Table 4.

Growth and development of participating girls, by breast cancer family history, LEGACY Girls Study, 2011 – 2015

	Breast cancer in 1st degree relatives (N=220)		Breast cancer in 2nd degree relatives only (N=313)		No breast cancer in 1st or 2nd degree relatives (N=507)
	N	% a	N	% a	N	% a
Menarche status
Pre-menarcheal	156	75	245	81	404	83
Post-menarcheal	53	25	56	19	84	17
Not reported	11		12		19
Age at menarche among post-menarcheal daughters (years)
≤9	5	5	2	4	4	4
10	11	10	6	11	11	14
11	34	31	14	26	27	33
12	44	40	23	43	29	36
13	14	13	7	13	8	10
14	0	0	0	0	2	2
15	1	1	1	2	0	0
Not reported	1		0		3
Breast Tanner stage b
T1	90	47	150	53	267	60
T2	30	16	46	16	73	16
T3	41	21	54	19	60	13
T4	21	11	28	10	37	8
T5	10	5	4	1	11	2
Not reported	28		31		59
Pubic hair Tanner stage b
T1	99	50	180	63	277	60
T2	31	16	31	11	88	19
T3	20	10	27	9	35	8
T4	34	17	32	11	38	8
T5	14	7	16	6	21	5
Not reported	22		27		48
Height for age (percentiles) c
<5th	1	0	10	3	21	4
≥5th to <85th	153	71	216	72	360	73
≥85th to <95th	36	17	42	14	59	12
≥95th	24	11	31	10	56	11
Not available	1		14		11
Not measured	0		12		8
Weight for age (percentiles) c
<5th	6	3	11	4	30	6
≥5th to <85th	164	75	235	78	369	74
≥85th to <95th	31	14	24	8	53	11
≥95th	19	9	31	10	47	9
Not available	0		12		8
Body mass index for age (percentiles) c
<5th	24	11	20	7	39	8
≥5th to <85th	148	68	226	76	371	75
≥85th to <95th	29	13	28	9	51	10
≥95th	18	8	25	8	35	7
Not available	1		14		11
Waist-to-hip ratio
< 0.79	55	25	57	19	121	24
0.80 – 0.83	63	29	89	30	147	30
0.84 – 0.87	42	19	78	26	112	22
≥0.88	60	27	76	25	118	24
Not measured	0		13		9
Percent body fat
< 22.5	56	26	77	26	111	23
22.5 – 27.4	57	26	76	26	122	25
27.5 – 32.8	45	21	83	28	124	25
≥32.9	58	27	60	20	133	27
Not measured	4		17		17

^aPercentages may not add up to 100 because of rounding. Girls with missing data were not included in percentages.

^bAssessed by the mother/guardian.

^cCalculated from CDC growth charts http://www.cdc.gov/nccdphp/dnpao/growthcharts/resources/sas.htm.