Table 3. Results of ovarian follicular aspiration in the Elective Group and Oncofertility Group.
Variable Total (n=367) Elective Group (n=327) Oncofertility Group (n=40) p Padjusted*
Retrieved Follicles - median (IQR) 12 (8–18) 12 (8–18) 15 (7–20) 0.289 0.052
Retrieved oocytes - median (IQR) 8 (5–13) 8 (5–13) 9 (5–17) 0.347 0.171
Number of matured oocytes
(MII) - median (IQR)

Total
≤ 35 years
> 35 years
6 (3–11)
8 (4–13)(n=113)
5 (3–9)(n=254)
6 (3–11)
7 (4–13)(n=83)
5 (3–9)(n=244)
7 (3–12)
8 (6–13)(n=30)
2.5 (2–8)(n=10)
0.481
0.669
0.079
0.113
0.085
0.231
MII ≥ 8 - n (%)
≤ 35 years
> 35 years
148 (40.3)
57 (50.4)
91 (35.8)
130 (39.8)
41 (49.4)
89 (36.5)
18 (45.0)
16 (53.3)
2 (20.0)
0.640
0.876
0.502
0.701§
0.448§
0.914§
Percentage of MII oocytes
(MII/Retrieved oocytes
mean ±SD
71.6±23.9 72.1±23.7 67.4±25.9 0.242 0.028
Percentage of MII oocytes
(MII/Retrieved oocytes)
mean ±SD

≤ 35 years
> 35 years
72.8±22.6
71.0±24.6
72.2±23.2
71.4±24.2
69.2±23.7
62.0±32.3
0.301
0.240
0.192

MII: Mature oocytes in metaphase II; * Adjusted by age, FSH and GnRH protocol through a generalized linear model. Student’s t-test, Mann-Whitney or §Chi-square.