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Table 3 Birth outcomes by infertility diagnosis (N = 490)

From: Fertility treatments and the risk of preterm birth among women with subfertility: a linked-data retrospective cohort study

  Term Preterm Total P value*
N Row% N Row% N Col%
Tubal factor        
 No 341 82.8% 71 17.2% 412 84.1% 0.044
 Yes 57 73.1% 21 26.9% 78 15.9%  
Endometriosis        
 No 299 83.3% 60 16.7% 359 73.3% 0.053
 Yes 99 75.6% 32 24.4% 131 26.7%  
Ovulation dysfunction        
 No 190 84.1% 36 15.9% 226 46.1% 0.135
 Yes 208 78.8% 56 21.2% 264 53.9%  
Uterine factor        
 No 347 81.6% 78 18.4% 425 86.7% 0.540
 Yes 51 78.5% 14 21.5% 65 13.3%  
Male factor        
 No 243 82.4% 52 17.6% 295 60.2% 0.423
 Yes 155 79.5% 40 20.5% 195 39.8%  
Unexplained infertility        
 No 235 81.9% 52 18.1% 287 59.5% 0.604
 Yes 156 80.0% 39 20.0% 195 40.5%  
Multiple female factors        
 No 294 83.5% 58 16.5% 352 71.8% 0.037
 Yes 104 75.4% 34 24.6% 138 28.2%  
Multiple female and male factors        
 No 299 83.1% 61 16.9% 360 73.5% 0.084
 Yes 99 76.2% 31 23.8% 130 26.5%  
Total 398 81.2% 92 18.8% 490 100.0%  
  1. 2 comparing to women who were not told or suspect diagnosis
  2. ∙ Diagnostic categories—SART CORS classification
  3. – Tubal factor—pelvic adhesion or scarring, blocked or damaged fallopian tubes
  4. – Endometriosis
  5. – Ovulation dysfunction—low progesterone, low estrogen, not ovulating, abnormal ovulation, lutenized unruptured follicule (LUF), Luteal Phase Defect (LUD), PCOS
  6. – Uterine factor—hostile or limited cervical mucus, fibroids in the uterus, polyps in the uterus,
  7. – Male factor
  8. – Unknown infertility—unexplained subfertility
  9. – Multiple female factors—more than one of the following diagnosis Tubal, Endometriosis, Ovulation dysfunction, or Uterine
  10. – Female and male factor—male factor plus at least one female factor