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Table 2 Multivariate logistic regression model of factors associated with ET for the prediction of ongoing pregnancy

From: Predictive value of the time interval between embryo loading and transfer for IVF/ICSI success: a prospective cohort study

  Pregnancy No pregnancy Univariate analysis Multivariate analysis
  (n = 112) (n = 298) OR 95 % CI LR test OR 95 % CI LR test
Age (years)a 30.4 ± 5.0 32.2 ± 5.3 0.94 (0.90;0.98) 0.008 0.94 (0.89;0.99) 0.013
BMI (mg/m2)a 24.1 ± 4.8 24.7 ± 5.8 0.98 (0.94;1.02) 0.347 - - -
Catheter typeb 84 (75.0) 254 (85.2) 0.52 (0.30;0.90) 0.02 0.45 (0.24;0.84) 0.013
Time interval between oocyte retrieval and ET (days)a 3.5 ± 1.2 3.1 ± 1.3 1.23 (1.03;1.47) 0.02 1.16 (0.94;1.43) 0.169
Substance used for ovulation induction hCGb 89 (79.5) 237 (79.5) Reference Reference 0.558 - - -
Synthetic GnRHb 3 (2.7) 13 (4.4) 0.45 (0.10;2.05) - -
Choriogonadotropin alphab 20 (17.6) 48 (16.1) 2.12 (1.16;3.86) - -
ELT (seconds)a 42.5 ± 19.8 40.1 ± 18.5 1.01 (0.99;1.02) 0.314 - - -
TIEL-ET (seconds)a 56.5 ± 21.9 60.0 ± 25.4 1.00 (0.99; 1.00) 0.496 - - -
Uterine position Antevertedb 94 (83.9) 261 (87.6) Reference Reference 0.144 - - -
Midposedb 14 (12.5) 26 (8.7) 1.85 (0.88;3.89) - -
Retrovertedb 2 (1.8) 11 (3.7) 0.33 (0.04;2.67) - -
Uterine angle (Corpus–Cervix) Normalb 77 (68.8) 178 (59.7) Reference Reference 0.108 - - -
Pointedb 27 (24.1) 54 (18.1) 1.22 (0.67;2.22) - -
Very pointedb 8 (7.1) 66 (22.1) 0.42 (0.17;1.05) - -
Uterine length (mm)a 85.2 ± 12.4 80.7 ± 40.9 1.03 (1.01;1.05) 0.015 1.03 (1.01;1.06) 0.006
Endometrial thickness (mm)a 12.1 ± 3.5 11.4 ± 2.7 1.05 (0.99;1.12) 0.125 - - -
Endometrial length (mm)a 29.1 ± 8.1 28.6 ± 7.4 1.01 (0.97;1.04) 0.640 - - -
  1. ET embryo transfer, OR odds ratio, CI confidence interval, LR test likelihood ratio test, hCG human chorion gonadotropin, GnRH gonadotropin releasing hormone, ELT embryo loading time, TIEL-ET time interval between embryo loading and ET
  2. Data are provided as amean ± standard deviation or b n (%)