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Table 4 Subgroup analysis

From: Polymorphisms of VEGF and VEGF receptors are associated with the occurrence of ovarian hyperstimulation syndrome (OHSS)—a retrospective case–control study

Allele frequencies in accordance to hospital stay
   OHSS-S (%) OHSS-L (%) P-value Chi OR (CI)
Mean (Range)   6.58 (2–9) 13.36 (10 – 28)    
VEGFR1-519 C 107 (93.9%) 112 (94.9%)    
  T 7 (6.1%) 6 (5.1%) 0.78 0.73 1.22 (0.39 - 3.75)
VEGFR2-604 T 56 (49.1%) 51 (43.2%)    
  C 58 (51.9%) 67 (56.8%) 0.79 0.78 0.93 (0.55 - 1.57)
VEGFR2-1192 G 99 (86.8%) 102 (86.4%)    
  A 15 (13.2%) 16 (13.6%) 1.0 0.92 0.97 (0.45 - 2.1)
VEGFr2-1719 T 25 (21.9%) 30 (25.4%)    
  A 89 (78.1%) 88 (74.6%) 0.54 0.53 1.22 (0.66 - 2.23)
VEGF-405 G 42 (36.8%) 49 (41.5%)    
  A 72 (63.2%) 69 (58.5%) 0.50 0.47 1.22 (0.72 - 2.06)
  1. Legend: Allel frequencies and p values are given for association of SNPs and duration time in hospital. OHSS-S: Duration in hospital 1–9 days, OHSS-L: Duration in hospital 10–28 days.