes.

From: Blastocyst quality and congenital malformation risk in singleton births after frozen embryo transfer

ICD codes

GQE(N = 1162)

PQE(N = 581)

Chi-square

P value

Q05

1 (0.09%)

0 (0.00%)

0.5003

0.4794

Q17

1 (0.09%)

1 (0.17%)

0.2503

0.6169

Q21

5 (0.43%)

6 (1.03%)

2.2414

0.1344

Q37

1 (0.09%)

0 (0.00%)

0.5003

0.4794

Q42

1 (0.09%)

0 (0.00%)

0.5003

0.4794

Q43

2 (0.17%)

0 (0.00%)

1.0011

0.317

Q54

3 (0.26%)

0 (0.00%)

1.5026

0.2203

Q63

1 (0.09%)

0 (0.00%)

0.5003

0.4794

Q65

1 (0.09%)

0 (0.00%)

0.5003

0.4794

Q79

0 (0.00%)

2 (0.34%)

4.0046

0.2110

Q82

0 (0.00%)

2 (0.34%)

4.0046

0.2110

Q90

1 (0.09%)

1(0.17%)

0.2503

0.6169

Q99

2 (0.17%)

0 (0.00%)

1.0011

0.3170

Multiple congenital malformations

1 (0.09%)

0 (0.00%)

0.5003

0.4794

Congenital malformations

20 (1.72%)

12 (2.07%)

0.2547

0.6138

  1. GQE: good-quality embryo, PQE: poor-quality embryo. Values are presented as n (%). Congenital malformations were classified according to ICD-10 codes. P values were calculated using Pearson’s Chi-squared test, with Yates’ continuity correction applied for cases with low expected frequencies.
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