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Table 1

Patient characteristics

Characteristic	DCIS cases^a (n = 100)	DCIS controls^a (n = 100)
Demographic/reproductive
Median age, diagnosis (range)	52 yr (27–88)	51 yr (27–77)
Race
White	67	79
Black	12	10
Hispanic	15	6
Asian	3	4
Unknown	3	1
Median age, menarche (range)	13 yr (9–17)	13 yr (10–17)
Median age, first childbirth (range)	23 yr (15–38)	24 yr (16–39)
Pathologic/quantitative morphometric
Nuclear grade 1	6	6
Nuclear grade 2	38	38
Nuclear grade 3	56	56
Necrosis
Absent	48	32
Focal	20	28
Extensive	32	40
Median z score	8.42	7.67

Characteristic	DCIS cases^a (n = 100)	DCIS controls^a (n = 100)
Demographic/reproductive
Median age, diagnosis (range)	52 yr (27–88)	51 yr (27–77)
Race
White	67	79
Black	12	10
Hispanic	15	6
Asian	3	4
Unknown	3	1
Median age, menarche (range)	13 yr (9–17)	13 yr (10–17)
Median age, first childbirth (range)	23 yr (15–38)	24 yr (16–39)
Pathologic/quantitative morphometric
Nuclear grade 1	6	6
Nuclear grade 2	38	38
Nuclear grade 3	56	56
Necrosis
Absent	48	32
Focal	20	28
Extensive	32	40
Median z score	8.42	7.67

^a

Cases, DCIS with invasive cancer; controls, DCIS alone.