Table 1. The baseline characteristics of all study participants.

Characteristics	Patients (n = 606)	Controls (n = 633)
Age (years)	54.36±12.33	55.15±9.38
Family history of other cancers	10.56%	0%
Menarche age (years)	14.60±1.63	NA
≤12	22.44%	NA
13–14	37.13%	NA
15 +	40.43%	NA
Menopausal status
Premenopause	50.17%	NA
Postmenopause	49.83%	NA
Tumor size (T1–T4)
T1	49.80%	NA
T2	42.54%	NA
T3	3.83%	NA
T4	3.83%	NA
Tumor grade (G1–G3)
G1	4.87%	NA
G2	50.81%	NA
G3	44.32%	NA
Lymph node (+)	42.13%	NA

Data were expressed as mean ± standard deviation unless otherwise indicated.