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Table 3 Association between endometrial thickness change ratio and clinical pregnancy rate in different models

From: Effect of endometrial thickness changes on clinical pregnancy rates after progesterone administration in a single frozen-thawed euploid blastocyst transfer cycle using natural cycles with luteal support for PGT-SR- and PGT-M-assisted reproduction: a retrospective cohort study

  Crude modela Adjusted model Ib Adjusted model IIc
OR (95% CI) P value OR (95% CI) P value OR (95% CI) P value
Endometrial thickness change ratio (per 10%) 1.24 (1.02, 1.52) 0.034 1.25 (1.01, 1.54) 0.036 1.29 (1.01, 1.64) 0.040
Grouping of endometrial thickness
  = 0 (non-change) Reference   Reference   Reference  
  < 0 (compaction) 0.48 (0.23,0.99) 0.046 0.47 (0.22,0.97) 0.042 0.41 (0.17,0.99) 0.049
  > 0 (expansion) 1.08 (0.56,2.06) 0.826 1.05 (0.54,2.06) 0.876 1.13 (0.54,2.37) 0.753
 P for trend 0.025 0.028 0.025
  1. Note: BMI body mass index, AMH anti-Müllerian hormone, E2 estradiol, P progesterone, OR odds ratio, CI confidence interval
  2. aNo adjustments for other covariates
  3. bAdjusted for female age at transfer, BMI, infertility duration and infertility type
  4. cAdjusted for all covariables in model I plus AMH, E2 on the day of P administration and genetic category