Genetic polymorphisms and gene expression of one-carbon metabolizing enzymes and their relation to breast cancer

Egyptian Journal of Medical Human Genetics

Table 3 Demographic and clinical data

Age (years)	Patients (n = 100)	Control (n = 100)	t	P
Min.–Max	24.0–74.0	21.0–74.0	1.634	0.104
Mean ± SD	49.80 ± 11.22	47.28 ± 10.58
Median	48.0	48.0

Family history of breast cancer	Patients (n = 100) No	Percentage (%)
Absent	82	82.0
Present	18	18.0
Smoking status
Smoker	26	26.0
Non-smoker	74	74.0
Breast-feeding status
Yes	72	72.0
No	28	28.0