Table 2. The incidence of CIA in different groups.

Variable	No. CIA (%)
Age at diagnosis, y
>40 y	65/101 (64.36%)
≤40 y	7/64 (10.94%)
Chemotherapy regimen
FEC	42/85 (49.41%)
sequential-ECT	22/52 (42.31%)
FEC-T	4/19 (21.05%)
concurrent-ECT	4/9 (44.44%)
Previous childbearing*
0	2/7 (28.57%)
1	56/137 (40.88%)
≥2	12/19 (63.16%)
Tamoxifen use
Yes	47/106 (44.34%)
No	25/59 (42.37%)

^*the information about childbearing of two patients was not available.