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Table 3 Baseline characteristics and IVF outcomes in the POA and control groups in women aged 33–37 years

From: Predictive value of age-specific FSH levels for IVF-ET outcome in women with normal ovarian function

Characteristics 33 ~ 37 years old t/z(χ 2 ) P
  Control POA   
n 311 228   
Age(y)a 34.82 ± 1.25 34.86 ± 1.32 −0.327 0.744
Infertility years(y)a 5.67 ± 3.65 5.43 ± 3.54 0.736 0.462
BMI(kg/m2)a 21.89 ± 2.98 21.29 ± 2.98 2.336 0.020
FSH(IU/L)a 6.74 ± 1.10 9.64 ± 1.05 −30.747 <0.001
LH(IU/L)b 3.67(2.69–4.84) 4. 47 (3.36–5.69) 26.754 <0.001
E2(ng/L)b 36.00(25.00–50.48) 37.77(24.00–51.74) 1.036 0.309
FSH/LHb 1.87(1.41–2.51) 2.18(1.66–2.88) 20.070 <0.001
AFC(n)a 15.14 ± 6.30 12.98 ± 5.29 4.313 <0.001
Total dose of Gn (IU)a 2,121.75 ± 766.98 2,470. 68 ± 812.84 −5.087 <0.001
E2 level on DHCG (ng/L)b 3,505.00 (2,276.75–4,800.00) 2,804.00 (1,844.50–4,765.25) 7.670 0.006
Number of retrieved oocytes(n)a 12.81 ± 6.88 11.06 ± 5.79 3.080 0.002
Rate of POR(%)c 4.50(14/311) 8.77(20/228) 4.059 0.044d
Number of frozen embryos (n)b 4.00(1.00–7.00) 3.00(1.00–6.00) 3.978 0.046
Number of available embryos (n)b 6.00(3.00–8.00) 5.00(3.00–8.00) 2.920 0.088
Fertilization rate (%)c 83.33(71.43–92.31) 85.71(70.80–100.00) 2.132 0.144
Cleavage rate (%)c 100.00 (100.00–100.00) 100.00 (100.00–100.00) 0.177 0.674
Cancellation rate(%)c 0. 96(3/311) 2.60(6/228) 2.226 0.136e
Pregnancy rate(%)c 46.43(143/308) 42.79 (95/222) 0.689 0.406
  1. a The normally distributed data are presented as the mean ± SD, including age, infertility years, BMI, FSH, AFC, total dose of Gn, and number of retrieved oocytes. The t-test was performed to analyze statistical significance
  2. bThe non-normally distributed data are presented as the median (25–75th percentile). The non-parametric Mann–Whitney test was performed to calculate the Z-score
  3. cThe chi-square (χ 2) test was performed to analyze statistical significance
  4. dThe rate of POR = (the cycles of oocyte yields ≤ 3 + the cycles cancelled egg retrieval)/the total cycles
  5. eThe cancellation rate only included the cycles of cancelled egg retrieval